Boise
The tables below display average monthly climate and weather indicators in Boise Idaho.
Temperature by: Fahrenheit / Centigrade
Boise Temperature |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
Avg. Temperature | -1.7 | 2.2 | 5.8 | 9.5 | 14.2 | 19.2 | 23.3 | 22.5 | 17.0 | 11.0 | 4.4 | -1.1 | 10.5 |
Avg. Max Temperature | 2.4 | 6.8 | 11.6 | 16.3 | 21.7 | 27.2 | 32.3 | 31.2 | 25.0 | 18.1 | 9.3 | 3.2 | 17.1 |
Avg. Min Temperature | -5.8 | -2.5 | -0.1 | 2.6 | 6.6 | 11.2 | 14.3 | 13.8 | 9.0 | 3.9 | -0.5 | -5.3 | 3.9 |
Days with Max Temp of 32 C or Higher | 0.0 | 0.0 | 0.0 | < 0.5 | 1.0 | 5.0 | 19.0 | 16.0 | 3.0 | < 0.5 | 0.0 | 0.0 | 44.0 |
Days with Min Temp Below Freezing | 26.0 | 21.0 | 17.0 | 8.0 | 2.0 | < 0.5 | 0.0 | 0.0 | 0.0 | 6.0 | 18.0 | 25.0 | 123 |
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Boise Heating and Cooling |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
Heating Degree Days | 1116 | 815 | 701 | 477 | 242 | 75.0 | 6.0 | 20.0 | 160 | 414 | 753 | 1082 | 5861 |
Cooling Degree Days | 0.0 | 0.0 | 0.0 | 0.0 | 9.0 | 120 | 285 | 252 | 88.0 | 0.0 | 0.0 | 0.0 | 754 |
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Boise Precipitation |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
Precipitation (inches) | 1.5 | 1.1 | 1.3 | 1.2 | 1.1 | 0.8 | 0.4 | 0.4 | 0.8 | 0.8 | 1.5 | 1.4 | 12.1 |
Days with Precipitation 0.01 inch or More | 12.0 | 10.0 | 10.0 | 8.0 | 8.0 | 6.0 | 3.0 | 2.0 | 4.0 | 6.0 | 10.0 | 11.0 | 90.0 |
Monthly Snowfall (inches) | 6.5 | 3.7 | 1.6 | 0.6 | 0.1 | < 0.05 | < 0.05 | < 0.05 | < 0.05 | 0.1 | 2.3 | 5.9 | 20.8 |
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Other Boise Weather Indicators |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Annual |
Average Wind Speed | 8.0 | 8.9 | 9.9 | 9.9 | 9.4 | 9.0 | 8.4 | 8.2 | 8.2 | 8.3 | 8.4 | 8.1 | 8.7 |
Clear Days | 4.0 | 5.0 | 6.0 | 6.0 | 8.0 | 12.0 | 20.0 | 19.0 | 17.0 | 12.0 | 6.0 | 5.0 | 120 |
Partly Cloudy Days | 5.0 | 6.0 | 7.0 | 9.0 | 10.0 | 10.0 | 7.0 | 8.0 | 7.0 | 8.0 | 6.0 | 6.0 | 90.0 |
Cloudy Days | 22.0 | 17.0 | 18.0 | 15.0 | 13.0 | 8.0 | 3.0 | 4.0 | 6.0 | 11.0 | 18.0 | 20.0 | 155 |
Percent of Possible Sunshine | 40.0 | 51.0 | 62.0 | 68.0 | 70.0 | 75.0 | 87.0 | 85.0 | 82.0 | 69.0 | 43.0 | 38.0 | 64.0 |
Avg. Relative Humidity | 69.5 | 74.5 | 66.5 | 57.0 | 52.5 | 50.0 | 42.0 | 37.0 | 40.5 | 47.5 | 58.0 | 70.5 | 70.0 |
Weather information for other cities in Idaho