Annual mean 16°C · wettest around November · prevailing wind N
Warmest
28.9 °C
Coldest
10.6 °C
Wettest
29%
Windiest
6.4 m/s
Prevailing
N
5.2 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 16°C. January is the hottest month, with highs of about 29°C; July is the coldest, with lows of about 4°C. The rainy (wet) season in Santa Rosa runs from September to April, peaking in November with a 33% chance of rain on a given day. The dry season is May to August; July is the driest month, at 15%. Winds in Santa Rosa are highest in November, averaging 4.7 m/s (17 km/h), and lightest in June, at 3.2 m/s (12 km/h). The prevailing wind is from the N. The clearest skies in Santa Rosa come in February, when the sky is typically 42% covered; May is the cloudiest month, at 58%.
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
29°C
19°C
26°C
32%
43%
4.5 m/s
52
51
25
February
28°C
17°C
25°C
25%
42%
4.1 m/s
53
44
31
March
24°C
15°C
22°C
31%
44%
4.2 m/s
64
27
51
April
20°C
12°C
17°C
29%
49%
3.7 m/s
58
8
71
May
15°C
7°C
12°C
20%
58%
3.3 m/s
30
1
73
June
12°C
5°C
8°C
16%
54%
3.2 m/s
11
0
55
July
12°C
4°C
7°C
15%
57%
3.6 m/s
6
0
48
August
14°C
5°C
9°C
17%
50%
4.0 m/s
15
0
62
September
18°C
8°C
12°C
24%
50%
4.4 m/s
32
2
72
October
21°C
11°C
16°C
24%
52%
4.4 m/s
54
8
71
November
25°C
15°C
21°C
33%
46%
4.7 m/s
65
23
54
December
28°C
17°C
24°C
26%
44%
4.6 m/s
58
47
34
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 12°C at their warmest in July, its coolest month, and 29°C in January, its warmest; the coolest hours of the day run from 4°C to 19°C through the year, and the average temperature over the year is 16°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.
Santa Rosa weather in winterJune to August
High 13°CLow 5°CRain 16%
Winter in Santa Rosa has typical daily highs of about 13°C and lows of about 5°C, with a 16% chance of rain on a given day.
Santa Rosa weather in springSeptember to November
High 21°CLow 11°CRain 27%
Spring in Santa Rosa has typical daily highs of about 21°C and lows of about 11°C, with a 27% chance of rain on a given day.
Santa Rosa weather in summerDecember to February
High 28°CLow 18°CRain 28%
Summer in Santa Rosa has typical daily highs of about 28°C and lows of about 18°C, with a 28% chance of rain on a given day.
Santa Rosa weather in autumnMarch to May
High 20°CLow 11°CRain 27%
Autumn in Santa Rosa has typical daily highs of about 20°C and lows of about 11°C, with a 27% chance of rain on a given day.
When is the rainy season in Santa Rosa?
The rainy (wet) season in Santa Rosa runs from September to April, peaking in November with a 33% chance of rain on a given day. The dry season is May to August; July is the driest month, at 15%.
What time of year is Santa Rosa windiest?
Winds in Santa Rosa are highest in November, averaging 4.7 m/s (17 km/h), and lightest in June, at 3.2 m/s (12 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 16°C. January is the hottest month, with highs of about 29°C; July is the coldest, with lows of about 4°C.