| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°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.11 - Sep. 20 |
| Average Last Frost Date: | Jun. 11 - Jun. 20 |
| Koppen-Geiger Climate Zone: | Dsb - Humid Continental Climate - Dry Cool Summer |
| Ecoregion: | 9g - Klamath/Goose Lake Basins |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 97603 - Klamath Falls, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 20 | 24 | 27 | 30 | 36 | 43 | 48 | 46 | 40 | 32 | 26 | 20 | 33 |
| Avg Max Temp (°F) | 40 | 44 | 50 | 57 | 66 | 75 | 84 | 83 | 76 | 64 | 47 | 40 | 60 |
| Avg Precip (In.) | 1.74 | 1.32 | 1.28 | .82 | .87 | .72 | .35 | .55 | .55 | .81 | 1.73 | 1.6 | 12.34 |