Outage: Some data is not available due to a technical issue. This affects some observations and forecasts.

Greater Adelaide in April 2021: drier than average

Rainfall in April was less than average at all sites across Adelaide and the Hills, with monthly totals particularly below average in the northern suburbs. Daytime temperatures were above average during the first week of April, but were close to average or cooler than average through most of the rest of the month. Night-time temperatures were generally close to average, but slightly warmer than average near the start of the month, followed by several cold nights on the 12th and through the second half of April.

Drier than average

  • Rainfall in April was less than average at all sites across Adelaide and the Hills.
  • Rainfall was generally closer to average in southern suburbs, but below average in the north.
  • Rainfall totals in April ranged from 29% of average at Edinburgh RAAF to 63% of average at Kuitpo Forest Reserve.
  • On the 13th, strong north to north-westerly winds raised dust that affected visibility across Greater Adelaide.

Warm start to the month, generally cool second half

  • Daytime temperatures were above average around the start of the month, but were close to average or cooler than average through most of the rest of the month.
  • Mean maximum temperatures for April were close to or above average at all sites across Adelaide and the Hills.
  • Mean maximum temperatures ranged from eqaulling the average at Noarlunga to 2.1 °C above average at Mount Lofty.
  • Night-time temperatures were generally close to average, but slightly warmer than average near the start of the month and several cold nights, on the 12th and through the second half of April.
  • Mean minimum temperatures were close to average or below average at sites across Adelaide and the Hills.
  • Mean minimum temperatures ranged from 1.9 °C below average at Parafield Airport to 0.4 °C above average at Mount Crawford.
  • Parafield Airport had its lowest April mean daily minimum temperature since 2001.

Adelaide (West Terrace / ngayirdapira)

  • Total rainfall for Adelaide (West Terrace / ngayirdapira) was 16.8 mm, which is 38% of the long-term average of 43.9 mm.
  • The mean daily maximum temperature for Adelaide (West Terrace / ngayirdapira) was 23.1 °C, which is 0.9 °C above the long-term average of 22.2 °C.
  • The warmest day was 33.7 °C on the 3rd, and the coolest day was on the 21st when the temperature reached 17.1 °C.
  • The mean daily minimum temperature for Adelaide (West Terrace / ngayirdapira) was 11.7 °C, which is 1.1 °C below the long-term average of 12.8 °C.
  • The coldest morning was 6.4 °C on the 21st, and the warmest morning was on the 3rd when the minimum temperature was 17.3 °C.

Further information

Media
(03) 9669 4057

Extremes in April 2021
Hottest day 34.2 °C at Parafield Airport on the 3rd
Warmest days on average 24.2 °C at Parafield Airport
Coolest days on average 18.3 °C at Mount Lofty
Coldest day 11.2 °C at Mount Lofty on the 21st
Coldest night 2.3 °C at Mount Barker on the 21st
Coolest nights on average 9.9 °C at Parafield Airport
Warmest nights on average 12.8 °C at Noarlunga
Warmest night 21.2 °C at Mount Crawford AWS on the 3rd
Warmest on average overall 17.6 °C at Noarlunga
Coolest on average overall 14.3 °C at Mount Lofty
Wettest overall 46.2 mm at Ashton
Wettest day 13.6 mm at Kuitpo Forest Reserve on the 14th
Strongest wind gust 67 km/h at Edinburgh RAAF on the 13th

Lowest April mean daily minimum temperature for at least 20 years
Observed
(°C)
Most recent
lower
Average for
April
Parafield Airport 9.9 9.4 in 2001 11.8



Summary statistics for April 2021
Maximum temperatures
(°C)
Minimum temperatures
(°C)
Rainfall
(millimetres)
Mean for
April
2021
Diff
from
average
Highest for
April
2021
Mean for
April
2021
Diff
from
average
Lowest for
April
2021
Total for
April
2021
Average
for
April
Rank of
April
2021
Fraction of
April
average
Adelaide (West Terrace / ngayirdapira) 23.1 +0.9 33.7 3rd 11.7 -1.1 6.4 21st 16.8 43.9 low 38%
Adelaide Airport 22.5 +0.2 33.0 3rd 11.4 -0.5 6.7 21st 11.2 34.4 low 33%
Edinburgh RAAF 23.5 +0.3 34.1 3rd 10.7 -1.1 5.1 21st 8.8 30.4 low 29%
Kuitpo Forest Reserve 20.3 +0.5 30.8 2nd 11.5 +0.2 6.0 21st 36.0 56.8 average 63%
Mount Crawford AWS 20.4 +1.0 30.7 2nd 11.0 +0.4 5.6 21st 16.6 43.8 average 38%
Mount Lofty 18.3 +2.1 28.5 2nd 10.2 +0.3 4.4 21st 34.6 61.0 low 57%
Noarlunga 22.4 0.0 32.7 3rd 12.8 -0.9 7.5 21st 18.0 33.5 low 54%
Parafield Airport 24.2 +1.3 34.2 3rd 9.9 -1.9 4.1 21st 14.6 38.2 low 38%

Daily maximum temperatures for April 2021
123456789101112131415161718192021222324252627282930
Adelaide (West Terrace / ngayirdapira)32.333.433.729.925.728.332.522.419.619.321.423.521.020.620.119.620.220.518.417.119.418.720.020.220.521.220.722.726.8
Adelaide Airport31.432.333.025.924.628.023.831.420.719.819.421.923.420.520.119.219.519.720.919.016.919.118.919.619.819.318.920.320.525.9
Edinburgh RAAF32.133.534.131.329.033.521.920.819.921.624.821.220.620.919.220.221.718.418.120.019.820.120.620.421.921.123.127.9
Kuitpo Forest Reserve28.830.830.428.721.521.827.429.118.016.515.619.121.717.817.716.416.517.117.214.014.015.717.117.316.117.818.219.922.024.4
Mount Barker31.622.619.217.019.122.020.419.717.718.418.618.014.415.218.218.021.819.819.421.422.324.524.8
Mount Crawford AWS29.230.730.430.223.823.728.228.919.316.814.517.221.216.717.615.916.816.516.713.714.215.115.917.217.918.918.620.123.223.7
Mount Lofty27.028.528.227.622.322.926.427.317.014.512.616.918.014.714.513.915.312.914.212.111.213.413.115.315.417.016.918.421.221.7
Noarlunga31.432.532.728.326.326.624.431.021.319.519.820.622.820.420.220.018.919.520.117.916.119.618.719.318.919.320.020.021.525.6
Parafield Airport32.833.934.231.527.328.029.232.922.520.820.822.025.322.521.721.420.220.522.119.317.820.419.620.821.221.022.022.024.227.7
Values are the maximum temperature, usually in the 24 hours from 9 am on the day indicated,
and typically occurred in the afternoon of that day.
Temperatures coloured according to their difference
from the long-term average for the period
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 +1.0 +2.0 +3.0 +4.0 +5.0 +6.0 +7.0 +8.0 +9.0 +10.0 °C Grey outline marks highest
and lowest for the period

Daily minimum temperatures for April 2021
123456789101112131415161718192021222324252627282930
Adelaide (West Terrace / ngayirdapira)13.915.417.315.812.911.111.413.014.214.012.07.814.315.313.79.010.213.812.211.06.410.112.811.98.67.98.38.28.09.6
Adelaide Airport12.812.815.414.313.110.210.412.014.414.612.87.614.115.615.08.910.014.212.210.06.711.014.011.88.07.37.77.67.68.5
Edinburgh RAAF12.714.616.714.49.712.715.113.713.06.614.214.011.98.67.913.310.68.95.110.311.510.57.87.06.37.16.48.9
Kuitpo Forest Reserve17.117.419.018.512.810.410.515.310.910.89.58.012.211.911.710.08.59.811.011.16.09.010.310.610.78.39.08.911.712.7
Mount Barker10.310.87.29.94.912.412.010.07.55.18.49.58.52.310.110.08.16.59.85.04.35.77.4
Mount Crawford AWS16.516.921.219.910.29.613.217.911.19.68.15.810.710.59.28.98.09.810.08.75.68.29.89.79.57.88.310.011.813.2
Mount Lofty16.716.619.618.610.49.412.017.29.78.87.55.39.39.29.08.86.99.18.68.84.46.69.08.98.37.57.89.110.612.8
Noarlunga15.818.418.617.015.514.512.813.913.414.112.98.315.014.014.810.69.612.213.413.07.511.612.912.710.79.810.110.010.611.2
Parafield Airport11.112.914.612.714.411.28.310.712.913.311.36.014.214.410.36.64.813.410.38.64.110.312.810.35.55.96.55.65.87.3
Values are the minimum temperature, usually in the 24 hours to 9 am on the day indicated,
and typically occurred that morning.
Temperatures coloured according to their difference
from the long-term average for the period
-10.0 -9.0 -8.0 -7.0 -6.0 -5.0 -4.0 -3.0 -2.0 -1.0 0.0 +1.0 +2.0 +3.0 +4.0 +5.0 +6.0 +7.0 +8.0 +9.0 +10.0 °C Grey outline marks highest
and lowest for the period

Daily rainfall for April 2021
123456789101112131415161718192021222324252627282930
Adelaide (Glen Osmond) 1.0 0.8 - - - 4.8 0.6 - - 2.0 3.8 5.8 2.6 - - - - - - -
Adelaide (Hope Valley Reservoir) - - - - - - - - - - - - - 3.0 1.5 0.2 - 1.4 0.2 0.3 2.0 7.8 3.0 0.2 - - - - -
Adelaide (Keswick) - - - - - - - - 0.8 0.8 0.2 - - 2.0 0.8 0.2 - - 0.6 0.4 3.6 4.6 1.6 0.2 - - - - - -
Adelaide (Morphett Vale) - - - - - - - - 1.6 0.4 - - - 9.2 - - - - 1.6 2.0 - 6.2







Adelaide (Seaton)












1.6 1.0


1.8
3.6 2.4







Adelaide (West Terrace / ngayirdapira) - - - - - - -
0.6 0.6 0.8 - - 1.2 3.2 - - - 1.2 0.2 2.8 2.2 4.0 - - - - - - -
Adelaide Airport - - - - - - - - 0.6 0.4 0.8 - - 1.0 2.8 - - - 1.0 1.4 0.8 1.0 1.4 - - - - - - -
Aldgate - - - - - - - - 1.0 1.4 1.2 - - 10.6 1.8 1.6 - - 0.8 1.6 - 11.8 3.4 - - - - - - -
Ashton - - - - - - - - 1.4 1.8 - - - 12.8 3.6 0.4 0.4 - 2.0 1.0 7.4 11.2 3.0 0.2 0.2 0.2 0.2 0.2 0.2 -
Ashton Co-op - - - - - - - - 1.4 2.6 - 0.2 - 9.8 2.0 0.6 0.2 - 2.8 1.6









Athelstone (Black Hill Alert) - - - - - - - - 0.2 0.8 0.6 - - 4.0 1.4 - - 0.4 0.6 0.4 2.2 5.8 4.8 0.2 - - - - - -
Balhannah (Gumbooya) - - - - - - - - 2.0 1.4 - - - 5.2 1.4 0.8 0.2 - 0.2 0.2 3.2 6.8 1.6 - - - 0.4 - - -
Beaumont - - - - - - - - 0.8 1.0 0.2 - - 3.8 0.2 0.2 - 0.4 0.8 0.6 5.6 3.8 1.6 0.2 - - - - - -
Belair - - - - - - - - 0.6 1.4 0.8 - - 7.2 0.6 1.2 - 0.2 0.8 1.0 2.0 5.0 1.8 - - - - - - -
Belair (St Johns) - - - - - - - - 1.2 1.8 0.4 - - 6.4 0.6 0.4 - 0.6 0.8 1.6 3.2 6.4 1.2 - - 0.2 - - - -
Belair (State Flora Nursery) - - - - - - - - 3.4 4.2 0.2 - - 8.0 - - 11.6 2.6 - - 0.6
Bellevue Heights - - - - - - - - 0.6 1.8 0.2 - - 7.4 0.2 - 0.2 0.2 1.6 5.8 - 3.6 1.2 - - - - - - -
Birdwood - - - - - - - - 0.8 0.2 - - - 2.8 0.3 0.4 - - - 0.6 3.8 5.0 3.6 0.2 - 0.4 - - - -
Birdwood (McVittie's Hill) - - - - - - - - 0.4 0.2 - - - 1.6 0.8 0.6 - - - - 7.2 2.0 0.8 - 0.2 0.2 - - - -
Bridgewater - - - - - - - - - - 6.0 - - 11.0 - - 6.0 - 1.0 2.0 - 7.2 2.2






Brownhill Creek (Scotch College) - - - - - - - - 0.6 1.0 - - - 4.4 0.2 - - - 0.2 0.6 7.6 6.6 1.0 - - - - - - -
Burnside - - - - - - - - 0.8 0.6 - - - 4.2 0.8 - - - 1.0 0.4 3.4 6.6 2.2 - - - - - - -
Clarendon







3.0

8.0 2.0


2.0
13.0





Crafers West - - - - - - - - 1.0 2.2 0.4 - - 9.8 1.2 1.0 - - 2.0 1.0 3.0 8.0 2.4 - - 0.2 - - - -
Cromer Road - - - - - - - - 0.6 0.4 0.2 - - 1.8 0.4 0.2 0.2 - - - 5.2 4.0 2.2 - - 0.2 - 0.2 - -
Cudlee Creek (Millbrook Reservoir) - - - - - - - - 0.6 - - - - 4.8 1.6 0.4 - - - 0.2 4.0 7.4 3.2 - - - - 0.1 -
Cudlee Creek (Odea Road) - - - - - - - - 0.6 0.4 0.4 - - 3.8 0.6 0.2 - 0.2 - - 6.2 5.2 3.6 - - 0.4 - - - -
Edinburgh RAAF - - - -


- - 0.4 0.6 - - 1.8 - - - - - - 3.8 1.6 0.2 0.4 - - - - - -
Felixstow (Payneham) - - - - - - - - 0.2 0.4 0.6 - - 2.8 2.6 - - - 1.6 0.2 3.0 3.4 4.4 - - - - - - -
Forreston Alert - - - - - - 0.2 - 0.6 0.4 0.2 - - 2.4 1.6 - - 0.2 - 0.2 3.0 6.0 2.6 - 0.2 - 0.2 - 0.2 -
Gawler - - - - - - - - - 0.2 0.2 - - 3.6 - - - - - 0.2 1.4 2.8 0.6 0.2 - - - - - -
Gould Creek (Hermitage) - - - - - - - - 0.4 1.4 0.2 - - 2.0 0.4 0.2 - 0.4 - 0.4 5.2 3.6 2.2 - - - - - - -
Greenacres - - - - - - - - 0.2 1.0 0.8 - - 3.0 1.0 0.2 - 0.4 1.4 0.2 1.4 3.4 3.2 0.2 - - - - - -
Gumeracha - - - - - - - - 0.6 - - 0.8 - 3.9 1.4 0.1 - - - 0.1 4.6 5.0 4.0 - - 0.8 - - - -
Hahndorf - - - - - - - - 0.9 1.2 0.4 - - 6.8 1.1 0.7 0.1 - 0.1 - 0.4 5.9 1.1 - 0.1 0.1 0.1 - - -
Halbury Road Salisbury (Halbury Road) - - - - - - - - 0.4 0.6 0.2 - - 1.4 0.4 0.4 - 0.6 - 0.2 3.2 1.6 1.2 0.4 - - - - - -
Happy Valley Reservoir - - - - - - - - 1.0 1.0 0.4 - - 4.4 6.6 0.4 - - 1.2 - 2.0 6.6 1.8 0.2





Harrogate (Mount Beevor South) - - - - - - - - 1.2 - - 0.2 - 0.6 - 0.6 - - - 0.4 6.6 1.2 - - - 0.2 - - - -
Inglewood - - - - - - - - 0.4 0.4 0.4 - - 4.4 2.0 - - 0.2 - 0.2 4.6 8.4 5.2 - - 0.2 0.2 - - -
Ironstone Road - - - - - - - - 0.6 1.0 - - - 3.2 1.4 0.4 - - - 0.4 4.2 8.0 5.0 0.2 0.2 - 0.2 - 0.2 -
Kangarilla (Saddlebags) - - - - - - 0.2 - 2.2 3.4 0.6 - - 13.4 0.4 1.8 0.2 - 0.2 2.2 0.2 6.8 1.4 - - 0.2 0.2 - - -
Kanmantoo (Millbrae) - - - -
- - 0.2 1.0 - - - - 1.4 0.4 1.4 - - - 0.2 3.4 1.2 - - - - - - - -
Kersbrook - - - - - - - - 0.4 0.8 - - - 3.8 0.6 0.2 0.2 - - 0.2 3.6 5.8 3.4 0.2 - 0.4 - - - -
Kilburn - - - - - - - - 0.4 0.8 1.0 - - 1.4 0.8 - - 1.0 1.0 0.2 3.4 1.0 2.4 - - - - - - -
Kuitpo Forest Reserve - - - - - - 0.2 0.2 1.2 0.8 0.4 - - 13.6 0.2 2.0 0.2 - 1.2 6.2 0.2 7.6 1.0 0.2 0.2 0.2 0.2 - 0.2 -
Lenswood - - - - - - - - 1.8 1.0 0.8 - - 7.4 0.4 0.8 - - 0.4 0.8 3.8 5.8 1.4 - - - 0.2 - - -
Lenswood (Stringybark) - - - - - - - - 0.4 0.4 0.2 0.2 - 5.0 1.2 1.0 - - 0.4 0.4 7.6 7.2 3.6 - - 0.2 - - - -
Lobethal (Graeber) - - - - - - - - 0.8 0.6 0.2 - - 3.0 0.8 - 0.2 - - 0.2 3.0 3.2 0.8 - - 0.2 - - - -
Lobethal (Maidment Road) - - - - - - - - 0.6 0.4 - - - 3.0 0.6 0.6 0.2 - - - 9.8 4.4 1.2 - - 0.2 0.2 - - -
Long Ridge (Greenhill) - - - - - - - - 1.0 1.6 0.2 - - 4.6 0.6 0.6 - - 1.2 0.6 7.6 5.4 2.2 - - - - - - -
Longwood Alert - - - - - - - - 1.0 1.4 0.4 - - 9.0 1.0 1.6 - - 0.4 3.6 0.8 10.0 1.4 - - - - - - -
McLaren Vale (Pirramimma Winery) - - - - - - - - 0.8 - - - 3.0 9.4 - - - - 3.0 6.8 - 4.6






Meadows - - - - - - - - - 0.2 - 0.6 - 12.4 - 3.0 - - 0.8 5.6 0.8 5.8 0.8 0.2 0.2 0.2 0.2 0.2 - -
Mitchell Park (Marion) - - - - - - - - 0.6 0.2 0.2 - - 2.6 - - - - 0.4 2.2 0.2 2.8 1.0 - - - - - - -
Montacute - - - - - - - - - 1.2 0.2 - - 5.0 0.8 2.0 - - 0.4 0.2 6.6 7.6 3.8 - - - - - 0.2 -
Morphettville - - - - - - - - 0.4 0.8 0.4 - - 1.2 - - - - - 1.2 0.2 1.4 0.8 - - - - - - -
Mount Barker - - 2.4 0.4 - - 6.4 0.6 3.4 0.2 - 0.2 1.2 1.2 5.8 1.6 - - - - - - -
Mount Bold Reservoir - - - - - - - - 1.6 2.6 1.4 - - 8.0 5.0 2.2 - - 0.6 - 1.8 6.6 1.4






Mount Crawford AWS - - - - - - 0.2 - 0.2 0.2 1.0 - - 2.8 0.8 1.4 0.2 - - - 3.0 3.8 2.4 0.4 - 0.2 - - - -
Mount Lofty - - - - - - - - 0.6 2.2 0.4 0.2 - 9.8 1.6 0.6
- 2.2 0.8 5.2 8.2 2.2 0.2 - 0.2 - 0.2 - -
Mt Bold (Scott Creek Alert) - - - - - - - - 1.4 1.4 0.4 - - 8.6 0.2 3.8 0.2 - 0.2 1.6 0.2 9.0 2.0 0.2 - - - - - -
Mt Torrens - - - - - - - - 0.8 0.2 0.2 0.2 - 1.0 1.6 0.6 0.2 - - 0.2 5.0 3.4 0.6 - 0.2 0.2 0.2 - - -
Mylor (Biggs Flat) - - - - - - - - 1.6 2.0 0.6 0.2 - 5.2 0.8 1.6 - 0.2 0.6 1.2 1.4 7.2 1.0 0.2 - - 0.2 - - -
Nairne - - - - - - - - 1.4 0.4 - - - 3.0 1.6 2.8 - - - 1.0 2.6 4.0 2.0 - 0.4


Noarlunga - - - - - - - - 0.6 0.2 0.6
- 9.2 - - 0.2 - 0.8 2.0 - 3.4 1.0 - - - - - - -
North Adelaide - - - - - - - - - 2.0 - - - 1.0 2.4 - - - 1.0 - 3.4 3.2 3.6






Parafield Airport - - - - - - - - - 0.8 0.6 - - 0.8 - - - 1.6 - - 7.0 1.8 2.0 - - - - - - -
Piccadilly (Woodhouse) - - - - - - - - 1.4 3.0 1.4 - - 11.0 2.0 - - - - 4.2 - 8.0 1.6 0.2 - 0.2



Prospect Hill - - - - - - - - 1.4 - 0.4 - - 12.2 0.2 4.2 - - 1.2 6.2 - 7.2 0.4 - - 0.4



Red Creek (Burwood) - - - - - - - - 2.6 - - - - 1.4 - 2.0 0.2 - - 0.4 4.4 0.6 - - - - - - - -
Regency Park - - - - - - - - 0.2 0.2 0.4 0.2 - 1.4 0.8 0.2 - 0.8 3.0 0.2 3.4 0.8 1.6 0.2 - - - - - -
Rosslyn Park (Seaview) - - - - - - - - 0.6 0.6 0.4 - - 4.8 2.0 1.0 - 0.2 2.0 0.4 5.2 5.6 2.6 - - - - - - -
Sellicks Beach







0.6 0.6


1.8 0.8 3.6

2.4 4.0
5.4







Uraidla








3.0


10.2 2.2



3.0 7.0 9.4







Uraidla (Sutton Creek) - - - - - - - - 1.0 1.8 0.6 - - 8.6 0.6 0.6 - 0.2 1.0 0.6 5.4 9.0 1.2 - 0.2 - - - - -
Verdun - - - - - - - - 1.6 1.4 1.2 - - 7.2 1.0 1.2 - - 0.2 0.4 1.8 5.8 2.4 - - - - 0.2 - -
Williamstown - - - - - - - - 0.4 0.8 0.2 - - 4.0 0.4 0.6 - - - - 7.8 3.2 1.8






Williamstown (South Para Reservoir) - - - - - - - - - 1.2 - - - 4.8 0.6 0.6 - 0.6 - - 6.0 2.6 3.4 0.4





Willunga - - - - - - - - 0.8 0.4 - 9.6 9.6 1.4 9.4 - 5.8






Woodside (Inverbrackie) - - - - - - - - 1.6 0.8 0.2 - - 3.8 0.6 0.6 - 0.2 - 0.2 2.2 3.2 1.2 0.2 - - 0.2 - - -
Woodside (Wicks Estate) - - - - - - - - 1.0 0.6 0.2 - - 4.0 0.6 0.6 0.2 - - 0.4 1.0 3.0 1.2 - - - - - - -
Most values are the precipitation in the 24 hours to 9 am on the day indicated. Days marked with → are part of a longer accumulation, which is shown on the final day.
Values over 100 mm have been rounded to the nearest whole millimetre.
Days marked with - have a rainfall report of zero; days left blank have no rainfall report (which often indicates no rain fell).
Rainfalls coloured
according to the amount
0 1.0 5.0 10.0 15.0 25.0 50.0 100 150 200 300 400 600 millimetres

Notes

The Monthly climate summary, generally published on the first working day of each month, lists the main features of the weather in Greater Adelaide using the most timely and accurate information available on the date of publication; it will generally not be updated. More extensive discussion of significant weather events, along with later information and data that has had greater opportunity for quality control, will be presented in the Monthly Weather Review.

This summary includes data from observing sites in or near the Greater Adelaide “Greater Capital City Statistical Area” (GCCSA). The Australian Bureau of Statistics designed the GCCSAs to “include the population within the urban area of the city, as well as people who regularly socialise, shop or work within the city, and live in small towns and rural areas surrounding the city. It is important to note that GCCSAs do not define the built up edge of the city. They provide a stable definition for these cities and are designed for the output of a range of social and economic survey data.

This statement has been prepared based on information available at 9 am on Monday 3 May 2021. Some checks have been made on the data, but it is possible that results will change as new information becomes available.

In some situations, some or all of the rainfall is in the form of hail or snow. In these cases the totals given are for the water equivalent: the depth of liquid water that results from melting any frozen precipitation. There can be significant 'undercatch' of snow in strong winds, meaning the true precipitation can be higher than that reported.

Averages for individual sites are long-term means based on observations from all available years of record, which vary widely from site to site. They are not shown for sites with less than 10 years of record, as they cannot then be calculated reliably.
The median is sometimes more representative than the mean of long-term average rain.

The Rank indicates how rainfall this time compares with the climate record for the site, based on the decile ranking (very low rainfall is in decile 1, low in decile 2 or 3, average in decile 4 to 7, high in decile 8 or 9 and very high is in decile 10).
The Fraction of average shows how much rain has fallen this time as a percentage of the long-term mean.

Where temperature area averages are mentioned, they are derived from the ACORN-SAT dataset.

Further information

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