| 2023 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F Zone 8a: 10°F to 15°F Zone 5b: -15°F to -10°F |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F Zone 8a: 10°F to 15°F Zone 5a: -20°F to -15°F Zone 5b: -15°F to -10°F |
| 1990 Hardiness Zone: | Zone 7b: 5F to 10F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | May 1 - May 10 |
| 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 97049 - Rhododendron, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 30 | 31 | 33 | 36 | 41 | 45 | 50 | 51 | 48 | 41 | 35 | 30 | 39 |
| Avg Max Temp (°F) | 40 | 44 | 48 | 54 | 60 | 67 | 74 | 75 | 70 | 59 | 45 | 40 | 56 |
| Avg Precip (In.) | 16.01 | 12.46 | 11.66 | 8.54 | 6.65 | 4.28 | 1.64 | 2.87 | 4.21 | 8.59 | 16.63 | 17.87 | 111.4 |