| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F |
| 2012 Hardiness Zone: | Zone 9a: 20°F to 25°F |
| 1990 Hardiness Zone: | Zone 8b: 15F to 20F |
| Average First Frost Date: | Dec. 1 - Dec. 10 |
| Average Last Frost Date: | Mar. 1 - Mar. 10 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 75a - Gulf Coast Flatwoods |
| Heat Zone Days: | 121 - 150 days Over 86°F |
Annual Climate Data for ZIP Code 70458 - Slidell, LA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 40 | 43 | 50 | 56 | 64 | 70 | 73 | 72 | 68 | 57 | 49 | 42 | 57 |
| Avg Max Temp (°F) | 61 | 65 | 71 | 77 | 84 | 89 | 91 | 91 | 88 | 80 | 71 | 64 | 78 |
| Avg Precip (In.) | 6.3 | 5.06 | 5.96 | 4.8 | 5.64 | 4.42 | 6.44 | 5.71 | 5.21 | 3.11 | 5.06 | 4.72 | 62.42 |