|
Typical Portland May Weather 1991–2020 |
||
|---|---|---|
| Average daily high | 63.9 °F | |
| Average daily low | 44.7 °F | |
| Average monthly precipitation | 3.7 inches | |
| Average monthly snow | none | |
| Daily chance of precipitation | 40.2% | |
| Daily chance of snow | 0% | |
|
Portland May Weather Records 1871–2024 |
||
|---|---|---|
| Highest temperature | 96 °F | May 31, 1937 |
| Lowest temperature | 23 °F | May 9, 1956 |
| Highest daily low | 67 °F | May 7, 1930 |
| Lowest daily high | 38 °F | May 9, 1966 |
| Hottest average high temperature | 71.3 °F | 2015 |
| Coldest average high temperature | 54.6 °F | 1917 |
| Most daily precipitation | 4.8 inches | May 17, 1916 |
| Most monthly precipitation | 12.3 inches | 2006 |
| Most daily snow | 5.0 inches | May 11, 1945 |
| Most monthly snow | 7.0 inches | 1945 |
| Day | Average (°F) | Record (°F) | ||
|---|---|---|---|---|
| High | Low | High | Low | |
| May 1 | 58.9 | 39.9 | 78 | 26 |
| May 2 | 59.1 | 40.2 | 91 | 25 |
| May 3 | 59.5 | 40.5 | 92 | 24 |
| May 4 | 59.7 | 40.8 | 84 | 26 |
| May 5 | 59.9 | 41.1 | 82 | 28 |
| May 6 | 60.2 | 41.3 | 88 | 28 |
| May 7 | 60.6 | 41.6 | 86 | 28 |
| May 8 | 60.9 | 41.9 | 87 | 27 |
| May 9 | 61.2 | 42.2 | 92 | 23 |
| May 10 | 61.6 | 42.5 | 92 | 24 |
| May 11 | 62.0 | 42.9 | 83 | 29 |
| May 12 | 62.4 | 43.3 | 88 | 29 |
| May 13 | 62.8 | 43.6 | 83 | 28 |
| May 14 | 63.1 | 44.0 | 84 | 28 |
| May 15 | 63.5 | 44.4 | 88 | 27 |
| May 16 | 63.9 | 44.7 | 90 | 28 |
| May 17 | 64.2 | 45.0 | 90 | 27 |
| May 18 | 64.5 | 45.3 | 93 | 30 |
| May 19 | 64.8 | 45.6 | 86 | 28 |
| May 20 | 65.0 | 45.8 | 86 | 32 |
| May 21 | 65.2 | 46.0 | 93 | 33 |
| May 22 | 65.3 | 46.3 | 91 | 34 |
| May 23 | 65.5 | 46.6 | 89 | 34 |
| May 24 | 65.9 | 46.8 | 91 | 30 |
| May 25 | 66.3 | 47.1 | 92 | 27 |
| May 26 | 66.6 | 47.4 | 92 | 30 |
| May 27 | 67.0 | 47.7 | 94 | 32 |
| May 28 | 67.5 | 48.1 | 90 | 35 |
| May 29 | 67.9 | 48.5 | 91 | 35 |
| May 30 | 68.2 | 48.9 | 90 | 33 |
| May 31 | 68.5 | 49.2 | 96 | 31 |