| 2023 Hardiness Zone: | Zone 5a: -20°F to -15°F Zone 6b: -5°F to 0°F Zone 4b: -25°F to -20°F Zone 6a: -10°F to -5°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 Zone 6a: -10°F to -5°F Zone 5b: -15°F to -10°F | |
| 1990 Hardiness Zone: | Zone 4b: -25F to -20F | |
| Average First Frost Date: | Aug. 1 - Aug. 10 | |
| Average Last Frost Date: | Jul. 11 - Jul. 20 | |
| Koppen-Geiger Climate Zone: | Dsb - Humid Continental Climate - Dry Cool Summer | |
| Ecoregion: | 16d - Dry Partly Wooded Mountains | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 83340 - Ketchum, ID | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 9 | 12 | 17 | 25 | 33 | 37 | 43 | 43 | 36 | 27 | 16 | 9 | 26 |
| Avg Max Temp (°F) | 32 | 37 | 43 | 51 | 62 | 69 | 80 | 80 | 70 | 57 | 39 | 30 | 54 |
| Avg Precip (In.) | 2.46 | 2.33 | 2.13 | 1.45 | 1.96 | 1.55 | .87 | .89 | 1.19 | 1.2 | 2.15 | 2.58 | 20.77 |