San Bernardino, CA weather in January
January in San Bernardino: mild, with some rain. Highs 67°F, lows 41°F, rain on about 7 days. It is one of the coolest months in San Bernardino. A good month for most outdoor plans.
- Normal high
- 67°F
- Normal low
- 41°F
- Wet days
- 7
- 2.8 in total
- Muggy days
- 0
- dew point 65°F+
How January changes from start to finish
| January 1 | January 31 | |
|---|---|---|
| Normal high | 66°F | 67°F |
| Normal low | 40°F | 42°F |
| Chance of a wet day | 22% | 23% |
| Sunrise / sunset | 6:54 am / 4:50 pm | 6:47 am / 5:18 pm |
| Daylight | 9.9 h | 10.5 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Pacific Time).
A typical January day
- 6 am43°Fdew point 34°F
- 9 am51°Fdew point 36°F
- Noon63°Fdew point 34°F
- 3 pm65°Fdew point 33°F
- 6 pm56°Fdew point 36°F
- 9 pm50°Fdew point 36°F
NOAA hourly normals (local standard time) from March AFB (15 mi away); average wind 5 mph; clear or few clouds in 58% of daytime hours, mostly cloudy or overcast in 35%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F17 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more0 of 31
- Wet daysat least 0.01 in of rain or melted snow7 of 31
- Notable rainat least 0.10 in5 of 31
- Freezing nightslow 32°F or below1 of 31
Average days per January, counted from daily records for each year 1991-2020.
Rain in January
Normal precipitation is 2.8 in; a dry January brings about 0.6 in and a wet one about 3.4 in (25th and 75th percentiles). About 2 days bring half an inch or more, and about 1 an inch or more. Snow is very rare.
How January varies from year to year
- Warmest January, 1991-20202003: average high 76°F
- Coolest January1993: average high 61°F
- Wettest January1993: 11.7 in
- Driest January2003: 0.01 in
- Highest reading93°F (January 31, 2003)
- Lowest reading24°F (January 14, 2007)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
January compared with December and February
| December | January | February | |
|---|---|---|---|
| Normal high | 67°F | 67°F | 67°F |
| Normal low | 40°F | 41°F | 42°F |
| Wet days | 6 | 7 | 8 |
| Comfortable days | 15 | 17 | 13 |
| Daylight | 9.9 h | 10.2 h | 11.0 h |
Highs change by 0°F from December and 0°F into February.
Nearby alternatives in January
- Drier: Palm Springs, CA47 mi · high 71°F · 3 wet days
- Cooler: Big Bear Lake, CA24 mi · high 46°F · 7 wet days
How San Bernardino ranks in January
- Normal high58th warmest of 378 cities; 22nd of 60 in California
- Wet days93rd driest of 378
- Comfortable days22nd most of 339
What to pack for San Bernardino in January
- Layers – afternoons near 67°F but nights near 41°F
Frost in January
The last spring frost typically comes around Jan 27; in 1 year in 10 it comes after Feb 28. All frost dates for San Bernardino.
Heating and cooling
January has 347 heating degree days and 1 cooling degree days (base 65°F), 10% of the year's total heating and cooling demand.
Questions
How cold is San Bernardino in January?
The normal high is 67°F and the normal low is 41°F. From 1991 to 2020 the coldest January reading was 24°F (January 14, 2007).
Does it rain a lot in San Bernardino in January?
About 7 days in January have at least 0.01 in of precipitation, and the normal total is 2.8 in. The wettest January in 1991-2020 was in 1993 (11.7 in); the driest was in 2003 (0.01 in).
Is January a good time to visit San Bernardino?
January ranks 5th of 12 months on our comfort score for San Bernardino (66 out of 100). It has about 17 comfortable days. The best months are March, April and May.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Redlands (USC00047306), 7.3 mi SE of the city center, 1,410 ft (359 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: March AFB (USW00023119), 15 mi S of the city center, 1,516 ft (465 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: March Air Reserve Base (722860-23119), 15 mi S of the city center, 1,536 ft (485 ft higher than the city). Hourly observations, 1991-2020.