Weather Averages Annapolis, IL

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Weather Averages for
Annapolis, IL



Latitude: 39°0'N, Longitude: 87°37'W, Elevation: 158.5 m, Distance: 8.08 km

  Unit Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average temperature
over 30 years
°C 12 -3 0 6 12 17 23 24 23 19 13 6 0
Average high temperature
over 30 years
°C 17 2 4 11 18 24 29 31 29 26 20 12 4
Average low temperature
over 30 years
°C 6 -8 -6 0 6 11 16 18 17 12 6 1 -4
Highest recorded temperature
over 105 years
°C 45 23 25 31 34 36 42 45 42 41 35 33 23
Lowest recorded temperature
over 105 years
°C -32 -29 -32 -24 -6 -2 1 3 5 -3 -8 - -30
Average number of days above 27°C
over 30 years
days 46 - - - 0.1 1.9 9.9 16 13 5.6 0.4 - -
Average precipitation
over 30 years
cm 107.7 5.6 6.3 10.7 9.9 11.4 9.4 11.7 9.1 8.4 7.4 9.1 8.6
Average number of days below -1.5°C
over 30 years
days 104 25 21 15 3.8 0.1 - - - 0.1 3.4 13 22
Average number of days below -17.5°C
over 30 years
days 4.2 2.1 1.1 0.1 - - - - - - - - 1
Average snowfall
over 30 years
cm 55.9 16.3 15.2 8.9 1.0 - - - - - - 3.0 11.2
Most rain reported in a day
over 105 years
cm 15.5 9.1 6.3 12.2 6.9 10.2 8.1 15.5 12.4 10.4 8.9 10.4 9.9
Most rain reported in a month
over 105 years
cm 150.1 30.5 19.3 29.2 24.9 28.4 25.9 32.0 25.4 29.2 27.9 29.0 24.1
Least rain reported in a month
over 105 years
cm 64.5 - 0.3 0.5 2.5 1.3 1.5 - - 0.3 0.3 1.5 0.5
Heating degree days
over 30 years
days 5031 1148 915 633 311 104 10 1 2 62 277 588 980
Cooling degree days
over 30 years
days 1248 - - 3 25 100 258 370 319 147 25 1 -
Most snow reported in a month
over 105 years
cm 108.0 53.3 49.5 52.1 15.2 - - - - - 5.1 19.1 39.4