| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 8a: 10°F to 15°F |
| 1990 Hardiness Zone: | Zone 8b: 15F to 20F |
| Average First Frost Date: | Nov. 1 - Nov. 10 |
| Average Last Frost Date: | Apr. 21 - Apr. 30 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | 78e - Inland Siskiyous |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 97442 - Glendale, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 34 | 34 | 35 | 36 | 41 | 46 | 53 | 53 | 51 | 44 | 36 | 33 | 41 |
| Avg Max Temp (°F) | 45 | 48 | 51 | 56 | 63 | 70 | 79 | 79 | 74 | 62 | 48 | 43 | 60 |
| Avg Precip (In.) | 6.01 | 4.81 | 4.47 | 2.96 | 1.7 | .92 | .38 | .62 | 1.24 | 2.97 | 6.62 | 6.86 | 39.56 |