Portland
December
Weather in Portland for December 2026
Your guide to Portland weather in December - trends and predictions
In general, the average temperature in Portland at the beginning of December is 11.4 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 6.4 °C by the end of December.
Portland in December brings notable rainfall, with an average of 20 rainy days and a total precipitation of 108.5 mm.
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Temperatures
Rain 🌧️
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11
Dry days
20
Rainy days
0
Snow days
10°/8°
Temperatures
42 km/h
Avg max wind
81 %
Avg humidity
Portland Weather December
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Temperatures trend during December in Portland
See the weather trend as well as the moving average line
December weather in Portland day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Light rain | 12° /10° | 6.9 mm | 0 | |
| 2 Dec. |  Light rain shower | 10° /8° | 3.8 mm | 0 | |
| 3 Dec. | Light rain shower | 11° /9° | 4.6 mm | 0 | |
| 4 Dec. | Patchy rain possible | 10° /7° | 2.7 mm | 0 | |
| 5 Dec. | Light rain shower | 13° /7° | 12 mm | 0 | |
| 6 Dec. | Light rain shower | 11° /10° | 3.6 mm | 0 | |
| 7 Dec. | Light rain | 13° /11° | 7.4 mm | 0 | |
| 8 Dec. | Light rain shower | 13° /11° | 5.3 mm | 0 | |
| 9 Dec. | Light drizzle | 13° /11° | 6.6 mm | 0 | |
| 10 Dec. | Patchy rain possible | 11° /10° | 1.1 mm | 0 | |
| 11 Dec. |  Cloudy | 11° /10° | 0.4 mm | 0 | |
| 12 Dec. | Light rain shower | 11° /9° | 3.3 mm | 0 | |
| 13 Dec. |  Sunny | 10° /8° | 0 mm | 0 | |
| 14 Dec. | Cloudy | 11° /10° | 0 mm | 0 | |
| 15 Dec. | Light rain shower | 12° /10° | 4.8 mm | 0 | |
| 16 Dec. | Patchy rain possible | 12° /7° | 1.3 mm | 0 | |
| 17 Dec. | Light drizzle | 10° /7° | 7.8 mm | 0 | |
| 18 Dec. | Light rain shower | 12° /9° | 16.1 mm | 0 | |
| 19 Dec. | Patchy rain possible | 10° /9° | 0.7 mm | 0 | |
| 20 Dec. | Light rain shower | 10° /9° | 9.4 mm | 0 | |
| 21 Dec. | Light rain shower | 10° /9° | 9.5 mm | 0 | |
| 22 Dec. | Patchy rain possible | 11° /9° | 0.9 mm | 0 | |
| 23 Dec. | Patchy rain possible | 10° /6° | 0.1 mm | 0 | |
| 24 Dec. |  Overcast | 7° /4° | 0 mm | 0 | |
| 25 Dec. | Cloudy | 5° /3° | 0 mm | 0 | |
| 26 Dec. | Overcast | 5° /2° | 0 mm | 0 | |
| 27 Dec. | Patchy rain possible | 8° /3° | 0.2 mm | 0 | |
| 28 Dec. | Patchy rain possible | 8° /4° | 0 mm | 0 | |
| 29 Dec. | Patchy rain possible | 7° /4° | 0 mm | 0 | |
| 30 Dec. | Overcast | 7° /3° | 0 mm | 0 | |
| 31 Dec. | Sunny | 5° /2° | 0 mm | 0 | |
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Important Notice
Our weather forecast for Portland 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 Portland forecast closer to your planned date for the most up-to-date weather information.
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Portland in December - FAQ
What are the expected maximum and minimum temperatures in Portland during December?
During December, expect a variety of temperatures with highs around 10° and lows near 8°, suitable for diverse activities and preferences.
How much rainfall should be expected in Portland during December?
Significant rainfall exceeding 108.5 mm is expected in Portland during December, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Portland during December?
The average wind speed in Portland during December is 42 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Portland
Explore the daily rainfall trends and prepare for Portlands December weather 💧
Typically, Portland has 20 rainy days in December with a total of 108.5 mm of rainfall.
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