| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°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 | |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F | |
| Average First Frost Date: | Nov. 1 - Nov. 10 | |
| Average Last Frost Date: | May 1 - May 10 | |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate | |
| Ecoregion: | 3d - Valley Foothills | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 97360 - Mill City, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 32 | 33 | 35 | 37 | 41 | 46 | 50 | 50 | 46 | 41 | 36 | 32 | 40 |
| Avg Max Temp (°F) | 45 | 48 | 53 | 58 | 63 | 69 | 78 | 78 | 73 | 61 | 50 | 44 | 60 |
| Avg Precip (In.) | 9.73 | 7.63 | 7.19 | 5.01 | 4.19 | 2.96 | .92 | 1.18 | 2.24 | 5.68 | 9.43 | 9.77 | 65.93 |