WEATHER IN Lewiston
Monthly temperature
| Month | Record low | Average low | Average | Average high | Record high |
| january | -22 (1950) | 30.3 | 36.2 | 42.1 | 66 (1953) |
| february | -18 (1884) | 31.7 | 39.3 | 47.0 | 72 (1986) |
| march | 2 (1955) | 35.7 | 45.4 | 55.1 | 80 (1923) |
| april | 20 (1966) | 40.7 | 51.5 | 62.3 | 99 (1946) |
| may | 23 (1954) | 48.1 | 60.0 | 72.0 | 104 (1934) |
| june | 34 (1951) | 54.0 | 66.5 | 79.0 | 109 (1936) |
| july | 41 (1955) | 60.9 | 75.8 | 90.8 | 117 (1939) |
| august | 41 (1945) | 60.3 | 75.2 | 90.1 | 115 (1961) |
| september | 27 (1926) | 52.3 | 65.9 | 79.5 | 108 (1944) |
| october | 15 (2002) | 42.0 | 52.5 | 63.0 | 94 (1943) |
| november | -3 (1955) | 34.5 | 41.6 | 48.7 | 77 (1999) |
| december | -23 (1919) | 29.5 | 35.2 | 40.8 | 67 (1921) |
| year | -23 (1919) | 42.5 | 53.0 | 63.4 | 117 (1939) |
Monthly precipitation
| Month | Average | Record low | Record high | Daily high |
| january | 1.13 | 0.11 (2007) | 4.46 (1881) | 2.32 (1917) |
| february | 1.04 | 0.13 (1920) | 4.33 (1881) | 0.99 (1897) |
| march | 1.30 | 0.25 (1969) | 4.07 (1931) | 2.18 (1931) |
| april | 1.44 | 0.05 (1956) | 3.38 (1893) | 0.93 (1935) |
| may | 1.69 | 0.00 (1924) | 4.80 (1948) | 1.65 (1897) |
| june | 1.25 | 0.01 (1883) | 5.66 (1884) | 1.72 (1885) |
| july | 0.47 | 0.00 (1883) | 2.60 (1987) | 1.80 (1998) |
| august | 0.51 | 0.00 (1878) | 2.96 (1989) | 1.36 (1960) |
| september | 0.60 | 0.00 (1975) | 4.37 (1940) | 1.73 (1955) |
| october | 1.08 | 0.00 (1978) | 3.42 (1893) | 1.09 (1955) |
| november | 1.23 | 0.00 (1929) | 4.20 (1897) | 1.22 (1996) |
| december | 1.13 | 0.14 (1965) | 6.31 (1880) | 2.71 (1882) |
| year | 12.31 | 7.73 (2007) | 21.71 (1884) | 2.71 (1882) |
Number of days with solid, liquid, and mixed precipitation
| Type of precipitation | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
Wind speed, m/s
| jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
The frequency of different wind directions, %
| direction | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
Air humidity, %
| jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
Snow cover
| Month | jul | aug | sep | oct | nov | dec | jan | feb | mar | apr | may | jun | Year |
| number of days | |||||||||||||
| height (sm) | |||||||||||||
| max height (sm) |
Cloudy, score
| month | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
| total | |||||||||||||
| low |
Number of clear, cloudy and cloudy days
| month | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
| Total cloud | |||||||||||||
| Low cloud | |||||||||||||
Number of days with different phenomena
| phenomenon | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
The frequency of different types of clouds, %
| type of clouds | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |