Annual mean 23°C · wettest around November · prevailing wind E
Warmest
32.0 °C
Coldest
20.8 °C
Wettest
91%
Windiest
3.7 m/s
Prevailing
E
2.9 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 San Bernardino over the whole year is 23°C. January is the hottest month, with highs of about 32°C; July is the coldest, with lows of about 14°C. San Bernardino has no sharply defined rainy season: the chance of rain on a given day runs from 59% in June, the driest month, to 80% in November, the wettest. Winds in San Bernardino are highest in August, averaging 2.6 m/s (9 km/h), and lightest in February, at 1.8 m/s (6 km/h). The prevailing wind is from the E. The clearest skies in San Bernardino come in August, when the sky is typically 43% covered; May is the cloudiest month, at 62%.
Month by month San Bernardino 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
32°C
24°C
34°C
77%
53%
1.9 m/s
4
29
1
February
31°C
23°C
34°C
78%
48%
1.8 m/s
8
33
2
March
30°C
22°C
32°C
80%
51%
1.8 m/s
17
42
5
April
27°C
20°C
29°C
79%
50%
1.8 m/s
34
50
14
May
23°C
16°C
23°C
68%
62%
1.9 m/s
61
33
43
June
21°C
15°C
20°C
59%
58%
2.2 m/s
58
28
52
July
22°C
14°C
20°C
61%
50%
2.2 m/s
54
32
48
August
24°C
15°C
22°C
60%
43%
2.6 m/s
55
34
45
September
26°C
18°C
25°C
71%
48%
2.5 m/s
49
37
33
October
28°C
20°C
28°C
74%
58%
2.4 m/s
36
43
17
November
29°C
21°C
31°C
80%
49%
2.0 m/s
22
48
7
December
31°C
23°C
33°C
75%
49%
1.9 m/s
11
39
2
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 San Bernardino weather by season
Year round, San Bernardino has days of about 21°C at their warmest in June, its coolest month, and 32°C in January, its warmest; the coolest hours of the day run from 14°C to 24°C through the year, and the average temperature over the year is 23°C around the clock. Rain is most likely around November 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.
San Bernardino weather in winterJune to August
High 22°CLow 15°CRain 60%
Winter in San Bernardino has typical daily highs of about 22°C and lows of about 15°C, with a 60% chance of rain on a given day.
San Bernardino weather in springSeptember to November
High 28°CLow 20°CRain 75%
Spring in San Bernardino has typical daily highs of about 28°C and lows of about 20°C, with a 75% chance of rain on a given day.
San Bernardino weather in summerDecember to February
High 31°CLow 23°CRain 77%
Summer in San Bernardino has typical daily highs of about 31°C and lows of about 23°C, with a 77% chance of rain on a given day.
San Bernardino weather in autumnMarch to May
High 26°CLow 19°CRain 75%
Autumn in San Bernardino has typical daily highs of about 26°C and lows of about 19°C, with a 75% chance of rain on a given day.
When is the rainy season in San Bernardino?
San Bernardino has no sharply defined rainy season: the chance of rain on a given day runs from 59% in June, the driest month, to 80% in November, the wettest.
What time of year is San Bernardino windiest?
Winds in San Bernardino are highest in August, averaging 2.6 m/s (9 km/h), and lightest in February, at 1.8 m/s (6 km/h). The prevailing wind is from the E.
What is the average temperature in San Bernardino year round?
The average temperature in San Bernardino over the whole year is 23°C. January is the hottest month, with highs of about 32°C; July is the coldest, with lows of about 14°C.