| 2023 Hardiness Zone: | 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 8a: 10°F to 15°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 7b: 5F to 10F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | 4a - Western Cascades Lowlands and Valleys |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 97067 - Welches, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 30 | 31 | 33 | 36 | 41 | 46 | 50 | 51 | 48 | 41 | 35 | 31 | 39 |
| Avg Max Temp (°F) | 41 | 45 | 49 | 55 | 61 | 68 | 75 | 76 | 71 | 59 | 46 | 41 | 57 |
| Avg Precip (In.) | 11.55 | 8.4 | 8.97 | 6.94 | 6.41 | 4.03 | 1.28 | 2.41 | 3.76 | 7.57 | 11.32 | 13.54 | 86.19 |