Portland, OR
Climate overview — based on NOAA 1991-2020 normals from PORTLAND KGW-TV, OR US.
Year-round temperatures (°F)
Climate summary
Portland has an annual average temperature of 54.8°F with about 44.1 inches of precipitation per year and 3.6 inches of snow. The warmest month is August (average high 80.6°F), and the coldest is January (average low 37.3°F). December is typically the wettest month (7.35 in) and July the driest (0.43 in). Snow typically falls from December through February.
Best time to visit Portland
Full guide →Climate change signal
All-time records →84 of 366 (23%) of Portland's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1970s | 50 | |
| 1980s | 75 | |
| 1990s | 75 | |
| 2000s | 65 | |
| 2010s | 55 | |
| 2020s | 46 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 46.9°F | 37.3°F | 42.1°F | 6.36 in | 1.3 in | 20 |
| February | 50.5°F | 38.8°F | 44.7°F | 4.74 in | 1.4 in | 16 |
| March | 55.8°F | 40.9°F | 48.3°F | 4.83 in | — | 18 |
| April | 60.7°F | 44.2°F | 52.5°F | 3.63 in | — | 17 |
| May | 68.0°F | 49.4°F | 58.7°F | 2.58 in | — | 12 |
| June | 72.9°F | 53.3°F | 63.1°F | 1.49 in | — | 9 |
| July | 80.3°F | 57.9°F | 69.1°F | 0.43 in | — | 3 |
| August | 80.6°F | 58.6°F | 69.6°F | 0.54 in | — | 3 |
| September | 74.9°F | 55.1°F | 65.0°F | 1.58 in | — | 7 |
| October | 62.9°F | 47.9°F | 55.4°F | 3.96 in | — | 13 |
| November | 52.3°F | 41.6°F | 46.9°F | 6.58 in | — | 19 |
| December | 45.9°F | 37.3°F | 41.6°F | 7.35 in | 0.9 in | 20 |
Climate twins of Portland
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).