Best Time to Visit San Bernardino
Best time: Jun, Jul, May, Aug.
Jul is warmest (35.5°C high); Feb is rainiest (66 mm).
San Bernardino weather by month
| Month | High °C | Low °C | Rain mm | Sun hrs |
|---|---|---|---|---|
| Jan | 19.3 | 5.1 | 64 | 4.7 |
| Feb | 20.6 | 6.2 | 66 | 5.6 |
| Mar | 21.6 | 7.4 | 59 | 7.9 |
| Apr | 25.1 | 9.1 | 20 | 9.8 |
| May | 27.5 | 12 | 8 | 11 |
| Jun | 31.9 | 14.6 | 2 | 11.9 |
| Jul | 35.5 | 17 | 2 | 11.6 |
| Aug | 35.5 | 17.4 | 5 | 10.9 |
| Sep | 33.1 | 15.7 | 9 | 9.1 |
| Oct | 28.6 | 11.8 | 10 | 7 |
| Nov | 23.5 | 7.1 | 26 | 5.4 |
| Dec | 19.8 | 4.5 | 37 | 4.5 |
Average high temperature
Best months by activity
Overall: JunJulMayAug
Beaches: JunJulAugSep
Hiking: MayAprOctJun
Sightseeing: JunMaySepApr
San Bernardino quick facts
What to pack
Mild year-round — pack layers and a light jacket.
Frequently asked questions
When is the best time to visit San Bernardino?
Jun, Jul, May, Aug.
What is the rainiest month?
Feb, about 66 mm.
What is the warmest month?
Jul, with average highs of 35.5°C.
Where to stay
See San Bernardino hotels · Book San Bernardino tours & activities
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Climate data: Open-Meteo Historical (ERA5), 1991–2020 climate normals.
Licensed under CC BY 4.0.
Open-Meteo.