| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F | |
| 1990 Hardiness Zone: | Zone 7a: 0F to 5F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | Jun. 1 - Jun. 10 | |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate | |
| Ecoregion: | 4f - Southern Cascades | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 97536 - Prospect, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 28 | 29 | 31 | 33 | 36 | 42 | 48 | 48 | 44 | 37 | 32 | 28 | 36 |
| Avg Max Temp (°F) | 45 | 49 | 53 | 56 | 62 | 71 | 81 | 83 | 79 | 66 | 49 | 44 | 62 |
| Avg Precip (In.) | 6.05 | 4.99 | 4.51 | 3.04 | 2.57 | 1.16 | .61 | .83 | 1.31 | 3 | 6.25 | 6.79 | 41.11 |