Weather in Tri-Cities in December
In an average December, Tri-Cities sees a daily high around 41°F and a low around 29°F, based on 1980–2026 of local climate records.
| Average high | 41°F |
|---|---|
| Typical high range | 29°F to 54°F |
| Average low | 29°F |
| Typical low range | 18°F to 41°F |
| Average daily precipitation | 0.00 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
69°F
2025-12-15
Lowest
9°F
1990-12-22
Low
Highest
60°F
2025-12-11
Lowest
-7°F
1985-12-01
Feels-like
Highest
60°F
2025-12-11
Lowest
-20°F
1985-12-01
Humidity
Highest
9.5 g/m³
1980-12-25
Lowest
0.8 g/m³
1983-12-24
Wind
Highest
30 mph
2006-12-15
Lowest
2 mph
1999-12-31
Gust
Highest
59 mph
2006-12-15
Lowest
5 mph
2008-12-26
Precip
Wettest
3.66 in
1996
Driest
0.43 in
1989
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