Annual mean 23°C · wettest around March · prevailing wind N
Warmest
26.9 °C
Coldest
24.0 °C
Wettest
80%
Windiest
4.2 m/s
Prevailing
N
3.5 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 Santa Rosa over the whole year is 23°C. April is the hottest month, with highs of about 27°C; August is the coldest, with lows of about 19°C. The rainy (wet) season in Santa Rosa runs from January to April, peaking in March with a 76% chance of rain on a given day. The dry season is May to December; June is the driest month, at 30%. Winds in Santa Rosa are highest in August, averaging 2.8 m/s (10 km/h), and lightest in March, at 2.0 m/s (7 km/h). The prevailing wind is from the N. The clearest skies in Santa Rosa come in August, when the sky is typically 71% covered; February is the cloudiest month, at 81%.
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
26°C
21°C
28°C
54%
79%
2.6 m/s
29
52
19
February
27°C
21°C
28°C
57%
81%
2.2 m/s
25
44
18
March
27°C
22°C
29°C
76%
81%
2.0 m/s
25
41
18
April
27°C
21°C
29°C
64%
77%
2.1 m/s
25
43
19
May
27°C
21°C
28°C
50%
76%
2.1 m/s
29
46
19
June
25°C
20°C
26°C
30%
74%
2.4 m/s
41
52
24
July
24°C
19°C
24°C
31%
75%
2.7 m/s
53
47
29
August
24°C
19°C
24°C
31%
71%
2.8 m/s
60
48
30
September
25°C
19°C
24°C
32%
75%
2.7 m/s
61
48
30
October
25°C
19°C
25°C
47%
78%
2.6 m/s
59
49
26
November
25°C
20°C
26°C
52%
77%
2.5 m/s
56
52
24
December
26°C
21°C
26°C
45%
79%
2.4 m/s
41
57
20
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 24°C at their warmest in August, its coolest month, and 27°C in April, its warmest; the coolest hours of the day run from 19°C to 22°C through the year, and the average temperature over the year is 23°C around the clock. Rain is most likely around March 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 25°CLow 19°CRain 31%
Winter in Santa Rosa has typical daily highs of about 25°C and lows of about 19°C, with a 31% chance of rain on a given day.
Santa Rosa weather in springSeptember to November
High 25°CLow 19°CRain 44%
Spring in Santa Rosa has typical daily highs of about 25°C and lows of about 19°C, with a 44% chance of rain on a given day.
Santa Rosa weather in summerDecember to February
High 26°CLow 21°CRain 52%
Summer in Santa Rosa has typical daily highs of about 26°C and lows of about 21°C, with a 52% chance of rain on a given day.
Santa Rosa weather in autumnMarch to May
High 27°CLow 21°CRain 63%
Autumn in Santa Rosa has typical daily highs of about 27°C and lows of about 21°C, with a 63% chance of rain on a given day.
When is the rainy season in Santa Rosa?
The rainy (wet) season in Santa Rosa runs from January to April, peaking in March with a 76% chance of rain on a given day. The dry season is May to December; June is the driest month, at 30%.
What time of year is Santa Rosa windiest?
Winds in Santa Rosa are highest in August, averaging 2.8 m/s (10 km/h), and lightest in March, at 2.0 m/s (7 km/h). The prevailing wind is from the N.
What is the average temperature in Santa Rosa year round?
The average temperature in Santa Rosa over the whole year is 23°C. April is the hottest month, with highs of about 27°C; August is the coldest, with lows of about 19°C.