Multnomah County (Portland)
December
Weather in Multnomah County, Oregon for December 2026
Your guide to Multnomah County weather in December - trends and predictions
In general, the average temperature in Multnomah County at the beginning of December is 9.1 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 7.6 °C by the end of December.
Multnomah County in December brings notable rainfall, with an average of 17 rainy days and a total precipitation of 439.2 mm.
Is December a good time to visit Multnomah County? check out the best time to travel to Multnomah County page.
✨ Is December a good time to visit Multnomah County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
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14
Dry days
17
Rainy days
0
Snow days
8°/5°
Temperatures
13 km/h
Avg max wind
89 %
Avg humidity
Multnomah County Weather December
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Temperatures trend during December in Multnomah County
See the weather trend as well as the moving average line
December weather in Multnomah County day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 |  Patchy rain possible | 7° /1° | 2 mm | 0 cm | |
| Dec. 2 |  Moderate rain | 9° /4° | 14.7 mm | 0 cm | |
| Dec. 3 |  Heavy rain | 9° /3° | 21.3 mm | 0 cm | |
| Dec. 4 |  Light rain | 10° /5° | 1.7 mm | 0 cm | |
| Dec. 5 | Heavy rain | 10° /5° | 25 mm | 0 cm | |
| Dec. 6 | Moderate rain | 10° /6° | 16.5 mm | 0 cm | |
| Dec. 7 | Heavy rain | 9° /6° | 25.4 mm | 0 cm | |
| Dec. 8 | Moderate rain | 9° /6° | 21.4 mm | 0 cm | |
| Dec. 9 | Heavy rain | 8° /4° | 49.9 mm | 0 cm | |
| Dec. 10 | Moderate rain | 9° /6° | 11.9 mm | 0 cm | |
| Dec. 11 | Light drizzle | 10° /6° | 0.6 mm | 0 cm | |
| Dec. 12 | Light rain | 9° /6° | 2.6 mm | 0 cm | |
| Dec. 13 | Light rain | 9° /6° | 5.6 mm | 0 cm | |
| Dec. 14 | Light rain | 8° /5° | 8.8 mm | 0 cm | |
| Dec. 15 | Patchy rain possible | 9° /6° | 2.1 mm | 0 cm | |
| Dec. 16 | Moderate rain | 9° /6° | 20.1 mm | 0 cm | |
| Dec. 17 | Heavy rain | 10° /5° | 25.4 mm | 0 cm | |
| Dec. 18 | Heavy rain | 9° /5° | 31.5 mm | 0 cm | |
| Dec. 19 | Heavy rain | 8° /5° | 25.3 mm | 0 cm | |
| Dec. 20 | Light rain | 8° /5° | 4 mm | 0 cm | |
| Dec. 21 | Moderate rain | 9° /5° | 19.4 mm | 0 cm | |
| Dec. 22 |  Light freezing rain | 5° /2° | 5.9 mm | 0.6 cm | |
| Dec. 23 | Light freezing rain | 6° /2° | 11.3 mm | 0.7 cm | |
| Dec. 24 | Light rain | 8° /3° | 5.9 mm | 0 cm | |
| Dec. 25 |  Heavy rain at times | 7° /4° | 11.3 mm | 0 cm | |
| Dec. 26 | Moderate rain | 9° /4° | 23.3 mm | 0 cm | |
| Dec. 27 | Moderate rain | 7° /5° | 18.5 mm | 0 cm | |
| Dec. 28 | Light rain | 8° /4° | 2.9 mm | 0 cm | |
| Dec. 29 | Heavy rain at times | 8° /4° | 20.2 mm | 0 cm | |
| Dec. 30 | Light rain | 8° /5° | 3.7 mm | 0 cm | |
| Dec. 31 | Patchy rain possible | 7° /3° | 1 mm | 0 cm | |
| Next | |||||
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.
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Multnomah County in December - FAQ
What are the expected maximum and minimum temperatures in Multnomah County during December?
During December, expect a variety of temperatures with highs around 8° and lows near 5°, suitable for diverse activities and preferences.
How much rainfall should be expected in Multnomah County during December?
Significant rainfall exceeding 439.2 mm is expected in Multnomah County during December, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Multnomah County in December 2026?
Multnomah County typically sees 1.3 cm of snowfall during December.
What are the typical wind conditions in Multnomah County during December?
The average wind speed in Multnomah County during December is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
Multnomah County snow forecast December 2026
Track daily snowfall levels and discover Multnomah County’s snowy potential this December ❄️
December rainfall patterns in Multnomah County
Explore the daily rainfall trends and prepare for Multnomah Countys December weather 💧
Typically, Multnomah County has 17 rainy days in December with a total of 439.2 mm of rainfall.
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