Weather Averages Altamont, IL

Weather Reports

Enter Location or Click Browse
Weather Averages for
Altamont, IL


Latitude: 39°7'N, Longitude: 88°31'W, Elevation: 620.0 ft, Distance: 12.59 mi

  Unit Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average temperature
over 30 years
°F 52 25 29 41 53 63 72 76 74 66 55 43 31
Average high temperature
over 30 years
°F 63 34 39 51 64 74 84 87 85 78 67 53 39
Average low temperature
over 30 years
°F 42 16 19 31 42 51 61 65 62 55 43 33 22
Highest recorded temperature
over 104 years
°F 111 71 78 89 91 98 105 111 109 105 95 82 73
Lowest recorded temperature
over 104 years
°F -29 -29 -20 -11 21 28 35 44 39 23 15 -5 -16
Average number of days above 90°F
over 30 years
days 39 - - - - 1.2 8.1 13 11 4.8 0.3 - -
Average precipitation
over 30 years
in 40.1 2.1 2.3 3.8 3.7 4.1 4.2 4.1 2.8 3.1 2.8 3.5 3.6
Average number of days below 32°F
over 30 years
days 103 24 21 15 4.1 0.3 - - - 0.1 3.5 13 22
Average number of days below 0°F
over 30 years
days 5.2 2.5 1.5 0.1 - - - - - - - - 1.1
Average snowfall
over 30 years
in 21.2 7.1 5.5 3.2 0.2 - - - - - - 1.2 4.7
Most rain reported in a day
over 105 years
in 5.7 3.8 2.7 3.3 3.4 4.4 5.0 3.8 5.7 5.2 4.0 3.2 3.3
Most rain reported in a month
over 105 years
in 65.2 10.0 6.0 12.8 9.6 12.9 12.5 9.6 10.3 13.6 9.6 10.4 9.9
Least rain reported in a month
over 105 years
in 18.5 0.1 0.2 0.6 0.9 0.6 0.3 0.3 - 0.2 0.1 0.3 0.3
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
in 43.5 23.7 21.5 17.2 3.0 - - - - - 1.0 13.5 25.5