| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F |
| Average First Frost Date: | Nov. 11 - Nov. 20 |
| Average Last Frost Date: | Mar. 11 - Mar. 20 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | 3b - Willamette River and Tributaries Gallery Forest |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 97002 - Aurora, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 34 | 35 | 37 | 40 | 45 | 50 | 53 | 53 | 49 | 42 | 38 | 34 | 42 |
| Avg Max Temp (°F) | 47 | 51 | 56 | 61 | 67 | 74 | 81 | 81 | 76 | 64 | 53 | 46 | 63 |
| Avg Precip (In.) | 6.01 | 4.98 | 4.27 | 3.03 | 2.48 | 1.69 | .64 | .8 | 1.67 | 3.4 | 6.14 | 6.48 | 41.6 |