| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F |
| 1990 Hardiness Zone: | Zone 9a: 20F to 25F |
| Average First Frost Date: | Dec. 21 - Dec. 31 |
| Average Last Frost Date: | Feb. 21 - Feb. 29 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | 1a - Coastal Lowlands |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 97420 - Coos Bay, OR | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 40 | 41 | 42 | 46 | 50 | 52 | 52 | 49 | 45 | 42 | 39 | 45 |
| Avg Max Temp (°F) | 53 | 55 | 56 | 58 | 62 | 66 | 69 | 70 | 69 | 64 | 57 | 53 | 61 |
| Avg Precip (In.) | 10.01 | 8.33 | 8.09 | 5.15 | 3.45 | 1.78 | .5 | .87 | 1.77 | 4.62 | 10.31 | 10.64 | 65.52 |