Waterloo
The tables below display average monthly climate and weather indicators in Waterloo Iowa.
Temperature by: Fahrenheit / Centigrade
| Waterloo Temperature |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Avg. Temperature | -9.7 | -6.6 | 1.2 | 9.1 | 15.7 | 20.6 | 22.8 | 21.3 | 16.6 | 10.1 | 2.1 | -6.5 | 8.1 |
| Avg. Max Temperature | -4.6 | -1.4 | 6.3 | 15.2 | 22.0 | 26.9 | 28.8 | 27.5 | 23.2 | 16.6 | 7.3 | -1.7 | 13.8 |
| Avg. Min Temperature | -14.8 | -11.9 | -3.9 | 2.8 | 9.3 | 14.2 | 16.8 | 15.0 | 10.0 | 3.6 | -3.2 | -11.3 | 2.2 |
| Days with Max Temp of 32 C or Higher | 0.0 | 0.0 | 0.0 | < 0.5 | 1.0 | 4.0 | 6.0 | 4.0 | 1.0 | < 0.5 | 0.0 | 0.0 | 16.0 |
| Days with Min Temp Below Freezing | 31.0 | 27.0 | 24.0 | 11.0 | 1.0 | 0.0 | 0.0 | 0.0 | 1.0 | 9.0 | 22.0 | 30.0 | 156 |
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| Waterloo Heating and Cooling |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Heating Degree Days | 1562 | 1257 | 955 | 501 | 203 | 27.0 | 10.0 | 29.0 | 127 | 470 | 879 | 1386 | 7406 |
| Cooling Degree Days | 0.0 | 0.0 | 0.0 | 0.0 | 55.0 | 150 | 261 | 194 | 34.0 | 8.0 | 0.0 | 0.0 | 702 |
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| Waterloo Precipitation |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Precipitation (inches) | 0.8 | 1.1 | 2.3 | 3.3 | 4.1 | 4.5 | 4.8 | 3.6 | 3.5 | 2.6 | 1.8 | 1.3 | 33.7 |
| Days with Precipitation 0.01 inch or More | 7.0 | 7.0 | 9.0 | 10.0 | 11.0 | 10.0 | 9.0 | 9.0 | 9.0 | 7.0 | 7.0 | 7.0 | 104 |
| Monthly Snowfall (inches) | 7.5 | 6.6 | 5.8 | 1.6 | 0.0 | < 0.05 | 0.0 | 0.0 | 0.0 | 0.1 | 3.6 | 7.3 | 32.5 |
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| Other Waterloo Weather Indicators |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
| Average Wind Speed | 11.4 | 11.4 | 12.3 | 12.6 | 11.1 | 9.8 | 8.4 | 8.3 | 9.0 | 10.2 | 11.1 | 11.1 | 10.6 |
| Clear Days | 8.0 | 7.0 | 6.0 | 6.0 | 7.0 | 7.0 | 9.0 | 9.0 | 10.0 | 10.0 | 5.0 | 7.0 | 91.0 |
| Partly Cloudy Days | 7.0 | 6.0 | 7.0 | 8.0 | 9.0 | 11.0 | 12.0 | 11.0 | 8.0 | 8.0 | 7.0 | 6.0 | 100 |
| Cloudy Days | 16.0 | 15.0 | 18.0 | 16.0 | 14.0 | 12.0 | 11.0 | 11.0 | 12.0 | 14.0 | 18.0 | 18.0 | 174 |
| Percent of Possible Sunshine | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Avg. Relative Humidity | 58.5 | 75.5 | 76.0 | 73.5 | 69.0 | 70.0 | 72.0 | 75.0 | 75.0 | 72.5 | 70.5 | 74.5 | 78.0 |
Weather information for other cities in Iowa