Annual mean 14°C · wettest around March · prevailing wind SW
Warmest
24.4 °C
Coldest
11.5 °C
Wettest
66%
Windiest
4.6 m/s
Prevailing
SW
3.6 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
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 Sonoma over the whole year is 14°C. August is the hottest month, with highs of about 23°C; February is the coldest, with lows of about 7°C. The rainy (wet) season in Sonoma runs from October to May, peaking in March with a 65% chance of rain on a given day. The dry season is June to September; July is the driest month, at 21%. Winds in Sonoma are highest in June, averaging 3.7 m/s (13 km/h), and lightest in November, at 2.1 m/s (8 km/h). The prevailing wind is from the SW. The clearest skies in Sonoma come in June, when the sky is typically 19% covered; January is the cloudiest month, at 49%.
Month by month Sonoma 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
12°C
8°C
10°C
65%
49%
2.4 m/s
11
0
76
February
14°C
7°C
11°C
64%
33%
2.7 m/s
20
0
75
March
15°C
8°C
12°C
65%
43%
2.8 m/s
26
1
79
April
17°C
10°C
15°C
60%
30%
3.1 m/s
51
5
80
May
20°C
12°C
18°C
57%
28%
3.5 m/s
61
14
73
June
22°C
14°C
21°C
34%
19%
3.7 m/s
62
27
59
July
23°C
14°C
23°C
21%
22%
3.7 m/s
64
36
49
August
23°C
15°C
23°C
25%
25%
3.3 m/s
68
38
47
September
23°C
14°C
22°C
40%
24%
2.8 m/s
71
32
53
October
21°C
12°C
20°C
54%
25%
2.3 m/s
73
18
68
November
16°C
9°C
14°C
62%
33%
2.1 m/s
37
1
85
December
12°C
7°C
10°C
65%
45%
2.3 m/s
10
0
75
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 Sonoma weather by season
Year round, Sonoma has days of about 12°C at their warmest in January, its coolest month, and 23°C in August, its warmest; the coolest hours of the day run from 7°C to 15°C through the year, and the average temperature over the year is 14°C around the clock. Rain is most likely around March 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.
Sonoma weather in winterDecember to February
High 13°CLow 7°CRain 64%
Winter in Sonoma has typical daily highs of about 13°C and lows of about 7°C, with a 64% chance of rain on a given day.
Sonoma weather in springMarch to May
High 17°CLow 10°CRain 61%
Spring in Sonoma has typical daily highs of about 17°C and lows of about 10°C, with a 61% chance of rain on a given day.
Sonoma weather in summerJune to August
High 23°CLow 14°CRain 27%
Summer in Sonoma has typical daily highs of about 23°C and lows of about 14°C, with a 27% chance of rain on a given day.
Sonoma weather in autumnSeptember to November
High 20°CLow 12°CRain 52%
Autumn in Sonoma has typical daily highs of about 20°C and lows of about 12°C, with a 52% chance of rain on a given day.
When is the rainy season in Sonoma?
The rainy (wet) season in Sonoma runs from October to May, peaking in March with a 65% chance of rain on a given day. The dry season is June to September; July is the driest month, at 21%.
What time of year is Sonoma windiest?
Winds in Sonoma are highest in June, averaging 3.7 m/s (13 km/h), and lightest in November, at 2.1 m/s (8 km/h). The prevailing wind is from the SW.
What is the average temperature in Sonoma year round?
The average temperature in Sonoma over the whole year is 14°C. August is the hottest month, with highs of about 23°C; February is the coldest, with lows of about 7°C.