Tri-Cities (WA)
December
Weather in Tri-Cities, Washington for December 2026
Your guide to Tri-Cities weather in December - trends and predictions
Snowfall in Tri-Cities during December is quite rare, with fewer than 2 snowy days on average.
In general, the average temperature in Tri-Cities at the beginning of December is 5.8 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 5.1 °C by the end of December.
Tri-Cities experiences moderate rainfall in December, with an average of 8 rainy days and a total precipitation of 89.1 mm.
Is December a good time to visit Tri-Cities? check out the best time to travel to Tri-Cities page.
✨ Is December a good time to visit Tri-Cities? – Ask the AI Weatherman
Snow Forecast ❄️
Temperatures
Rain 🌧️
More
22
Dry days
8
Rainy days
1
Snow days
6°/1°
Temperatures
19 km/h
Avg max wind
85 %
Avg humidity
Tri-Cities Weather December
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Temperatures trend during December in Tri-Cities
See the weather trend as well as the moving average line
December weather in Tri-Cities day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 |  Patchy rain possible | 4° /-2° | 1.2 mm | 0 cm | |
| Dec. 2 |  Overcast | 4° /0° | 0 mm | 0 cm | |
| Dec. 3 |  Light rain | 5° /0° | 3.1 mm | 0 cm | |
| Dec. 4 | Light rain | 5° /1° | 2.4 mm | 0 cm | |
| Dec. 5 | Light rain | 8° /2° | 4.1 mm | 0 cm | |
| Dec. 6 | Patchy rain possible | 8° /3° | 0.8 mm | 0 cm | |
| Dec. 7 | Light rain | 8° /1° | 4.8 mm | 0 cm | |
| Dec. 8 |  Mist | 10° /3° | 0 mm | 0 cm | |
| Dec. 9 | Light drizzle | 6° /1° | 0.3 mm | 0 cm | |
| Dec. 10 | Light rain | 7° /2° | 4.1 mm | 0 cm | |
| Dec. 11 | Overcast | 8° /3° | 0.1 mm | 0 cm | |
| Dec. 12 | Overcast | 6° /2° | 0 mm | 0 cm | |
| Dec. 13 |  Partly cloudy | 6° /1° | 0 mm | 0 cm | |
| Dec. 14 | Light rain | 7° /2° | 4.3 mm | 0 cm | |
| Dec. 15 | Overcast | 8° /2° | 0 mm | 0 cm | |
| Dec. 16 | Light rain | 6° /2° | 7.3 mm | 0 cm | |
| Dec. 17 | Light rain | 8° /2° | 4.8 mm | 0 cm | |
| Dec. 18 | Light rain | 9° /2° | 3.1 mm | 0 cm | |
| Dec. 19 | Patchy rain possible | 7° /1° | 0 mm | 0 cm | |
| Dec. 20 | Partly cloudy | 7° /2° | 0 mm | 0 cm | |
| Dec. 21 | Patchy rain possible | 6° /1° | 1.4 mm | 0 cm | |
| Dec. 22 |  Light snow | 0° /-5° | 3.5 mm | 0 cm | |
| Dec. 23 | Mist | 1° /-3° | 0.9 mm | 0 cm | |
| Dec. 24 | Light snow | 3° /-1° | 10.4 mm | 0.6 cm | |
| Dec. 25 |  Light freezing rain | 3° /-2° | 1.2 mm | 0 cm | |
| Dec. 26 |  Moderate rain | 7° /2° | 18.1 mm | 0 cm | |
| Dec. 27 | Light rain | 6° /1° | 2.6 mm | 0 cm | |
| Dec. 28 | Light rain | 6° /1° | 4 mm | 0 cm | |
| Dec. 29 | Light rain | 5° /1° | 4.5 mm | 0 cm | |
| Dec. 30 | Patchy rain possible | 6° /0° | 2 mm | 0.3 cm | |
| Dec. 31 |  Cloudy | 3° /-1° | 0.2 mm | 0 cm | |
| Next | |||||
Important Notice
Our weather forecast for Tri-Cities in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Tri-Cities forecast closer to your planned date for the most up-to-date weather information.
Change Month
Tri-Cities in December - FAQ
What are the expected maximum and minimum temperatures in Tri-Cities during December?
Prepare for cooler days with highs just around 6° and colder nights, dipping below 1°.
How much rainfall should be expected in Tri-Cities during December?
Moderate rainfall is anticipated in Tri-Cities during December, with a total of 89.1 mm spread over approximately 8 days. Considering plans for rainy days is advisable.
Will it snow in Tri-Cities in December 2026?
Tri-Cities typically sees 0.8 cm of snowfall during December.
What are the typical wind conditions in Tri-Cities during December?
The average wind speed in Tri-Cities during December is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
Tri-Cities snow forecast December 2026
Track daily snowfall levels and discover Tri-Cities’s snowy potential this December ❄️
On average, Tri-Cities sees 1 snowy days during December, with approximately 0.8 cm of total snowfall.
December rainfall patterns in Tri-Cities
Explore the daily rainfall trends and prepare for Tri-Citiess December weather 💧
Typically, Tri-Cities has 8 rainy days in December with a total of 89.1 mm of rainfall.
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Where is Tri-Cities?Get accurate weather forecasts for Tri-Cities, located at latitude 46.245 and longitude -119.196. Stay updated with localized weather information tailored for Tri-Cities.
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