Perth Monthly Climate Summary: June 2006
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Perth's top 10 driest Junes
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| Season |
Rainfall (mm) |
Rain Days |
Ranking |
| 2006 |
24.6
|
5
|
1 |
|
1877
|
54.9
|
10
|
2 |
|
1993
|
64.4
|
10
|
3 |
|
1989
|
68.0
|
10
|
4 |
|
1958
|
70.4
|
11
|
5 |
|
2001
|
71.6
|
12
|
6 |
|
1977
|
74.6
|
13
|
7 |
|
1893
|
81.8
|
9
|
8 |
|
1976
|
84.8
|
9
|
9 |
|
1955
|
87.6
|
10
|
10 |
Six-monthly rainfall - record low: The total rainfall for January to June this year was 134.6 mm, making it the driest start to the year on record. The previous record was 188.0 mm in 1972. The average is 384 mm.
Two-monthly rainfall - record low: The total rainfall for May to June this year was 55.6 mm, making it the driest May-June period on record. The previous record was 118.6 mm in 1949. The average is 299 mm.
Mean daily maximum temperature - well above average:
Perth's mean daily maximum temperature in June was 20.3°C, compared
with the average of 19.1°C. This was the highest mean daily maximum
temperature for June since the 20.3°C in 1985 and the equal third
warmest on record. Daily maxima ranged from a cool 15.8°C on the 28th
to a warm 24.1°C on the 5th.
Mean daily minimum temperature - record low: Perth's
mean daily minimum temperature in June was 5.8°C, compared with the
average of 8.9°C. This was the lowest mean daily minimum temperature
recorded for June at the official Perth metropolitan observation site
at Mt Lawley since records commenced there in 1994. The previous record
was 6.9°C in 2001. Minima ranged from a very cold −0.7°C on the
17th, the lowest ever daily minimum temperature recorded at the Mt Lawley
site, to a mild 11.5°C on the 20th. The previous June record low minimum
was 1.2°C on 19 June 2003 and 2 June 2004 whilst the record minimum
for any month had been 0.0°C on 15 July 1997 and 27 July 1998.
Cold nights - new record: Perth recorded 13 cold nights
this June with a minimum temperature of 5 degrees or less, the most ever
for the Mt Lawley site. The previous record was 12 in 2001.
Mean daily sunshine hours - new record: Perth's mean daily sunshine hours in June was 7.4 hours, the most sunshine for June on record. The previous record was 7.3 hours in 2001, compared with the average of 5.7 hours.
| June monthly mean temperature and sunshine | |||||||
|---|---|---|---|---|---|---|---|
| Element |
2006 |
Long- term Average |
Highest |
Year |
Lowest |
Year | Records Commence |
| Maximum Temperature (°C) |
20.3
|
19.1
|
20.6
|
1983
|
15.9
|
1898
|
1897
|
| Minimum Temperature (°C) |
5.8
|
8.9
|
12.8
|
1964
|
6.9
|
2001
|
1897
|
| Sunshine (hours per day) |
7.4
|
5.7
|
7.3
|
2001
|
2.9
|
1945
|
1898
|
| June rainfall and rain days | |||||||
| Element | 2006 | Long-term Average | Highest | Year | Lowest | Year | Records Commence |
|
Rainfall (mm)
|
24.6
|
179
|
476.1
|
1945
|
54.9
|
1877
|
1876
|
|
Rain days
|
5
|
17
|
27
|
1918/70
|
9
|
1893/1976
|
1876
|
| June daily extremes | |||||
|---|---|---|---|---|---|
| Element | 2006 | Date | Extreme | Date |
Records Commence |
|
Highest daily maximum (°C)
|
24.1
|
05/06/2006
|
28.1
|
05/06/1975
|
1897
|
|
Lowest daily maximum (°C)
|
15.8
|
28/06/2006
|
8.8
|
26/06/1956
|
1897
|
|
Highest daily minimum (°C)
|
11.5
|
20/06/2006
|
18.7
|
12/06/1988
|
1897
|
|
Lowest daily minimum (°C)
|
−0.7
|
17/06/2006
|
1.2
|
*Twice
|
1897
|
|
Wettest 24 hours to 9am (mm)
|
12.4
|
28/06/2006
|
99.1
|
10/06/1920
|
1876
|
*Denotes the lowest minimum temperature for June on record on the following dates: 19 June 2003 and 2 June 2004.
Climate of Perth in July
July is one of Perth's coldest and wettest months. Many days are cloudy, wet and windy, though there are generally some sunny days with light winds and cold nights.
| July monthly mean temperatures and sunshine | ||||||
|---|---|---|---|---|---|---|
| Element | Average | Highest | Year | Lowest | Year |
Records |
| Maximum temperature (°C) |
18.3
|
19.9
|
1976/77
|
15.7
|
1910
|
1897
|
| Minimum temperature (°C) |
8.0
|
11.4
|
1921
|
5.3
|
1997
|
1897
|
|
Sunshine |
6.1
|
7.5
|
1918
|
3.2
|
1926
|
1898
|
| July rainfall and rain days | ||||||
|
Element
|
Average
|
Highest
|
Year
|
Lowest
|
Year
|
Records Commence
|
| Rainfall (mm) |
171
|
425.1
|
1958
|
61.5
|
1876
|
1876
|
| Rain days |
17
|
29
|
1946
|
6
|
1918
|
1876
|
|
July daily extremes
|
|||||
|---|---|---|---|---|---|
|
Element
|
Highest
|
Date
|
Lowest
|
Date
|
Records Commence
|
|
Maximum temperature (°C)
|
26.3
|
†Twice
|
10.5
|
09/07/1906
|
1897
|
|
Minimum temperature (°C)
|
16.1
|
12/07/1898
|
0.0
|
††Twice
|
1897
|
|
Rainfall 24 hours to 9am (mm)
|
95.0
|
29/07/1987
|
n/a
|
n/a
|
1876
|
†Denotes the highest maximum temperature for July on record on the
following dates: 17 & 18 July 1976.
††Denotes the lowest minimum temperature for July on record
on the following dates: 15 July 1997 and 27 July 1998.
Warm days in July: On average, Perth can expect six days when the maximum temperature is 20 degrees or more. The greatest number of such days in July was 14 days in 1976 and 1977. Last July, Perth recorded eight such days.
Cold days in July: On average, Perth can expect two days when the maximum temperature is 15 degrees or less. The greatest number of such days in July was 12 in 1916. Last July, Perth recorded two such days.
Cold nights in July: Perth has a mean of eight cold nights when the minimum temperature is 5 degrees or lower. The greatest number of such nights was 16 in 1998. Last July, Perth recorded ten such nights.
|
July top 10 warmest days
|
July top 10 coldest days
|
||||
|---|---|---|---|---|---|
|
Position
|
Date
|
Max
Temp °C |
Position
|
Date
|
Max
Temp °C |
|
1
|
17 July 1976
|
26.3
|
1
|
09 July 1906
|
10.5
|
|
1
|
18 July 1976
|
26.3
|
2
|
12 July 1899
|
10.6
|
|
3
|
21 July 1994
|
25.8
|
3
|
16 July 1909
|
11.2
|
|
4
|
24 July 1999
|
25.4
|
4
|
17 July 1925
|
11.3
|
|
5
|
19 July 1976
|
25.2
|
4
|
12 July 1927
|
11.3
|
|
6
|
16 July 1976
|
25.0
|
6
|
29 July 1975
|
11.4
|
|
7
|
31 July 1977
|
24.8
|
7
|
04 July 1939
|
11.5
|
|
7
|
26 July 2001
|
24.8
|
7
|
21 July 1978
|
11.5
|
|
9
|
21 July 1921
|
24.7
|
9
|
30 July 1948
|
11.6
|
| 10 | 14 July 1950 | 24.6 | 10 | 09 July 1905 | 11.7 |
| July top 10 warmest nights |
June top 10 coldest nights
|
||||
|---|---|---|---|---|---|
|
Position |
Date |
Min
Temp °C |
Position |
Date |
Min
Temp °C |
|
1 |
12 July 1898
|
16.1
|
1 |
15 July 1997
|
0.0
|
|
2 |
03 July 1915
|
15.7
|
1 |
27 July 1998
|
0.0
|
|
2
|
07 July 1928
|
15.7
|
3 |
29 July 1998
|
0.1
|
|
4 |
18 July 1919
|
15.6
|
4
|
11 July 1997
|
0.2
|
|
4 |
19 July 1919
|
15.6
|
4 |
07 July 2005
|
0.2
|
|
4
|
15 July 1978
|
15.6
|
4
|
12 July 2005
|
0.2
|
|
7 |
17 July 1908
|
15.5
|
7
|
07 July 1998
|
0.3
|
|
7
|
02 July 1941
|
15.5
|
8 |
08 July 1997
|
0.4
|
| 9 | 02 July 1921 | 15.4 | 8 | 26 July 2004 | 0.4 |
|
9 |
30 July 2001
|
15.4
|
10 |
18 July 1997
|
0.5
|
| - | - | - | 10 | 06 July 2005 | 0.5 |
Note: Official Perth observations have been recorded at several different sites with varying instrumentation over the years, and these changes can affect the continuity of the climate record. For the current Mt Lawley site, the most significant changes of this kind relate to temperature and rain days. For that reason, current mean temperature and rain-day data quoted here are based only on readings from the Mt Lawley site, which commenced observations in 1993. Sunshine recordings are from Perth Airport and for similar reasons current means use only Perth Airport data, which commenced in 1993.
Further information:
John Relf (JR) and John Cramb Western Australia Climate Services Centre
on, tel: (08) 9263 2222, office hours.