Typical Weather in Portland, OR in December
45° F Avg High
37° F Avg Low
13 Rainy Days
☀️ Temperature Summary
Compared to other months, Portland experiences cooler conditions in December, with daytime highs averaging 45°F. You can expect overnight lows near 37°F most days. This is the coldest month of the year in Portland.
High Temps Throughout the Year
☔ Rain Summary
Don't forget to pack an umbrella! In December you can expect close to a 42% chance of rain for any given day. It rains more than usual in December, with total rainfall for the month typically near 7 inches.
Rainfall Throughout the Year
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📍 Nearby Cities in December
40°F
/
23°F
38°F
/
23°F
46°F
/
34°F
55°F
/
41°F
41°F
/
29°F
39°F
/
22°F
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