Annual mean 22°C · wettest around October · prevailing wind E
Warmest
32.3 °C
Coldest
19.5 °C
Wettest
83%
Windiest
3.4 m/s
Prevailing
E
2.7 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 Santa Rosa over the whole year is 22°C. January is the hottest month, with highs of about 31°C; July is the coldest, with lows of about 13°C. Santa Rosa has no sharply defined rainy season: the chance of rain on a given day runs from 69% in June, the driest month, to 80% in October, the wettest. Winds in Santa Rosa are highest in August, averaging 2.5 m/s (9 km/h), and lightest in April, at 1.7 m/s (6 km/h). The prevailing wind is from the E. The clearest skies in Santa Rosa come in December, when the sky is typically 47% covered; May is the cloudiest month, at 64%.
Month by month Santa Rosa 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
31°C
24°C
34°C
76%
52%
1.9 m/s
6
33
1
February
31°C
23°C
33°C
78%
50%
1.9 m/s
11
37
3
March
29°C
22°C
31°C
78%
51%
1.8 m/s
22
48
6
April
26°C
19°C
27°C
80%
54%
1.7 m/s
46
49
20
May
21°C
16°C
22°C
76%
64%
1.9 m/s
62
27
48
June
20°C
14°C
19°C
69%
60%
2.1 m/s
56
22
57
July
20°C
13°C
19°C
72%
54%
2.2 m/s
56
26
54
August
22°C
15°C
21°C
72%
49%
2.5 m/s
57
28
51
September
24°C
17°C
24°C
74%
54%
2.4 m/s
53
32
38
October
26°C
19°C
27°C
80%
63%
2.3 m/s
49
42
23
November
28°C
20°C
29°C
80%
52%
1.9 m/s
31
49
11
December
30°C
22°C
32°C
79%
47%
1.7 m/s
13
42
4
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 Santa Rosa weather by season
Year round, Santa Rosa has days of about 20°C at their warmest in June, its coolest month, and 31°C in January, its warmest; the coolest hours of the day run from 13°C to 24°C through the year, and the average temperature over the year is 22°C around the clock. Rain is most likely around October and least likely around June. 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.
Santa Rosa weather in winterJune to August
High 21°CLow 14°CRain 71%
Winter in Santa Rosa has typical daily highs of about 21°C and lows of about 14°C, with a 71% chance of rain on a given day.
Santa Rosa weather in springSeptember to November
High 26°CLow 19°CRain 78%
Spring in Santa Rosa has typical daily highs of about 26°C and lows of about 19°C, with a 78% chance of rain on a given day.
Santa Rosa weather in summerDecember to February
High 31°CLow 23°CRain 77%
Summer in Santa Rosa has typical daily highs of about 31°C and lows of about 23°C, with a 77% chance of rain on a given day.
Santa Rosa weather in autumnMarch to May
High 25°CLow 19°CRain 78%
Autumn in Santa Rosa has typical daily highs of about 25°C and lows of about 19°C, with a 78% chance of rain on a given day.
When is the rainy season in Santa Rosa?
Santa Rosa has no sharply defined rainy season: the chance of rain on a given day runs from 69% in June, the driest month, to 80% in October, the wettest.
What time of year is Santa Rosa windiest?
Winds in Santa Rosa are highest in August, averaging 2.5 m/s (9 km/h), and lightest in April, at 1.7 m/s (6 km/h). The prevailing wind is from the E.
What is the average temperature in Santa Rosa year round?
The average temperature in Santa Rosa over the whole year is 22°C. January is the hottest month, with highs of about 31°C; July is the coldest, with lows of about 13°C.