Franklin County (Tri-Cities)
December
Weather in Franklin County, Washington for December 2026
Your guide to Franklin County weather in December - trends and predictions
Snowfall in Franklin County during December is quite rare, with fewer than 2 snowy days on average.
In general, the average temperature in Franklin County 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.
Franklin County 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 Franklin County? check out the best time to travel to Franklin County page.
✨ Is December a good time to visit Franklin County? – 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
Franklin County Weather December
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Temperatures trend during December in Franklin County
See the weather trend as well as the moving average line
December weather in Franklin County 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 Franklin County 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 Franklin County forecast closer to your planned date for the most up-to-date weather information.
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Franklin County in December - FAQ
What are the expected maximum and minimum temperatures in Franklin County during December?
Prepare for cooler days with highs just around 6° and colder nights, dipping below 1°.
How much rainfall should be expected in Franklin County during December?
Moderate rainfall is anticipated in Franklin County 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 Franklin County in December 2026?
Franklin County typically sees 0.8 cm of snowfall during December.
What are the typical wind conditions in Franklin County during December?
The average wind speed in Franklin County during December is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
Franklin County snow forecast December 2026
Track daily snowfall levels and discover Franklin County’s snowy potential this December ❄️
On average, Franklin County sees 1 snowy days during December, with approximately 0.8 cm of total snowfall.
December rainfall patterns in Franklin County
Explore the daily rainfall trends and prepare for Franklin Countys December weather 💧
Typically, Franklin County has 8 rainy days in December with a total of 89.1 mm of rainfall.
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