Weather Averages Iowa City, IA

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Weather Averages for
Iowa City, IA


Latitude: 41°39'N, Longitude: 91°31'W, Elevation: 640.0 ft, Distance: 4.34 mi

  Unit Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average temperature
over 30 years
°F 50 20 25 38 51 62 72 76 73 66 54 40 25
Average high temperature
over 30 years
°F 61 29 35 48 63 74 83 87 85 77 66 49 34
Average low temperature
over 30 years
°F 40 11 16 28 40 50 60 65 62 54 42 31 17
Highest recorded temperature
over 101 years
°F 109 68 73 87 93 105 105 109 107 100 93 80 66
Lowest recorded temperature
over 101 years
°F -32 -31 -32 -16 10 24 37 43 37 19 3 -5 -27
Average number of days above 90°F
over 30 years
days 27 - - - 0.1 0.7 5.5 10 7.5 2.8 0.1 - -
Average precipitation
over 30 years
in 36.3 1.0 1.0 2.4 3.7 4.0 4.5 4.9 4.4 3.9 2.8 2.1 1.6
Average number of days below 32°F
over 30 years
days 135 29 25 21 7.7 0.6 - - - 0.4 5.4 19 28
Average number of days below 0°F
over 30 years
days 15 6.6 4.1 0.4 - - - - - - - 0.2 3.6
Average snowfall
over 30 years
in 26.2 6.3 5.8 4.0 1.7 - - - - - 0.3 1.5 6.6
Most rain reported in a day
over 101 years
in 6.9 2.1 1.9 2.3 4.1 5.3 5.1 6.9 4.3 4.8 2.7 4.7 2.9
Most rain reported in a month
over 101 years
in 62.9 4.6 4.8 6.1 8.3 13.3 10.8 13.4 12.3 10.6 8.2 8.1 4.5
Least rain reported in a month
over 101 years
in 22.1 - 0.1 0.2 0.6 0.5 0.1 0.2 0.4 0.4 - 0.1 0.2
Heating degree days
over 30 years
days 6257 1376 1104 832 410 140 12 2 5 85 338 740 1213
Cooling degree days
over 30 years
days 1069 - - 1 12 73 224 352 276 115 16 - -
Most snow reported in a month
over 101 years
in 53.6 20.5 17.0 20.9 14.3 - - - - - 3.5 12.0 19.5