Gibraltar, Michigan has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.6 °C (low) to 14.8 °C (high). Annual precipitation averages 911.4 Millimeters. Gibraltar is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7 °C | 0.2 °C | 64.01 mm |
| February | -6.3 °C | 1.7 °C | 56.64 mm |
| March | -2.3 °C | 7 °C | 68.07 mm |
| April | 3.7 °C | 14 °C | 84.33 mm |
| May | 10.1 °C | 20.6 °C | 97.54 mm |
| June | 15.8 °C | 26.1 °C | 80.77 mm |
| July | 18.2 °C | 28.3 °C | 84.58 mm |
| August | 17.4 °C | 27.4 °C | 88.14 mm |
| September | 13.3 °C | 23.8 °C | 83.57 mm |
| October | 6.9 °C | 16.6 °C | 70.61 mm |
| November | 1.1 °C | 9.1 °C | 69.85 mm |
| December | -3.5 °C | 3.1 °C | 63.25 mm |
| Annual | 5.6 °C | 14.8 °C | 911.36 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |