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Weather in Portland, Oregon for December 2025

Your guide to Portland weather in December - trends and predictions

    Snow Forecast ❄️

  • With an average of 2 snowy days, Portland usually enjoys a light touch of snow in December.
    According to Portland snow forecast for December 2025, 4 snowy days are expected in the next 2 weeks. The closest date with snow is Monday, December 22.

    • Temperatures

  • Until now, December 2025 in Portland has been nearly identical to the historical average, with a temperature of 9.6 °F (showing only a slight deviation of 0.3 °F).

  • Expect cooler weather in the next days in Portland with the forecast suggesting a temperature of 5.3 °F, lower than the historical average.

  • In general, the average temperature in Portland at the beginning of December is 9.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 3.1 °F by the end of December.

    • Rain 🌧️

  • Portland experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 408.9 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
3
Dry days
Average rainy days
26
Rainy days
Average snowy days
2
Snow days
Average temperatures
8°/4°
Temperatures
Average wind speed
12 km/h
Avg max wind
Average humidity
87 %
Avg humidity

Portland Weather December

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

Temperatures trend during December in Portland

See the weather trend as well as the moving average line

December weather in Portland day by day

Click on a date for more information
November January
Date Weather Temperatures Rain Snow More
Dec. 1 Moderate rain
Moderate rain
 8° /1° 2 mm 0 cm
Dec. 2 Light rain shower
Light rain shower
 9° /4° 14.7 mm 0 cm
Dec. 3 Heavy rain
Heavy rain
 9° /3° 21.3 mm 0 cm
Dec. 4 Light rain
Light rain
 10° /5° 1.7 mm 0 cm
Dec. 5 Heavy rain
Heavy rain
 10° /5° 25 mm 0 cm
Dec. 6 Overcast
Overcast
 10° /5° 16.5 mm 0 cm
Dec. 7 Light rain shower
Light rain shower
 9° /6° 25.4 mm 0 cm
Dec. 8 Fog
Fog
 9° /6° 21.4 mm 0 cm
Dec. 9 Moderate rain
Moderate rain
 8° /4° 49.9 mm 0 cm
Dec. 10 Moderate rain
Moderate rain
 10° /5° 11.9 mm 0 cm
Dec. 11 Light drizzle
Light drizzle
 10° /6° 0.6 mm 0 cm
Dec. 12 Mist
Mist
 9° /5° 2.6 mm 0 cm
Dec. 13 Partly cloudy
Partly cloudy
 9° /6° 5.6 mm 0 cm
Dec. 14 Patchy rain possible
Patchy rain possible
 12° /6° 2.5 mm 0 cm
Dec. 15 Overcast
Overcast
 14° /8° 0 mm 0 cm
Dec. 16 Moderate rain
Moderate rain
 12° /12° 18.4 mm 0 cm
Dec. 17 Moderate rain
Moderate rain
 8° /6° 9.6 mm 0 cm
Dec. 18 Patchy rain possible
Patchy rain possible
 7° /5° 4 mm 0 cm
Dec. 19 Patchy rain possible
Patchy rain possible
 7° /3° 1.2 mm 0 cm
Dec. 20 Patchy rain possible
Patchy rain possible
 5° /4° 1.7 mm 0 cm
Dec. 21 Moderate rain
Moderate rain
 5° /3° 6.1 mm 0 cm
Dec. 22 Patchy rain possible
Patchy rain possible
 6° /2° 0.8 mm 0 cm
Dec. 23 Moderate rain
Moderate rain
 3° /2° 9.7 mm 0 cm
Dec. 24 Patchy rain possible
Patchy rain possible
 5° /2° 1.5 mm 0.5 cm
Dec. 25 Moderate or heavy snow showers
Moderate or heavy snow showers
 -2° /-6° 2.2 mm 1.6 cm
Dec. 26 Heavy snow
Heavy snow
 -4° /-9° 1.1 mm 0.8 cm
Dec. 27 Mist
Mist
 -4° /-11° 0 mm 0 cm
Dec. 28 Patchy rain possible
Patchy rain possible
 9° /5° 3.9 mm 0 cm
Dec. 29 Heavy rain at times
Heavy rain at times
 8° /5° 27 mm 0 cm
Dec. 30 Heavy rain at times
Heavy rain at times
 8° /5° 4.9 mm 0 cm
Dec. 31 Fog
Fog
 7° /3° 1.3 mm 0 cm
Next
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?
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 408.9 mm is expected in Portland during December, occurring over more than 26 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Portland in December 2025?
Portland experiences an average snowfall of 1.75667 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 12 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 ❄️
On average, Portland sees 2 snowy days during December, with approximately 1.8 cm of total snowfall.

December rainfall patterns in Portland

Explore the daily rainfall trends and prepare for Portlands December weather 💧
Typically, Portland has 26 rainy days in December with a total of 408.9 mm of rainfall.

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Get accurate weather forecasts for Portland, located at latitude 45.523 and longitude -122.676. Stay updated with localized weather information tailored for Portland.

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