Gulf Stream, Florida has a Tropical Rainforest climate (Köppen classification: Af). Average annual temperatures range from 20.9 °C (low) to 27.6 °C (high). Annual precipitation averages 1535.7 Millimeters. Gulf Stream is located in USDA Plant Hardiness Zone 11a.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.3 °C | 23.4 °C | 78.49 mm |
| February | 16.3 °C | 24.4 °C | 71.88 mm |
| March | 17.8 °C | 25.4 °C | 79.5 mm |
| April | 20.3 °C | 26.7 °C | 78.74 mm |
| May | 22.4 °C | 28.4 °C | 109.47 mm |
| June | 24.2 °C | 30.1 °C | 224.03 mm |
| July | 24.9 °C | 31.1 °C | 142.75 mm |
| August | 25.3 °C | 31.2 °C | 198.63 mm |
| September | 24.8 °C | 30.3 °C | 215.14 mm |
| October | 23 °C | 28.8 °C | 162.56 mm |
| November | 19.6 °C | 26.6 °C | 103.38 mm |
| December | 17.2 °C | 24.7 °C | 71.12 mm |
| Annual | 20.9 °C | 27.6 °C | 1535.69 mm |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 11a : 4.4°C to 7.2°C |
| Plant Hardiness Zone - 2012 | Zone 10b : 1.7°C to 4.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Af - Tropical Rainforest |