Nampa, ID Weather & Climate Normals
Nampa's real weather, in one number
Nampa, ID scores 42/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 4 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
Nampa's hottest and coldest months
Nampa's hottest month is Jul, averaging 75°F; its coldest is Jan, averaging 31°F, a 44°F swing across the year, a middling gap by national standards.
Nampa's weather across the year
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 40°F | 23°F | 1.37in | 3.4in |
| Feb | 47°F | 26°F | 1.04in | 1.4in |
| Mar | 57°F | 32°F | 1.26in | 0.2in |
| Apr | 65°F | 36°F | 1.06in | 0in |
| May | 74°F | 44°F | 1.37in | 0in |
| Jun | 83°F | 51°F | 0.73in | 0in |
| Jul | 93°F | 57°F | 0.26in | 0in |
| Aug | 92°F | 56°F | 0.2in | 0in |
| Sep | 81°F | 47°F | 0.36in | 0in |
| Oct | 67°F | 37°F | 0.8in | 0in |
| Nov | 51°F | 28°F | 1.17in | 0.5in |
| Dec | 40°F | 23°F | 1.39in | 4.2in |
May, Jun, Aug, and Sep are the best time to see Nampa at its mildest; the rest of the year, plan around Jul's heat and Jan's cold.
Rain and snow in Nampa
Nampa averages 11.01in of precipitation a year across roughly 82 days with measurable rain or snow, and 9.7in of snow a year.
Where Nampa ranks
Nampa ranks 4158 of 4876 US cities in this dataset for comfort score, and 19 of 36 within ID. About 117,350 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from Nampa Sugar Factory, ID US, 1.3 miles from Nampa, not a prediction for any specific day.
More on how this is worked out
How the comfort score is calculated · Why some cities show no snow or rain figure