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Marion County (Salem)
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United States weather

Weather in Marion County, Oregon for December 2025

Your guide to Marion County weather in December - trends and predictions

    Temperatures

  • So far, December 2025 in Marion County is slightly warmer than the historical average by 1 °F.

  • The forecast for the next days in Marion County predicts temperatures to be around 10 °F, close to the historical average.

  • In general, the average temperature in Marion County at the beginning of December is 9.1 °F. As the month progressed, temperatures tended to slightly increase, reaching an average of 9.4 °F by the end of December.

    • Rain 🌧️

  • Marion County experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 387.3 mm.

    • More

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Average dry days
3
Dry days
Average rainy days
28
Rainy days
Average snowy days
0
Snow days
Average temperatures
9°/4°
Temperatures
Average wind speed
14 km/h
Avg max wind
Average humidity
90 %
Avg humidity

Marion County Weather December

Move between months or click on a day
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Mist
6°
2
Light rain shower
9°
3
Heavy rain
8°
4
Overcast
10°
5
Moderate or heavy rain with thunder
11°
6
Moderate or heavy rain with thunder
11°
7
Moderate or heavy rain shower
9°
8
Light rain shower
10°
9
Moderate rain
8°
10
Heavy rain
8°
11
Fog
11°
12
Mist
10°
13
Partly cloudy
8°
14
Patchy rain possible
8°
15
Moderate rain
14°
16
Patchy rain possible
14°
17
Moderate rain
9°
18
Heavy rain
10°
19
Moderate rain
9°
20
Cloudy
8°
21
Moderate rain
12°
22
Patchy rain possible
9°
23
Patchy rain possible
5°
24
Patchy rain possible
6°
25
Mist
11°
26
Patchy rain possible
8°
27
Moderate rain
13°
28
Patchy rain possible
9°
29
Patchy rain possible
9°
30
Light rain shower
9°
31
Mist
7°

Temperatures trend during December in Marion County

See the weather trend as well as the moving average line

December weather in Marion County day by day

Click on a date for more information
November January
Date Weather Temperatures Rain UV More
Dec. 1 Mist
Mist
 6° /1° 2.2 mm 2
Dec. 2 Light rain shower
Light rain shower
 9° /3° 14.6 mm 2
Dec. 3 Heavy rain
Heavy rain
 8° /2° 23.1 mm 2
Dec. 4 Overcast
Overcast
 10° /3° 1.3 mm 3
Dec. 5 Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 11° /5° 23 mm 3
Dec. 6 Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 11° /5° 15.4 mm 3
Dec. 7 Moderate or heavy rain shower
Moderate or heavy rain shower
 9° /5° 22.7 mm 2
Dec. 8 Light rain shower
Light rain shower
 10° /6° 9.3 mm 2
Dec. 9 Moderate rain
Moderate rain
 8° /3° 39.8 mm 2
Dec. 10 Heavy rain
Heavy rain
 8° /5° 10.4 mm 2
Dec. 11 Fog
Fog
 11° /5° 0.4 mm 3
Dec. 12 Mist
Mist
 10° /5° 3.1 mm 2
Dec. 13 Partly cloudy
Partly cloudy
 8° /4° 2.6 mm 2
Dec. 14 Patchy rain possible
Patchy rain possible
 8° /5° 4.3 mm 2
Dec. 15 Moderate rain
Moderate rain
 14° /8° 13.1 mm 0
Dec. 16 Patchy rain possible
Patchy rain possible
 14° /11° 1.4 mm 0.1
Dec. 17 Moderate rain
Moderate rain
 9° /7° 11 mm 0.2
Dec. 18 Heavy rain
Heavy rain
 10° /5° 45.5 mm 0
Dec. 19 Moderate rain
Moderate rain
 9° /3° 6.9 mm 0
Dec. 20 Cloudy
Cloudy
 8° /2° 0.1 mm 1
Dec. 21 Moderate rain
Moderate rain
 12° /2° 10.8 mm 2
Dec. 22 Patchy rain possible
Patchy rain possible
 9° /3° 1.7 mm 2
Dec. 23 Patchy rain possible
Patchy rain possible
 5° /1° 0.1 mm 1
Dec. 24 Patchy rain possible
Patchy rain possible
 6° /3° 0.5 mm 1
Dec. 25 Mist
Mist
 11° /5° 0 mm 2
Dec. 26 Patchy rain possible
Patchy rain possible
 8° /3° 2.6 mm 2
Dec. 27 Moderate rain
Moderate rain
 13° /6° 5.6 mm 2
Dec. 28 Patchy rain possible
Patchy rain possible
 9° /5° 0.3 mm 2
Dec. 29 Patchy rain possible
Patchy rain possible
 9° /5° 45.7 mm 2
Dec. 30 Light rain shower
Light rain shower
 9° /5° 2.7 mm 3
Dec. 31 Mist
Mist
 7° /1° 1 mm 2
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 387.3 mm is expected in Marion County during December, occurring over more than 28 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Marion County in December 2025?
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 14 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 28 rainy days in December with a total of 387.3 mm of rainfall.
Top locations in Marion County
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IndianapolisOcalaSalem
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Location coordinates Where is Marion County?

Get accurate weather forecasts for Marion County, located at latitude 44.943 and longitude -123.035. Stay updated with localized weather information tailored for Marion County.

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