Multnomah County (Portland)
December
Weather in Multnomah County for December 2025
Your guide to Multnomah County weather in December - trends and predictions
With an average of 2 snowy days, Multnomah County usually enjoys a light touch of snow in December.
In general, the average temperature in Multnomah County at the beginning of December is 10 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 7.9 °F by the end of December.
Multnomah County in December brings notable rainfall, with an average of 19 rainy days and a total precipitation of 272.5 mm.
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Snow Forecast ❄️
Temperatures
Rain 🌧️
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10
Dry days
19
Rainy days
2
Snow days
8°/4°
Temperatures
11 km/h
Avg max wind
85 %
Avg humidity
Multnomah County in December average weather
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  9° | 2  10° | 3  10° | 4  12° | 5 10° | 6  10° | |
| 7 9° | 8  8° | 9 6° | 10 8° | 11 9° | 12 7° | 13  9° |
| 14 8° | 15  8° | 16 8° | 17  10° | 18 9° | 19 9° | 20 10° |
| 21 10° | 22  5° | 23 6° | 24 7° | 25  6° | 26  9° | 27 8° |
| 28 9° | 29 8° | 30 8° | 31 7° |
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Temperatures trend during December in Multnomah County
See the weather trend as well as the moving average line
December weather day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 | Moderate rain | 9° /1° | 3 mm | 0 cm | |
| Dec. 2 | Light rain shower | 10° /3° | 22 mm | 0 cm | |
| Dec. 3 | Heavy rain | 10° /2° | 31.9 mm | 0 cm | |
| Dec. 4 | Light rain | 12° /6° | 2.5 mm | 0 cm | |
| Dec. 5 | Heavy rain | 10° /5° | 31.9 mm | 0 cm | |
| Dec. 6 | Moderate or heavy rain with thunder | 10° /4° | 24.7 mm | 0 cm | |
| Dec. 7 | Light rain shower | 9° /5° | 34.8 mm | 0 cm | |
| Dec. 8 | Fog | 8° /4° | 0.6 mm | 0 cm | |
| Dec. 9 | Moderate rain | 6° /2° | 12 mm | 0 cm | |
| Dec. 10 | Moderate rain | 8° /3° | 17.9 mm | 0 cm | |
| Dec. 11 | Light drizzle | 9° /3° | 0.9 mm | 0 cm | |
| Dec. 12 | Mist | 7° /3° | 3.9 mm | 0 cm | |
| Dec. 13 | Partly cloudy | 9° /5° | 8.4 mm | 0 cm | |
| Dec. 14 | Patchy rain possible | 8° /5° | 6.9 mm | 0 cm | |
| Dec. 15 | Overcast | 8° /3° | 1.4 mm | 0 cm | |
| Dec. 16 | Overcast | 8° /3° | 14.2 mm | 0 cm | |
| Dec. 17 | Sunny | 10° /5° | 23.6 mm | 0 cm | |
| Dec. 18 | Light drizzle | 9° /5° | 1.8 mm | 0 cm | |
| Dec. 19 | Light drizzle | 9° /5° | 2.3 mm | 0 cm | |
| Dec. 20 | Mist | 10° /5° | 0 mm | 0 cm | |
| Dec. 21 | Mist | 10° /5° | 29.1 mm | 0 cm | |
| Dec. 22 | Light freezing rain | 5° /1° | 6.8 mm | 0.8 cm | |
| Dec. 23 | Light freezing rain | 6° /0° | 12.4 mm | 0.9 cm | |
| Dec. 24 | Overcast | 7° /2° | 7.9 mm | 0 cm | |
| Dec. 25 | Heavy rain at times | 6° /3° | 15 mm | 0 cm | |
| Dec. 26 | Moderate or heavy rain shower | 9° /4° | 31.1 mm | 0 cm | |
| Dec. 27 | Moderate or heavy rain shower | 8° /5° | 24.7 mm | 0 cm | |
| Dec. 28 | Patchy rain possible | 9° /5° | 3.9 mm | 0 cm | |
| Dec. 29 | Heavy rain at times | 8° /5° | 27 mm | 0 cm | |
| Dec. 30 | Heavy rain at times | 8° /5° | 4.9 mm | 0 cm | |
| Dec. 31 | Fog | 7° /3° | 1.3 mm | 0 cm | |
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Important Notice
Our weather forecast for Multnomah 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 Multnomah County forecast closer to your planned date for the most up-to-date weather information.
Multnomah County in December - FAQ
What are the expected maximum and minimum temperatures in Multnomah County during December?
Prepare for cooler days with highs just around 8° and colder nights, dipping below 4°.
How much rainfall should be expected in Multnomah County during December?
Significant rainfall exceeding 272.5 mm is expected in Multnomah County during December, occurring over more than 19 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Multnomah County in December 2025?
Multnomah County experiences an average snowfall of 2.635 cm during December, occurring over 2 days.
What are the typical wind conditions in Multnomah County during December?
The average wind speed in Multnomah County during December is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
Multnomah County snow forecast December 2025
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December rainfall patterns in Multnomah County
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Where is Multnomah County?Get accurate weather forecasts for Multnomah County, located at latitude 45.523 and longitude -122.676. Stay updated with localized weather information tailored for Multnomah County.
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