Weather Averages Altona, IL

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Weather Averages for
Altona, IL



Latitude: 41°10'N, Longitude: 90°3'W, Elevation: 262.1 m, Distance: 4.22 km

  Unit Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average temperature
over 30 years
°C 9 -7 -4 2 9 15 21 23 22 17 11 3 -4
Average high temperature
over 30 years
°C 15 -2 0 7 15 22 27 29 28 24 17 8 0
Average low temperature
over 30 years
°C 3 -12 -9 -3 3 9 15 17 15 11 5 -1 -8
Highest recorded temperature
over 110 years
°C 43 19 21 30 33 40 40 43 40 38 34 28 20
Lowest recorded temperature
over 110 years
°C -33 -30 -33 -24 -12 -4 1 6 3 -5 -12 -21 -32
Average number of days above 27°C
over 30 years
days 25 - - - 0.1 0.8 4.9 9.4 7 2.8 0.1 - -
Average precipitation
over 30 years
cm 95.0 3.8 3.0 7.1 10.4 9.9 10.7 10.7 9.9 10.4 7.1 6.6 5.8
Average number of days below -1.5°C
over 30 years
days 131 28 24 21 7.8 0.6 - - - 0.3 4.8 18 26
Average number of days below -17.5°C
over 30 years
days 13 5.8 3.7 0.3 - - - - - - - 0.1 2.9
Average snowfall
over 30 years
cm 74.7 20.1 16.8 11.9 4.6 - - - - - 0.8 5.3 16.5
Most rain reported in a day
over 110 years
cm 23.4 6.6 5.3 6.6 7.6 7.6 10.9 15.5 23.4 9.1 9.7 7.9 6.9
Most rain reported in a month
over 110 years
cm 132.3 13.0 9.4 14.7 23.1 23.6 27.7 31.8 31.8 29.0 33.0 20.1 13.2
Least rain reported in a month
over 110 years
cm 49.3 0.3 - 0.5 1.8 1.3 1.0 0.8 1.8 0.8 0.3 - 0.3
Heating degree days
over 30 years
days 6572 1392 1120 876 460 182 23 5 11 106 396 765 1236
Cooling degree days
over 30 years
days 889 - - 1 9 60 189 296 225 95 14 - -
Most snow reported in a month
over 110 years
cm 131.1 85.1 56.1 54.4 36.8 - - - - 3.8 15.5 22.9 45.7