WEATHER IN Duluth
Monthly temperature
| Month | Record low | Average low | Average | Average high | Record high |
| january | -41 (1885) | 2.4 | 11.2 | 19.9 | 55 (1942) |
| february | -39 (1996) | 6.0 | 15.4 | 24.8 | 58 (1895) |
| march | -29 (1989) | 17.8 | 27.0 | 36.2 | 81 (1946) |
| april | -5 (1954) | 29.9 | 39.5 | 49.2 | 88 (1952) |
| may | 16 (1907) | 41.0 | 52.0 | 63.0 | 95 (1939) |
| june | 27 (1972) | 50.2 | 61.2 | 72.1 | 97 (1910) |
| july | 35 (1988) | 56.2 | 67.0 | 77.7 | 106 (1936) |
| august | 32 (1986) | 55.2 | 65.5 | 75.8 | 97 (1930) |
| september | 23 (1962) | 47.3 | 57.2 | 67.2 | 95 (1976) |
| october | 6 (1917) | 35.6 | 44.1 | 52.7 | 86 (1953) |
| november | -29 (1875) | 22.5 | 29.8 | 37.1 | 73 (1903) |
| december | -35 (1917) | 9.6 | 17.1 | 24.7 | 56 (1939) |
| year | -41 (1885) | 30.4 | 39.6 | 48.7 | 106 (1936) |
Monthly precipitation
| Month | Average | Record low | Record high | Daily high |
| january | 0.95 | 0.13 (2008) | 4.70 (1969) | 1.18 (1969) |
| february | 1.01 | 0.10 (1877) | 4.24 (1922) | 1.16 (1998) |
| march | 1.46 | 0.22 (1959) | 5.12 (1965) | 2.24 (1977) |
| april | 2.53 | 0.24 (1987) | 8.18 (2001) | 2.61 (1948) |
| may | 3.37 | 0.15 (1976) | 7.99 (1879) | 3.93 (2010) |
| june | 4.39 | 0.11 (1910) | 10.89 (1874) | 4.14 (2012) |
| july | 3.92 | 0.47 (1875) | 10.83 (1909) | 5.20 (1909) |
| august | 3.73 | 0.29 (1930) | 10.31 (1972) | 3.22 (1939) |
| september | 3.48 | 0.19 (1952) | 11.52 (1881) | 3.97 (1876) |
| october | 2.91 | 0.09 (1895) | 7.53 (1949) | 2.94 (2010) |
| november | 1.96 | 0.09 (1916) | 5.08 (2000) | 2.26 (1998) |
| december | 1.47 | 0.07 (1905) | 3.89 (1879) | 1.91 (1950) |
| year | 30.96 | 18.11 (1910) | 45.28 (1879) | 5.20 (1909) |
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 |