Weather in Fontana, California, United States in December
In an average December, Fontana sees a daily high around 63°F and a low around 41°F, based on 1981–2026 of local climate records.
| Average high | 63°F |
|---|---|
| Typical high range | 53°F to 75°F |
| Average low | 41°F |
| Typical low range | 33°F to 49°F |
| Average daily precipitation | 0.10 in |
December records
The most extreme December on record for each metric, across 1981–2026. For rainfall, the wettest and driest are by total December accumulation.
High
Highest
84°F
2025-12-10
Lowest
40°F
2008-12-17
Low
Highest
57°F
2025-12-14
Lowest
21°F
1990-12-23
Feels-like
Highest
83°F
2025-12-10
Lowest
6°F
1990-12-23
Humidity
Highest
12.5 g/m³
2014-12-03
Lowest
0.9 g/m³
1990-12-23
Wind
Highest
31 mph
1997-12-11
Lowest
4 mph
2023-12-03
Precip
Wettest
10.55 in
2010
Driest
0.01 in
2017
See Fontana's live weather grade →
Visiting Fontana in December? See how its comfort stacks up against where you live.
Compare Fontana with your city →