Perth Monthly Climate Summary: October 2006
Dry and warm October for Perth
Wednesday 1 November, 2006
October Rainfall - below average: The city received
18.6 mm of rainfall over 7 days in October compared with the average of
53 mm over 9 days. Last October Perth registered 52.8 mm on 16 days.
Ten-month rainfall - record low: The total rainfall for
January to October for Perth this year was 445.4 mm on 87 days, making
it the driest such period on record for Perth. The previous driest was
458.5 mm on 94 days in 1914. The average is 824 mm.
|
Perth's top 10 driest years to date
(January to October total) |
|||
|
Season
|
Rainfall (mm)
|
Rain Days
|
Ranking
|
|
2006
|
445.4
|
87
|
1
|
|
1914
|
458.5
|
94
|
2
|
|
1940
|
493.2
|
89
|
3
|
|
1877
|
511.6
|
98
|
4
|
|
1979
|
529.8
|
100
|
5
|
|
1969
|
531.2
|
79
|
6
|
|
1894
|
559.7
|
95
|
7
|
|
1959
|
567.4
|
106
|
8
|
|
1911
|
597.3
|
96
|
9
|
|
1881
|
580.4
|
86
|
10
|
Mean daily maximum temperature - above average: Perth's
mean daily maximum temperature in October was 24.1°C, making it the
highest mean daily maximum temperature for October since 1969 and the
equal second warmest on record. The October average is 22.7°C. Daily
maxima ranged from a cool 17.8°C on the 11th to a warm 31.9°C
on the 28th, the warmest daily maximum temperature for October for six
years.
Mean daily minimum temperature - near average: Perth's
mean daily minimum temperature in October was 11.9°C, compared with
the average of 11.1°C. Daily minima ranged from a cool 5.4°C on
the 5th to a warm 20.2°C on the 21st, the warmest daily minimum temperature
in October for fifteen years and the sixth warmest October night on record.
| October monthly mean temperature and sunshine | |||||||
|---|---|---|---|---|---|---|---|
| Element |
2006 |
Long- term Average |
Highest |
Year |
Lowest |
Year | Records Commence |
| Maximum Temperature (°C) |
24.1
|
22.7
|
25.8
|
1969
|
18.8
|
1924
|
1897
|
| Minimum Temperature (°C) |
11.9
|
11.1
|
14.2
|
1969
|
9.3
|
1910
|
1897
|
| Sunshine (hours per day) |
9.8
|
9.6
|
10.9
|
2000
|
5.5
|
1898
|
1898
|
| October rainfall and rain days | |||||||
| Element | 2006 | Long-term Average | Highest | Year | Lowest | Year | Records Commence |
|
Rainfall (mm)
|
18.6
|
53
|
199.9
|
1890
|
1.0
|
1969
|
1876
|
|
Rain days
|
7
|
9
|
22
|
1898
|
1
|
1969
|
1876
|
| October daily extremes | |||||
|---|---|---|---|---|---|
| Element | 2006 | Date | Extreme | Date |
Records Commence |
|
Highest daily maximum (°C)
|
31.9
|
28/10/2006
|
37.3
|
29/10/1967
|
1897
|
|
Lowest daily maximum (°C)
|
17.8
|
11/10/2006
|
11.9
|
08/10/1932
|
1897
|
|
Highest daily minimum (°C)
|
20.2
|
21/10/2006
|
22.2
|
29/10/1979
|
1897
|
|
Lowest daily minimum (°C)
|
5.4
|
05/10/2006
|
2.2
|
06/10/1994
|
1897
|
|
Wettest 24 hours to 9am (mm)
|
6.6
|
12/10/2006
|
68.2
|
18/10/1995
|
1876
|
Climate of Perth in November
November days in Perth are generally sunny and either mild or warm. A few hot days occur, usually in the latter part of the month. The general springtime decline in rainfall continues with an average of 22 mm over six days in November in Perth.
| November monthly mean temperatures and sunshine | ||||||
|---|---|---|---|---|---|---|
| Element | Average | Highest | Year | Lowest | Year |
Records |
| Maximum temperature (°C) |
26.1
|
27.7
|
1920
|
21.5
|
1971
|
1897
|
| Minimum temperature (°C) |
14.1
|
16.9
|
1982
|
11.9
|
1954
|
1897
|
|
Sunshine |
10.7
|
11.9
|
2002
|
5.1
|
1965
|
1898
|
| November rainfall and rain days | ||||||
|
Element
|
Average
|
Highest
|
Year
|
Lowest
|
Year
|
Records Commence
|
| Rainfall (mm) |
22
|
73.2
|
1984
|
0.0
|
1891
|
1876
|
| Rain days |
6
|
14
|
3 years
|
0
|
1891
|
1876
|
|
November daily extremes
|
|||||
|---|---|---|---|---|---|
|
Element
|
Highest
|
Date
|
Lowest
|
Date
|
Records Commence
|
|
Maximum temperature (°C)
|
40.3
|
** Twice
|
15.8
|
02/11/1919
|
1897
|
|
Minimum temperature (°C)
|
25.1
|
24/11/1920
|
5.0
|
18/11/2004
|
1897
|
|
Rainfall 24 hours to 9am (mm)
|
39.1
|
29/11/1956
|
n/a
|
n/a
|
1876
|
** Denotes the highest daily
maximum temperature recorded on 11 November 2003 and 24 November 1913.
Hot days in November: On average, Perth can expect four
hot days when the maximum temperature is 32 degrees or higher. The record
of nine such days was set in 1940 whilst last November Perth recorded
two such days.
Earliest 40-degree
day of the season: The earliest 40-degree maximum temperature
of the season occurred on 11 November 2003, when 40.3 degrees was recorded.
A maximum temperature of 40 degrees or higher has only occurred three
times in November in Perth since records began.
|
November top 10 hottest days
|
November top 10 coolest days
|
||||
|---|---|---|---|---|---|
|
Position
|
Date
|
Max
temp°C |
Position
|
Date
|
Max
temp°C |
|
1
|
24 November 1913
|
40.3
|
1
|
02 November 1919
|
15.8
|
|
1
|
11 November 2003
|
40.3
|
2
|
12 November 1976
|
15.9
|
|
3
|
22 November 1978
|
40.1
|
2
|
16 November 1983
|
15.9
|
|
4
|
24 November 1962
|
39.9
|
4
|
08 November 1995
|
16.0
|
|
5
|
26 November 1972
|
39.6
|
5
|
10 November 1971
|
16.1
|
|
6
|
15 November 1942
|
39.5
|
6
|
01 November 1904
|
16.2
|
|
7
|
01 November 1936
|
39.4
|
6
|
03 November 1953
|
16.2
|
|
7
|
24 November 1936
|
39.4
|
8
|
03 November 1969
|
16.3
|
|
9
|
30 November 1925
|
38.9
|
9
|
13 November 1922
|
16.4
|
| 10 |
22 November 1977
|
38.7
|
9 |
15 November 1948
|
16.4
|
|
November top 10 warmest nights
|
November top 10 coldest nights
|
||||
|---|---|---|---|---|---|
|
Position
|
Date
|
Min
temp°C |
Position
|
Date
|
Min
temp°C |
|
1
|
24 November 1920
|
25.1
|
1
|
18 November 2004
|
5.0
|
|
2
|
23 November 1937
|
24.5
|
2
|
01 November 1904
|
5.6
|
|
3
|
30 November 1925
|
24.4
|
2
|
02 November 2005
|
5.8
|
|
3
|
23 November 2004
|
24.4
|
4
|
01 November 1968
|
6.2
|
|
5
|
26 November 1972
|
24.3
|
4
|
06 November 2005
|
6.2
|
|
6
|
27 November 1972
|
23.7
|
6
|
03 November 1907
|
6.3
|
|
7
|
10 November 1967
|
23.6
|
7
|
02 November 1907
|
6.6
|
|
8
|
22 November 1978
|
23.5
|
7
|
03 November 1948
|
6.6
|
|
9
|
27 November 1973
|
23.4
|
9
|
07 November 1948
|
6.8
|
| 9 |
12 November 2003
|
23.4
|
10 |
02 November 1943
|
6.9
|
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 Glenn Cook Western Australia Climate Services Centre
on, tel: (08) 9263 2222, office hours.