Weather in Tri-Cities in December
Tri-Cities, United States averages a high of 5.3°C (41.5°F) and low of -1.3°C (29.7°F) in December, with 9 rain days and 5.1 hours of daily sunshine. Travel score: 48/100 (Mixed). The best time to visit Tri-Cities is August.
High
5°C42°F
Low
-1°C30°F
🌧️
9
rain days
☀️
5.1
hrs/day sunshine
💧
80%
humidity
48— Mixed
December in Tri-Cities is cold and occasionally wet — mixed conditions — plan indoor alternatives.
What are the average temperatures in Tri-Cities?
How much does it rain in Tri-Cities in December?
Tri-Cities receives an average of 36.9mm of rainfall across 9 rainy days in December. The annual total is 229.1mm.
What should I pack for Tri-Cities in December?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Warm coat
Cool weather with highs around 5°C
🧶
Sweaters and warm layers
Layer up for comfort
🧤
Warm gloves
Cold nights around -1°C
🧣
Warm scarf
Protect against cold winds
🎉Visiting United States in December?
Don't miss any public holidays — check before you book!
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What is the weather like in other months in Tri-Cities?
Data based on 1994–2024 averages · Last updated: 2024-12-31