| 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 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 97111 - Carlton, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 33 | 35 | 37 | 39 | 44 | 48 | 51 | 51 | 48 | 42 | 38 | 34 | 42 |
| Avg Max Temp (°F) | 46 | 51 | 56 | 61 | 68 | 74 | 81 | 82 | 77 | 64 | 52 | 46 | 63 |
| Avg Precip (In.) | 6.62 | 5.55 | 4.67 | 2.93 | 2.08 | 1.26 | .5 | .65 | 1.51 | 3.07 | 6.44 | 7.55 | 42.82 |