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United States weather

Weather in Portland, Oregon for December 2026

Your guide to Portland weather in December - trends and predictions

    Temperatures

  • In general, the average temperature in Portland 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.

    • Rain 🌧️

  • Portland in December brings notable rainfall, with an average of 17 rainy days and a total precipitation of 439.2 mm.

    • More

  • Is December a good time to visit Portland? check out the best time to travel to Portland page.

  • ✨ Is December a good time to visit Portland? – Ask the AI Weatherman

Average dry days
14
Dry days
Average rainy days
17
Rainy days
Average snowy days
0
Snow days
Average temperatures
8°/5°
Temperatures
Average wind speed
13 km/h
Avg max wind
Average humidity
89 %
Avg humidity

Portland Weather December

Move between months or click on a day
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Patchy rain possible
7°
2
Moderate rain
9°
3
Heavy rain
9°
4
Light rain
10°
5
Heavy rain
10°
6
Moderate rain
10°
7
Heavy rain
9°
8
Moderate rain
9°
9
Heavy rain
8°
10
Moderate rain
9°
11
Light drizzle
10°
12
Light rain
9°
13
Light rain
9°
14
Light rain
8°
15
Patchy rain possible
9°
16
Moderate rain
9°
17
Heavy rain
10°
18
Heavy rain
9°
19
Heavy rain
8°
20
Light rain
8°
21
Moderate rain
9°
22
Light freezing rain
5°
23
Light freezing rain
6°
24
Light rain
8°
25
Heavy rain at times
7°
26
Moderate rain
9°
27
Moderate rain
7°
28
Light rain
8°
29
Heavy rain at times
8°
30
Light rain
8°
31
Patchy rain possible
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 Patchy rain possible
Patchy rain possible
 7° /1° 2 mm 0 cm
Dec. 2 Moderate rain
Moderate rain
 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 Moderate rain
Moderate rain
 10° /6° 16.5 mm 0 cm
Dec. 7 Heavy rain
Heavy rain
 9° /6° 25.4 mm 0 cm
Dec. 8 Moderate rain
Moderate rain
 9° /6° 21.4 mm 0 cm
Dec. 9 Heavy rain
Heavy rain
 8° /4° 49.9 mm 0 cm
Dec. 10 Moderate rain
Moderate rain
 9° /6° 11.9 mm 0 cm
Dec. 11 Light drizzle
Light drizzle
 10° /6° 0.6 mm 0 cm
Dec. 12 Light rain
Light rain
 9° /6° 2.6 mm 0 cm
Dec. 13 Light rain
Light rain
 9° /6° 5.6 mm 0 cm
Dec. 14 Light rain
Light rain
 8° /5° 8.8 mm 0 cm
Dec. 15 Patchy rain possible
Patchy rain possible
 9° /6° 2.1 mm 0 cm
Dec. 16 Moderate rain
Moderate rain
 9° /6° 20.1 mm 0 cm
Dec. 17 Heavy rain
Heavy rain
 10° /5° 25.4 mm 0 cm
Dec. 18 Heavy rain
Heavy rain
 9° /5° 31.5 mm 0 cm
Dec. 19 Heavy rain
Heavy rain
 8° /5° 25.3 mm 0 cm
Dec. 20 Light rain
Light rain
 8° /5° 4 mm 0 cm
Dec. 21 Moderate rain
Moderate rain
 9° /5° 19.4 mm 0 cm
Dec. 22 Light freezing rain
Light freezing rain
 5° /2° 5.9 mm 0.6 cm
Dec. 23 Light freezing rain
Light freezing rain
 6° /2° 11.3 mm 0.7 cm
Dec. 24 Light rain
Light rain
 8° /3° 5.9 mm 0 cm
Dec. 25 Heavy rain at times
Heavy rain at times
 7° /4° 11.3 mm 0 cm
Dec. 26 Moderate rain
Moderate rain
 9° /4° 23.3 mm 0 cm
Dec. 27 Moderate rain
Moderate rain
 7° /5° 18.5 mm 0 cm
Dec. 28 Light rain
Light rain
 8° /4° 2.9 mm 0 cm
Dec. 29 Heavy rain at times
Heavy rain at times
 8° /4° 20.2 mm 0 cm
Dec. 30 Light rain
Light rain
 8° /5° 3.7 mm 0 cm
Dec. 31 Patchy rain possible
Patchy rain possible
 7° /3° 1 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.
Change Month
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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 8° and lows near 5°, suitable for diverse activities and preferences.

How much rainfall should be expected in Portland during December?
Significant rainfall exceeding 439.2 mm is expected in Portland during December, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.

Will it snow in Portland in December 2026?
Portland typically sees 1.3 cm of snowfall during December.

What are the typical wind conditions in Portland during December?
The average wind speed in Portland during December is 13 km/h, suggesting breezy to windy conditions, depending on your activities.

Portland snow forecast December 2026

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 💧
Typically, Portland has 17 rainy days in December with a total of 439.2 mm of rainfall.
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Location coordinates Where is Portland?

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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