| Month | Average (°F) | Record (°F) | Average (inches) | |||
|---|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | Snow ❄️ | |
| January | 46.9 | 36.1 | 66 | -2 | 5.0 | 1.7 |
| February | 50.9 | 36.6 | 71 | -3 | 3.7 | 1.2 |
| March | 56.2 | 39.6 | 83 | 19 | 4.0 | 0.1 |
| April | 61.4 | 43.5 | 93 | 28 | 2.9 | 0.0 |
| May | 68.8 | 49.4 | 100 | 29 | 2.5 | 0.0 |
| June | 73.7 | 54.1 | 116 | 39 | 1.6 | 0.0 |
| July | 81.4 | 58.4 | 107 | 43 | 0.5 | 0.0 |
| August | 81.8 | 58.8 | 108 | 43 | 0.5 | 0.0 |
| September | 76.2 | 54.1 | 105 | 34 | 1.5 | 0.0 |
| October | 63.9 | 46.7 | 92 | 26 | 3.4 | 0.0 |
| November | 52.9 | 40.6 | 73 | 11 | 5.5 | 0.0 |
| December | 46.3 | 36.1 | 67 | 3 | 5.8 | 1.2 |
| Entire year | 63.4 | 46.2 | 116 | -3 | 36.9 | 4.3 |
|
More Portland Weather Records
1871–2024
|
||
|---|---|---|
| Highest daily low | 75 °F | June 28, 2021 |
| Lowest daily high | 9 °F | January 15, 1888 |
| Greatest daily range (Difference of high and low) |
48 °F | September 2, 1988 |
| Greatest difference in daily high over two conscutive days |
33 °F | Jul 18–19, 1944 |
| Most daily precipitation | 6.7 inches | December 13, 1882 |
| Most monthly precipitation | 20.1 inches | December 1882 |
| Most yearly precipitation | 67.2 inches | 1882 |
| Most yearly days with precipitation | 191 | 2010 |
| Earliest snow in season | October 5 | 1950 |
| Latest snow in season | May 8 | 1953 |
| Most daily snow | 15.0 inches | January 2, 1895 |
| Most monthly snow | 41.4 inches | January 1950 |
| Most yearly snow | 49.3 inches | 1916 |
| Most snow in a winter | 60.9 inches | 1892–1893 |
| Greatest snow accumulation | 19.0 inches | February 6, 1893 |
| Earliest freeze | October 9 | 1985 |
| Earliest day ≥ 80 °F | March 16 | 1947 |
| Earliest day ≥ 90 °F | April 20 | 1934 |
| Earliest day ≥ 100 °F | May 28 | 1983 |
| Latest freeze | May 1 | 1954 |
| Latest day ≥ 80 °F | October 21 | 2003 |
| Latest day ≥ 90 °F | October 5 | 1980 |
| Latest day ≥ 100 °F | September 5 | 1944 |
| Most days in a year < 0 °F | 2 | 1950 |
| Most days in a year < 32 °F | 80 | 1985 |
| Most days in a year ≥ 80 °F | 95 | 2023 |
| Most days in a year ≥ 90 °F | 31 | 2018 |
| Most days in a year ≥ 100 °F | 5 | 2022 |
| Most days in a year ≥ 110 °F | 2 | 2021 |
|
Portland Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 40 days | Feb 6 – Mar 16, 1872 |
| Without precipitation | 71 days | Jun 23 – Sep 1, 1967 |
| With snow | 14 days | Jan 26 – Feb 8, 1893 |
| High temperature at or below freezing |
19 days | Jan 8–26, 1930 |
| High temperature ≥ 80 °F | 23 days | Jul 1–23, 1985 |
| High temperature ≥ 90 °F | 10 days | Jul 25 – Aug 3, 2009 |
| High temperature ≥ 100 °F | 5 days | Jul 13–17, 1941 |