Altamonte Springs, Florida has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 16.9 °C (low) to 28 °C (high). Annual precipitation averages 1424.7 Millimeters. Altamonte Springs is located in USDA Plant Hardiness Zone 10a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 9.1 °C | 21.3 °C | 74.93 mm |
| February | 10.6 °C | 22.9 °C | 62.74 mm |
| March | 12.8 °C | 25.4 °C | 88.39 mm |
| April | 15.8 °C | 28.2 °C | 77.22 mm |
| May | 19.2 °C | 30.9 °C | 98.55 mm |
| June | 22.2 °C | 32.4 °C | 209.8 mm |
| July | 23.2 °C | 33.2 °C | 194.56 mm |
| August | 23.4 °C | 33.1 °C | 210.82 mm |
| September | 22.4 °C | 31.8 °C | 184.91 mm |
| October | 18.9 °C | 29.1 °C | 100.08 mm |
| November | 14.2 °C | 25.3 °C | 56.64 mm |
| December | 11.1 °C | 22.6 °C | 66.04 mm |
| Annual | 16.9 °C | 28 °C | 1424.68 mm |
| Average First Frost Date | Frost Rare |
| Average Last Frost Date | |
| Average Days With Frost | Frost Rare |
| Plant Hardiness Zone | Zone 10a : -1.1°C to 1.7°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |