| 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 8a: 10°F to 15°F Zone 7b: 5°F to 10°F |
| 1990 Hardiness Zone: | Zone 8a: 10F to 15F |
| Average First Frost Date: | Oct. 11 - Oct. 20 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | 1d - Volcanics |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 97016 - Clatskanie, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 32 | 33 | 35 | 38 | 43 | 47 | 51 | 51 | 46 | 40 | 36 | 32 | 40 |
| Avg Max Temp (°F) | 45 | 49 | 54 | 58 | 64 | 69 | 74 | 75 | 71 | 61 | 50 | 45 | 60 |
| Avg Precip (In.) | 9.51 | 7.66 | 6.66 | 4.23 | 2.71 | 1.91 | .83 | .98 | 2.13 | 4.47 | 9.28 | 10.27 | 60.66 |