Weather Forecast, Duluth

Quick Pick
| Month | Mean Temp °C | Mean Min Temp °C | Mean Max Temp °C | Mean Monthly Prec Days | Mean Monthly Days with Thunder | Mean Monthly Sleet/Snow Days |
| January | -13.9 °C | -19.0 °C | -8.8 °C | n/a | .1 | n/a |
| February | -10.9 °C | -16.2 °C | -5.7 °C | n/a | .1 | n/a |
| March | -4.2 °C | -9.1 °C | .5 °C | n/a | .6 | n/a |
| April | 3.7 °C | -1.7 °C | 9.0 °C | n/a | 1.8 | n/a |
| May | 10.4 °C | 4.2 °C | 16.6 °C | n/a | 3.7 | n/a |
| June | 15.4 °C | 9.2 °C | 21.7 °C | n/a | 6.8 | n/a |
| July | 18.9 °C | 12.8 °C | 25.1 °C | n/a | 8.0 | n/a |
| August | 17.6 °C | 11.8 °C | 23.3 °C | n/a | 7.0 | n/a |
| September | 12.3 °C | 6.9 °C | 17.7 °C | n/a | 3.9 | n/a |
| October | 6.5 °C | 1.7 °C | 11.3 °C | n/a | 1.2 | n/a |
| November | -2.0 °C | -5.8 °C | 1.8 °C | n/a | .4 | n/a |
| December | -10.7 °C | -15.1 °C | -6.3 °C | n/a | .1 | n/a |
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