|
Typical Portland December Weather 1991–2020 |
||
|---|---|---|
| Average daily high | 38.0 °F | |
| Average daily low | 21.6 °F | |
| Average monthly precipitation | 4.5 inches | |
| Average monthly snow | 14.8 inches | |
| Daily chance of precipitation | 39.8% | |
| Daily chance of snow | 19.2% | |
|
Portland December Weather Records 1871–2024 |
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|---|---|---|
| Highest temperature | 71 °F | December 6, 2001 |
| Lowest temperature | -21 °F | December 31, 1963 |
| Highest daily low | 49 °F | December 12, 1911 |
| Lowest daily high | -3 °F | December 29, 1917 |
| Hottest average high temperature | 45.8 °F | 2015 |
| Coldest average high temperature | 24.7 °F | 1989 |
| Most daily precipitation | 3.5 inches | December 18, 2012 |
| Most monthly precipitation | 9.7 inches | 1969 |
| Most daily snow | 22.3 inches | December 17, 1970 |
| Most monthly snow | 54.8 inches | 1970 |
| Day | Average (°F) | Record (°F) | ||
|---|---|---|---|---|
| High | Low | High | Low | |
| December 1 | 42.3 | 25.9 | 66 | -3 |
| December 2 | 42.0 | 25.6 | 61 | -1 |
| December 3 | 41.6 | 25.4 | 68 | -4 |
| December 4 | 41.3 | 25.1 | 69 | -16 |
| December 5 | 40.9 | 24.6 | 60 | -1 |
| December 6 | 40.5 | 24.3 | 71 | 4 |
| December 7 | 40.2 | 24.0 | 71 | 0 |
| December 8 | 40.0 | 23.9 | 58 | -8 |
| December 9 | 39.8 | 23.7 | 60 | -14 |
| December 10 | 39.7 | 23.6 | 58 | -8 |
| December 11 | 39.4 | 23.3 | 60 | -6 |
| December 12 | 39.1 | 22.9 | 65 | -15 |
| December 13 | 38.8 | 22.6 | 60 | -5 |
| December 14 | 38.5 | 22.3 | 57 | -9 |
| December 15 | 38.3 | 22.0 | 57 | -3 |
| December 16 | 37.9 | 21.5 | 56 | -9 |
| December 17 | 37.5 | 21.1 | 57 | -12 |
| December 18 | 37.2 | 20.8 | 59 | -10 |
| December 19 | 36.9 | 20.5 | 59 | -13 |
| December 20 | 36.6 | 20.2 | 54 | -20 |
| December 21 | 36.4 | 20.0 | 60 | -14 |
| December 22 | 36.2 | 19.7 | 60 | -14 |
| December 23 | 36.1 | 19.7 | 66 | -9 |
| December 24 | 35.9 | 19.5 | 53 | -13 |
| December 25 | 35.6 | 19.3 | 62 | -16 |
| December 26 | 35.4 | 19.0 | 60 | -20 |
| December 27 | 35.2 | 18.8 | 57 | -8 |
| December 28 | 35.0 | 18.5 | 57 | -13 |
| December 29 | 34.9 | 18.4 | 56 | -18 |
| December 30 | 34.9 | 18.2 | 56 | -21 |
| December 31 | 34.7 | 18.0 | 62 | -21 |