Portland
December
Weather in Portland for December 2025
Your guide to Portland weather in December - trends and predictions
With an average of 2 snowy days, Portland usually enjoys a light touch of snow in December.
In general, the average temperature in Portland 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.
Portland 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
Portland 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 Portland
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 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.
Portland in December - FAQ
What are the expected maximum and minimum temperatures in Portland during December?
Prepare for cooler days with highs just around 8° and colder nights, dipping below 4°.
How much rainfall should be expected in Portland during December?
Significant rainfall exceeding 272.5 mm is expected in Portland during December, occurring over more than 19 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Portland in December 2025?
Portland experiences an average snowfall of 2.635 cm during December, occurring over 2 days.
What are the typical wind conditions in Portland during December?
The average wind speed in Portland during December is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
Portland snow forecast December 2025
Track daily snowfall levels and discover Portland’s snowy potential this December ❄️
December rainfall patterns in Portland
Explore the daily rainfall trends and prepare for Portlands December weather 💧
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