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 | 29.0 | 35.9 | 42.4 | 49.1 | 57.5 | 66.5 | 74.0 | 72.5 | 62.6 | 51.8 | 39.9 | 30.1 | 50.9 |
| Avg. Max Temperature | 36.4 | 44.2 | 52.9 | 61.4 | 71.0 | 80.9 | 90.2 | 88.1 | 77.0 | 64.6 | 48.7 | 37.7 | 62.8 |
| Avg. Min Temperature | 21.6 | 27.5 | 31.9 | 36.7 | 43.9 | 52.1 | 57.7 | 56.8 | 48.2 | 39.0 | 31.1 | 22.5 | 39.1 |
| Days with Max Temp of 90 F 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