Annual mean 20°C · wettest around October · prevailing wind N
Warmest
30.1 °C
Coldest
18.4 °C
Wettest
58%
Windiest
3.0 m/s
Prevailing
N
2.6 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 Santa Rosa over the whole year is 20°C. January is the hottest month, with highs of about 30°C; July is the coldest, with lows of about 11°C. Santa Rosa has no sharply defined rainy season: the chance of rain on a given day runs from 49% in July, the driest month, to 63% in October, the wettest. Winds in Santa Rosa are highest in October, averaging 2.2 m/s (8 km/h), and lightest in March, at 1.7 m/s (6 km/h). The prevailing wind is from the N. The clearest skies in Santa Rosa come in February, when the sky is typically 51% covered; May is the cloudiest month, at 70%.
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
30°C
22°C
32°C
49%
52%
2.0 m/s
17
58
4
February
29°C
20°C
31°C
57%
51%
1.8 m/s
25
58
7
March
28°C
19°C
29°C
56%
56%
1.7 m/s
32
61
11
April
25°C
17°C
25°C
57%
57%
1.8 m/s
60
51
29
May
21°C
14°C
20°C
57%
70%
1.8 m/s
70
22
59
June
19°C
13°C
18°C
52%
69%
1.9 m/s
61
18
64
July
19°C
11°C
18°C
49%
63%
1.9 m/s
57
19
61
August
21°C
13°C
19°C
53%
54%
2.1 m/s
61
21
60
September
23°C
15°C
23°C
53%
59%
2.1 m/s
64
31
50
October
25°C
17°C
25°C
63%
69%
2.2 m/s
63
42
36
November
27°C
19°C
27°C
59%
62%
2.1 m/s
47
57
20
December
29°C
21°C
30°C
59%
55%
2.1 m/s
28
59
9
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 19°C at their warmest in June, its coolest month, and 30°C in January, its warmest; the coolest hours of the day run from 11°C to 22°C through the year, and the average temperature over the year is 20°C around the clock. Rain is most likely around October 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.
Santa Rosa weather in winterJune to August
High 20°CLow 12°CRain 51%
Winter in Santa Rosa has typical daily highs of about 20°C and lows of about 12°C, with a 51% chance of rain on a given day.
Santa Rosa weather in springSeptember to November
High 25°CLow 17°CRain 58%
Spring in Santa Rosa has typical daily highs of about 25°C and lows of about 17°C, with a 58% chance of rain on a given day.
Santa Rosa weather in summerDecember to February
High 29°CLow 21°CRain 55%
Summer in Santa Rosa has typical daily highs of about 29°C and lows of about 21°C, with a 55% chance of rain on a given day.
Santa Rosa weather in autumnMarch to May
High 25°CLow 17°CRain 57%
Autumn in Santa Rosa has typical daily highs of about 25°C and lows of about 17°C, with a 57% 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 49% in July, the driest month, to 63% in October, the wettest.
What time of year is Santa Rosa windiest?
Winds in Santa Rosa are highest in October, averaging 2.2 m/s (8 km/h), and lightest in March, at 1.7 m/s (6 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 20°C. January is the hottest month, with highs of about 30°C; July is the coldest, with lows of about 11°C.