Weather Averages Altamont, IL

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Weather Averages for
Altamont, IL



Latitude: 39°7'N, Longitude: 88°31'W, Elevation: 189.0 m, Distance: 7.82 km

  Unit Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average temperature
over 30 years
°C 11 -3 -1 5 11 17 22 24 23 19 12 6 0
Average high temperature
over 30 years
°C 17 1 4 10 18 23 28 30 29 26 19 11 4
Average low temperature
over 30 years
°C 5 -8 -6 0 5 10 16 18 17 12 6 0 -5
Highest recorded temperature
over 104 years
°C 43 22 25 31 32 36 41 43 43 40 35 28 23
Lowest recorded temperature
over 104 years
°C -33 -33 -29 -23 -6 -2 1 7 3 -5 -9 -21 -27
Average number of days above 27°C
over 30 years
days 39 - - - - 1.2 8.1 13 11 4.8 0.3 - -
Average precipitation
over 30 years
cm 101.9 5.3 5.8 9.7 9.4 10.4 10.7 10.4 7.1 7.9 7.1 8.9 9.1
Average number of days below -1.5°C
over 30 years
days 103 24 21 15 4.1 0.3 - - - 0.1 3.5 13 22
Average number of days below -17.5°C
over 30 years
days 5.2 2.5 1.5 0.1 - - - - - - - - 1.1
Average snowfall
over 30 years
cm 53.8 18.0 14.0 8.1 0.5 - - - - - - 3.0 11.9
Most rain reported in a day
over 105 years
cm 14.5 9.7 6.9 8.4 8.6 11.2 12.7 9.7 14.5 13.2 10.2 8.1 8.4
Most rain reported in a month
over 105 years
cm 165.6 25.4 15.2 32.5 24.4 32.8 31.8 24.4 26.2 34.5 24.4 26.4 25.1
Least rain reported in a month
over 105 years
cm 47.0 0.3 0.5 1.5 2.3 1.5 0.8 0.8 - 0.5 0.3 0.8 0.8
Heating degree days
over 30 years
days 5430 1206 968 704 349 127 13 1 4 67 317 635 1039
Cooling degree days
over 30 years
days 1169 - - 3 20 82 244 361 291 144 23 1 -
Most snow reported in a month
over 105 years
cm 110.5 60.2 54.6 43.7 7.6 - - - - - 2.5 34.3 64.8