Weather in San Bernardino in December
In an average December, San Bernardino sees a daily high around 61°F and a low around 41°F, based on 1980–2026 of local climate records.
| Average high | 61°F |
|---|---|
| Typical high range | 51°F to 71°F |
| Average low | 41°F |
| Typical low range | 34°F to 48°F |
| Average daily precipitation | 0.10 in |
December records
The most extreme December on record for each metric, across 1980–2026. For rainfall, the wettest and driest are by total December accumulation.
High
Highest
81°F
1980-12-16
Lowest
41°F
1990-12-22
Low
Highest
55°F
2014-12-04
Lowest
23°F
1990-12-23
Feels-like
Highest
79°F
2013-12-17
Lowest
15°F
1990-12-23
Humidity
Highest
11.3 g/m³
2014-12-03
Lowest
0.8 g/m³
2020-12-05
Wind
Highest
17 mph
1997-12-11
Lowest
3 mph
1995-12-30
Gust
Highest
50 mph
2004-12-29
Lowest
9 mph
1982-12-16
Precip
Wettest
11.34 in
2010
Driest
0.02 in
2017
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