| Month | Average (°F) | Record (°F) | Average (inches) | |||
|---|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | Snow ❄️ | |
| January | 41.9 | 30.0 | 66 | -22 | 1.1 | 2.7 |
| February | 46.8 | 31.4 | 72 | -15 | 1.0 | 3.8 |
| March | 54.8 | 35.5 | 78 | 2 | 1.3 | 0.8 |
| April | 62.0 | 40.5 | 99 | 20 | 1.4 | 0.0 |
| May | 71.7 | 47.7 | 104 | 23 | 1.7 | 0.0 |
| June | 78.7 | 53.8 | 115 | 34 | 1.3 | 0.0 |
| July | 90.6 | 60.5 | 117 | 41 | 0.5 | 0.0 |
| August | 89.7 | 60.0 | 115 | 41 | 0.5 | 0.0 |
| September | 79.1 | 52.0 | 108 | 28 | 0.6 | 0.0 |
| October | 62.6 | 41.7 | 94 | 15 | 1.1 | 0.0 |
| November | 48.4 | 34.1 | 77 | -3 | 1.2 | 1.2 |
| December | 40.5 | 29.2 | 66 | -22 | 1.1 | 3.8 |
| Entire year | 64.0 | 43.1 | 117 | -22 | 12.8 | 12.3 |
|
More Lewiston Weather Records
1894–2024
|
||
|---|---|---|
| Highest daily low | 79 °F | July 1, 2021 |
| Lowest daily high | -8 °F | December 30, 1968 |
| Greatest daily range (Difference of high and low) |
55 °F | August 18, 1946 |
| Greatest difference in daily high over two conscutive days |
33 °F | Feb 7–8, 1936 |
| Most daily precipitation | 1.8 inches | July 10, 1998 |
| Most monthly precipitation | 4.8 inches | May 1948 |
| Most yearly precipitation | 21.4 inches | 1940 |
| Most yearly days with precipitation | 132 | 1950 |
| Earliest snow in season | October 27 | 1971 |
| Latest snow in season | April 20 | 1961 |
| Most daily snow | 9.0 inches | February 6, 1899 |
| Most monthly snow | 31.3 inches | February 2019 |
| Most yearly snow | 40.6 inches | 1955 |
| Most snow in a winter | 49.8 inches | 1955–1956 |
| Greatest snow accumulation | 16.0 inches | January 26, 1957 |
| Earliest freeze | September 17 | 1965 |
| Earliest day ≥ 80 °F | April 2 | 1992 |
| Earliest day ≥ 90 °F | April 17 | 1936 |
| Earliest day ≥ 100 °F | May 16 | 1939 |
| Latest freeze | May 12 | 1985 |
| Latest day ≥ 80 °F | October 22 | 2003 |
| Latest day ≥ 90 °F | October 10 | 1934 |
| Latest day ≥ 100 °F | September 24 | 2011 |
| Most days in a year < 0 °F | 15 | 1950 |
| Most days in a year < 32 °F | 129 | 1985 |
| Most days in a year ≥ 80 °F | 130 | 1936 |
| Most days in a year ≥ 90 °F | 81 | 1938 |
| Most days in a year ≥ 100 °F | 27 | 1942 |
| Most days in a year ≥ 110 °F | 3 | 2021 |
|
Lewiston Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 12 days | Jan 10–21, 1978 |
| Without precipitation | 83 days | Jul 21 – Oct 11, 2012 |
| With snow | 7 days | Feb 15–21, 2019 |
| High temperature at or below freezing |
17 days | Jan 14–30, 1957 |
| High temperature ≥ 80 °F | 79 days | Jun 24 – Sep 10, 1967 |
| High temperature ≥ 90 °F | 36 days | Jul 18 – Aug 22, 1898 |
| High temperature ≥ 100 °F | 11 days | Jun 26 – Jul 6, 2021 |
| High temperature ≥ 110 °F | 3 days | Jun 28–30, 2021 |