| 2023 Hardiness Zone: | Zone 12a: 50°F to 55°F Zone 11b: 45°F to 50°F |
| 2012 Hardiness Zone: | Zone 11b: 45°F to 50°F |
| 1990 Hardiness Zone: | Zone 10a: 30F to 35F |
| Average First Frost Date: | No Frost |
| Average Last Frost Date: | No Frost |
| Koppen-Geiger Climate Zone: | Aw - Tropical Savanna (Wet and Dry Climate) |
| Ecoregion: | 76d - Southern Coast and Islands |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 33040 - Key West, FL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 65 | 65 | 69 | 72 | 76 | 78 | 79 | 79 | 78 | 76 | 72 | 67 | 73 |
| Avg Max Temp (°F) | 75 | 76 | 79 | 82 | 85 | 88 | 89 | 89 | 88 | 85 | 81 | 77 | 83 |
| Avg Precip (In.) | 2.22 | 1.52 | 1.86 | 2.06 | 3.48 | 4.61 | 3.28 | 5.41 | 5.47 | 4.35 | 2.66 | 2.14 | 39.06 |