Rainy days · Oregon
How often does it rain in Portland, Oregon?
Portland’s rain is soft, constant and slightly smug about how locally sourced it is.
Portland, Oregon gets measurable rain or snow on about 156 days a year, adding up to about 37 inches.
November usually brings Portland about 18 wet days and 5.5 inches. The wettest month is usually December, with about 19 wet days, and the driest is July, with about 4 wet days. That makes Portland number 12 of the 129 US cities we track, rainiest first.
Last updated
Rain is in the forecast for the next 48 hours.
Live 48-hour check from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Rainy days, month by month
| Month | Wet days | Inches |
|---|---|---|
| January | 19 | 5.0 |
| February | 16 | 3.7 |
| March | 18 | 4.0 |
| April | 17 | 2.9 |
| May | 13 | 2.5 |
| June | 9 | 1.6 |
| July | 4 | 0.5 |
| August | 4 | 0.5 |
| September | 7 | 1.5 |
| October | 14 | 3.4 |
| November | 18 | 5.5 |
| December | 19 | 5.8 |
Cities with about as many rainy days
- Seattle, Washington: about 156 wet days a year
- Burlington, Vermont: about 157 wet days a year
- Cleveland, Ohio: about 158 wet days a year
Source: NOAA daily precipitation records for the Portland area, 1991 to 2020 (at least 30 complete years behind every month), via the Applied Climate Information System. A wet day here means at least a hundredth of an inch of rain or melted snow.