| Month | Average (°F) | Record (°F) | Average (inches) | |||
|---|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | Snow ❄️ | |
| January | 32.0 | 14.8 | 67 | -26 | 3.5 | 18.5 |
| February | 34.7 | 16.5 | 68 | -39 | 3.5 | 17.3 |
| March | 42.0 | 25.1 | 88 | -21 | 4.1 | 13.5 |
| April | 53.5 | 34.6 | 92 | 8 | 4.4 | 2.8 |
| May | 63.9 | 44.7 | 96 | 23 | 3.7 | 0.0 |
| June | 73.3 | 54.2 | 98 | 33 | 4.1 | 0.0 |
| July | 79.2 | 60.4 | 103 | 40 | 3.4 | 0.0 |
| August | 78.4 | 59.0 | 103 | 33 | 3.6 | 0.0 |
| September | 70.8 | 51.4 | 96 | 23 | 3.8 | 0.0 |
| October | 59.2 | 40.3 | 88 | 15 | 5.2 | 0.2 |
| November | 48.1 | 30.9 | 75 | -6 | 4.2 | 2.3 |
| December | 38.0 | 21.6 | 71 | -21 | 4.5 | 14.8 |
| Entire year | 56.2 | 37.9 | 103 | -39 | 48.1 | 69.4 |
|
More Portland Weather Records
1871–2024
|
||
|---|---|---|
| Highest daily low | 79 °F | July 4, 1911 |
| Lowest daily high | -4 °F | February 5, 1918 |
| Greatest daily range (Difference of high and low) |
54 °F | March 29, 1946 |
| Greatest difference in daily high over two conscutive days |
41 °F | Feb 20–21, 1918 |
| Most daily precipitation | 11.7 inches | October 21, 1996 |
| Most monthly precipitation | 16.9 inches | October 1996 |
| Most yearly precipitation | 66.4 inches | 2005 |
| Most yearly days with precipitation | 169 | 1933 |
| Earliest snow in season | October 10 | 1979 |
| Latest snow in season | May 11 | 1945 |
| Most daily snow | 22.3 inches | December 17, 1970 |
| Most monthly snow | 62.4 inches | January 1979 |
| Most yearly snow | 150.1 inches | 1956 |
| Most snow in a winter | 141.5 inches | 1970–1971 |
| Greatest snow accumulation | 55.0 inches | January 17, 1923 |
| Earliest freeze | September 14 | 1963 |
| Earliest day ≥ 70 °F | March 9 | 2020 |
| Earliest day ≥ 80 °F | March 22 | 2012 |
| Earliest day ≥ 90 °F | April 28 | 2009 |
| Latest freeze | May 31 | 1961 |
| Latest day ≥ 70 °F | December 7 | 1998 |
| Latest day ≥ 80 °F | October 31 | 1946 |
| Latest day ≥ 90 °F | September 26 | 2007 |
| Most days in a year < 0 °F | 30 | 1948 |
| Most days in a year < 32 °F | 170 | 1964 |
| Most days in a year ≥ 80 °F | 63 | 1991 |
| Most days in a year ≥ 90 °F | 16 | 1955 |
| Most days in a year ≥ 100 °F | 2 | 1948 |
|
Portland Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 14 days | Nov 2–15, 1969 |
| Without precipitation | 28 days | Oct 1–28, 1947 |
| With snow | 7 days | Feb 22–28, 1946 |
| High temperature at or below freezing |
30 days | Jan 13 – Feb 11, 1918 |
| High temperature ≥ 80 °F | 22 days | Jul 19 – Aug 9, 2022 |
| High temperature ≥ 90 °F | 5 days | Aug 29 – Sep 2, 2010 |