Annual mean 11°C · wettest around November · prevailing wind SW
Warmest
22.8 °C
Coldest
5.9 °C
Wettest
29%
Windiest
3.4 m/s
Prevailing
SW
2.8 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Sumner over the whole year is 11°C. July is the hottest month, with highs of about 24°C; February is the coldest, with lows of about 3°C. The rainy (wet) season in Sumner runs from October to April, peaking in November with a 31% chance of rain on a given day. The dry season is May to September; July is the driest month, at 7%. Winds in Sumner are highest in February, averaging 2.5 m/s (9 km/h), and lightest in September, at 2.0 m/s (7 km/h). The prevailing wind is from the SW. The clearest skies in Sumner come in July, when the sky is typically 37% covered; December is the cloudiest month, at 75%.
Month by month Sumner climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
7°C
4°C
4°C
30%
74%
2.1 m/s
1
0
27
February
7°C
3°C
3°C
26%
73%
2.5 m/s
0
0
26
March
10°C
4°C
6°C
25%
64%
2.4 m/s
4
0
45
April
13°C
7°C
9°C
23%
59%
2.5 m/s
14
0
67
May
17°C
10°C
14°C
16%
56%
2.3 m/s
43
3
83
June
20°C
13°C
17°C
16%
53%
2.3 m/s
66
9
80
July
24°C
15°C
21°C
7%
37%
2.2 m/s
86
23
66
August
23°C
15°C
22°C
11%
39%
2.1 m/s
83
27
62
September
19°C
12°C
18°C
18%
51%
2.0 m/s
75
8
80
October
14°C
9°C
12°C
27%
59%
2.1 m/s
27
1
78
November
9°C
6°C
7°C
31%
69%
2.2 m/s
4
0
47
December
7°C
4°C
3°C
29%
75%
2.2 m/s
0
0
23
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Sumner weather by season
Year round, Sumner has days of about 7°C at their warmest in December, its coolest month, and 24°C in July, its warmest; the coolest hours of the day run from 3°C to 15°C through the year, and the average temperature over the year is 11°C around the clock. Rain is most likely around November and least likely around July. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Sumner weather in winterDecember to February
High 7°CLow 4°CRain 28%
Winter in Sumner has typical daily highs of about 7°C and lows of about 4°C, with a 28% chance of rain on a given day.
Sumner weather in springMarch to May
High 13°CLow 7°CRain 22%
Spring in Sumner has typical daily highs of about 13°C and lows of about 7°C, with a 22% chance of rain on a given day.
Sumner weather in summerJune to August
High 22°CLow 14°CRain 11%
Summer in Sumner has typical daily highs of about 22°C and lows of about 14°C, with a 11% chance of rain on a given day.
Sumner weather in autumnSeptember to November
High 14°CLow 9°CRain 25%
Autumn in Sumner has typical daily highs of about 14°C and lows of about 9°C, with a 25% chance of rain on a given day.
When is the rainy season in Sumner?
The rainy (wet) season in Sumner runs from October to April, peaking in November with a 31% chance of rain on a given day. The dry season is May to September; July is the driest month, at 7%.
What time of year is Sumner windiest?
Winds in Sumner are highest in February, averaging 2.5 m/s (9 km/h), and lightest in September, at 2.0 m/s (7 km/h). The prevailing wind is from the SW.
What is the average temperature in Sumner year round?
The average temperature in Sumner over the whole year is 11°C. July is the hottest month, with highs of about 24°C; February is the coldest, with lows of about 3°C.