| 2023 Hardiness Zone: | Zone 5b: -15°F to -10°F | |
| 2012 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 4a: -30F to -25F | |
| Average First Frost Date: | Sep.11 - Sep. 20 | |
| Average Last Frost Date: | Jun. 1 - Jun. 10 | |
| Koppen-Geiger Climate Zone: | BSk - Cold Semi-Arid Climate | |
| Ecoregion: | 12e - Upper Snake River Plain | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 83404 - Idaho Falls, ID | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 12 | 16 | 24 | 31 | 38 | 46 | 51 | 49 | 41 | 31 | 22 | 13 | 31 |
| Avg Max Temp (°F) | 29 | 36 | 47 | 58 | 67 | 77 | 85 | 85 | 74 | 61 | 43 | 31 | 58 |
| Avg Precip (In.) | 1.15 | .95 | 1.21 | 1.18 | 1.89 | 1.14 | .72 | .87 | .87 | 1.05 | 1.09 | 1.13 | 13.26 |