Marion County (Salem)
December
Weather in Marion County, Oregon for December 2026
Your guide to Marion County weather in December - trends and predictions
In general, the average temperature in Marion County at the beginning of December is 8.8 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 7.9 °C by the end of December.
The climate of Marion County in December is notably wet, with an average of 15 rainy days, and a total of 383.3 mm of precipitation.
Is December a good time to visit Marion County? check out the best time to travel to Marion County page.
✨ Is December a good time to visit Marion County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
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16
Dry days
15
Rainy days
0
Snow days
9°/4°
Temperatures
15 km/h
Avg max wind
90 %
Avg humidity
Marion County Weather December
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Temperatures trend during December in Marion County
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December weather in Marion County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Dec. 1 |  Patchy rain possible | 6° /1° | 2.2 mm | 1.3 | |
| Dec. 2 |  Moderate rain | 9° /3° | 14.6 mm | 1.3 | |
| Dec. 3 |  Heavy rain | 8° /2° | 23.1 mm | 1.2 | |
| Dec. 4 | Patchy rain possible | 9° /4° | 1.3 mm | 1.2 | |
| Dec. 5 |  Moderate or heavy rain with thunder | 10° /5° | 23 mm | 1.2 | |
| Dec. 6 | Moderate or heavy rain with thunder | 10° /5° | 15.4 mm | 1.2 | |
| Dec. 7 | Moderate rain | 9° /6° | 22.7 mm | 1.2 | |
| Dec. 8 |  Light rain | 9° /6° | 9.3 mm | 1.2 | |
| Dec. 9 | Heavy rain | 8° /3° | 39.8 mm | 1.2 | |
| Dec. 10 | Heavy rain | 8° /6° | 10.4 mm | 1.2 | |
| Dec. 11 |  Fog | 11° /5° | 0.4 mm | 1.2 | |
| Dec. 12 | Light rain | 10° /6° | 3.1 mm | 1.1 | |
| Dec. 13 | Light rain | 8° /4° | 2.6 mm | 1.1 | |
| Dec. 14 | Light rain | 8° /5° | 4.3 mm | 1.1 | |
| Dec. 15 | Patchy rain possible | 10° /6° | 1.9 mm | 1.1 | |
| Dec. 16 | Light rain | 9° /6° | 6.5 mm | 1.1 | |
| Dec. 17 | Moderate rain | 11° /5° | 17 mm | 1.1 | |
| Dec. 18 | Heavy rain | 10° /5° | 33 mm | 1.1 | |
| Dec. 19 | Heavy rain | 10° /5° | 34.1 mm | 1.1 | |
| Dec. 20 |  Overcast | 10° /5° | 0 mm | 1.1 | |
| Dec. 21 | Moderate rain | 9° /4° | 14.1 mm | 1.1 | |
| Dec. 22 | Light rain | 9° /5° | 5.8 mm | 1.1 | |
| Dec. 23 | Moderate rain | 8° /4° | 11.1 mm | 1.1 | |
| Dec. 24 | Light rain | 9° /3° | 3.2 mm | 1.1 | |
| Dec. 25 | Light rain | 8° /4° | 9.8 mm | 1 | |
| Dec. 26 | Moderate rain | 9° /5° | 23.7 mm | 1.1 | |
| Dec. 27 | Moderate rain | 8° /4° | 12 mm | 1.1 | |
| Dec. 28 | Light rain | 8° /4° | 5.9 mm | 1.1 | |
| Dec. 29 | Heavy rain | 8° /3° | 30.5 mm | 1 | |
| Dec. 30 | Light rain shower | 8° /3° | 1.8 mm | 1.2 | |
| Dec. 31 | Mist | 6° /1° | 0.7 mm | 1 | |
| Next | |||||
Important Notice
Our weather forecast for Marion 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 Marion County forecast closer to your planned date for the most up-to-date weather information.
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Marion County in December - FAQ
What are the expected maximum and minimum temperatures in Marion County during December?
Prepare for cooler days with highs just around 9° and colder nights, dipping below 4°.
How much rainfall should be expected in Marion County during December?
Significant rainfall exceeding 383.3 mm is expected in Marion County during December, occurring over more than 15 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Marion County in December 2026?
Marion County typically sees 0 cm of snowfall during December.
What are the typical wind conditions in Marion County during December?
The average wind speed in Marion County during December is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Marion County
Explore the daily rainfall trends and prepare for Marion Countys December weather 💧
Typically, Marion County has 15 rainy days in December with a total of 383.3 mm of rainfall.
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