| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 8a: 10°F to 15°F |
| 1990 Hardiness Zone: | Zone 8b: 15F to 20F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | 78b - Oak Savanna Foothills |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 97527 - Grants Pass, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 31 | 33 | 34 | 36 | 40 | 46 | 50 | 50 | 44 | 39 | 34 | 31 | 39 |
| Avg Max Temp (°F) | 47 | 53 | 58 | 64 | 72 | 79 | 87 | 88 | 81 | 69 | 52 | 45 | 66 |
| Avg Precip (In.) | 5.16 | 4.39 | 3.7 | 2.06 | 1.27 | .52 | .37 | .46 | .87 | 2.17 | 5.22 | 5.49 | 31.67 |