| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F | |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F | |
| 1990 Hardiness Zone: | Zone 8b: 15F to 20F | |
| Average First Frost Date: | Nov. 11 - Nov. 20 | |
| Average Last Frost Date: | Apr. 1 - Apr. 10 | |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate | |
| Ecoregion: | 3c - Prairie Terraces | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 97119 - Gaston, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 33 | 35 | 37 | 40 | 44 | 49 | 53 | 53 | 50 | 43 | 38 | 34 | 42 |
| Avg Max Temp (°F) | 45 | 50 | 55 | 60 | 67 | 73 | 80 | 81 | 76 | 64 | 52 | 46 | 62 |
| Avg Precip (In.) | 6.28 | 5.4 | 4.49 | 2.89 | 1.94 | 1.33 | .52 | .81 | 1.67 | 2.94 | 6.51 | 7.91 | 42.69 |