| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F |
| 1990 Hardiness Zone: | Zone 8b: 15F to 20F |
| Average First Frost Date: | Dec. 11 - Dec. 20 |
| Average Last Frost Date: | Feb. 21 - Feb. 29 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 75f - Sea Island Flatwoods |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 32040 - Glen Saint Mary, FL | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 40 | 42 | 47 | 53 | 61 | 68 | 71 | 70 | 67 | 57 | 49 | 42 | 55 |
| Avg Max Temp (°F) | 66 | 69 | 75 | 80 | 86 | 90 | 92 | 91 | 88 | 81 | 74 | 67 | 80 |
| Avg Precip (In.) | 4.36 | 3.44 | 4.54 | 3.21 | 3.56 | 6.52 | 6.44 | 7.37 | 5.42 | 2.99 | 2.29 | 2.94 | 53.08 |