| 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 8a: 10°F to 15°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F | |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F | |
| Average First Frost Date: | Nov. 1 - Nov. 10 | |
| Average Last Frost Date: | Apr. 11 - Apr. 20 | |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate | |
| Ecoregion: | 4a - Western Cascades Lowlands and Valleys | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 97011 - Brightwood, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 31 | 32 | 34 | 37 | 41 | 46 | 51 | 51 | 48 | 41 | 36 | 31 | 40 |
| Avg Max Temp (°F) | 41 | 45 | 50 | 55 | 61 | 68 | 75 | 76 | 71 | 60 | 47 | 41 | 57 |
| Avg Precip (In.) | 11.51 | 8.38 | 8.93 | 6.98 | 6.35 | 3.99 | 1.29 | 2.39 | 3.81 | 7.58 | 11.29 | 13.48 | 85.99 |