Climate normals · 1970–2000
San Bernardino Climate
San Bernardino is a city in United States (CA) with a population of about 216,108. Its average annual temperature is 18.6°C (65°F), with roughly 310 mm of rain per year.
18.6°C
Avg Temp
310
Precip (mm/yr)
Aug
Hottest Month
Jan
Coldest Month
San Bernardino Climate
San Bernardino has an average annual temperature of 18.6°C (65°F) and receives about 310 mm of precipitation per year. The warmest month is August and the coldest is January. Figures are 1970–2000 climate normals.
18.6°C
Avg Temp
310
Precip (mm/yr)
Aug
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 12° / 54° | 64 mm |
| February | 13° / 56° | 66 mm |
| March | 14° / 58° | 60 mm |
| April | 17° / 62° | 21 mm |
| May | 20° / 67° | 8 mm |
| June | 23° / 73° | 2 mm |
| July | 26° / 79° | 2 mm |
| August | 26° / 79° | 5 mm |
| September | 24° / 76° | 9 mm |
| October | 20° / 68° | 10 mm |
| November | 15° / 60° | 26 mm |
| December | 12° / 54° | 37 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit San Bernardino
The most comfortable months to visit San Bernardino are typically October, May and June, when temperatures are mildest and rainfall is relatively low. The hottest month is August (around 35°C high). The coldest is January (near 5°C low). February is usually the wettest month.
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Frequently Asked Questions
The most comfortable months to visit San Bernardino are typically October, May and June, when temperatures are mildest and rainfall is relatively low (1970–2000 climate normals).
San Bernardino, United States has an average annual temperature of 18.6°C and about 310 mm of precipitation per year. The warmest month is August and the coldest is January.
In August, the hottest month, daily highs in San Bernardino average about 35°C (96°F).
Monthly climate normals (1970–2000) sampled from WorldClim 2.1 at ~9 km resolution. Humidity derived from vapor pressure. City coordinates and population from GeoNames.