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The temperatures in San Bernardino in January are quite cold with temperatures between 5°C and 18°C, warm clothes are a must.
The wather in San Bernardino in January can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.
Our weather forecast can give you a great sense of what weather to expect in San Bernardino in January 2025.
If you’re planning to visit San Bernardino in the near future, we highly recommend that you review the 14 day weather forecast for San Bernardino before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 18° / 5° | 2 | 29 | 0 | 50 mm | Good | San Bernardino in January |
| February | 18° / 5° | 2 | 26 | 0 | 55 mm | Good | San Bernardino in February |
| March | 20° / 5° | 2 | 29 | 0 | 31 mm | Good | San Bernardino in March |
| April | 23° / 7° | 1 | 29 | 0 | 23 mm | Perfect | San Bernardino in April |
| May | 26° / 9° | 0 | 31 | 0 | 7 mm | Perfect | San Bernardino in May |
| June | 31° / 12° | 0 | 30 | 0 | 2 mm | Good | San Bernardino in June |
| July | 34° / 15° | 1 | 30 | 0 | 18 mm | Ok | San Bernardino in July |
| August | 34° / 16° | 0 | 31 | 0 | 10 mm | Ok | San Bernardino in August |
| September | 32° / 14° | 0 | 30 | 0 | 7 mm | Good | San Bernardino in September |
| October | 27° / 10° | 0 | 31 | 0 | 8 mm | Perfect | San Bernardino in October |
| November | 22° / 7° | 1 | 29 | 0 | 18 mm | Good | San Bernardino in November |
| December | 17° / 4° | 3 | 28 | 0 | 63 mm | Good | San Bernardino in December |