| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 4b: -25°F to -20°F |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F |
| Average First Frost Date: | Sep.11 - Sep. 20 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate |
| Ecoregion: | 12e - Upper Snake River Plain |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 83442 - Rigby, ID | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 9 | 14 | 22 | 29 | 37 | 44 | 49 | 47 | 38 | 29 | 20 | 10 | 29 |
| Avg Max Temp (°F) | 29 | 35 | 46 | 57 | 67 | 76 | 85 | 84 | 74 | 60 | 42 | 30 | 57 |
| Avg Precip (In.) | 1.1 | .89 | 1.06 | 1.09 | 1.86 | 1.24 | .81 | .81 | .87 | 1 | 1.12 | 1.07 | 12.92 |