| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F |
| 2012 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F |
| Average First Frost Date: | Sep.1 - Sep. 10 |
| Average Last Frost Date: | Jun. 21 - Jun. 30 |
| Koppen-Geiger Climate Zone: | Dsb - Humid Continental Climate - Dry Cool Summer |
| Ecoregion: | 9g - Klamath/Goose Lake Basins |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 97601 - Klamath Falls, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 21 | 24 | 27 | 30 | 37 | 43 | 49 | 47 | 40 | 32 | 26 | 21 | 33 |
| Avg Max Temp (°F) | 39 | 45 | 50 | 57 | 66 | 75 | 84 | 84 | 75 | 64 | 47 | 39 | 61 |
| Avg Precip (In.) | 1.95 | 1.4 | 1.49 | .91 | 1.07 | .72 | .37 | .49 | .58 | .85 | 1.84 | 1.93 | 13.58 |