Fox Lake, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.5 °F (low) to 57.4 °F (high). Annual precipitation averages 38 Inches. Fox Lake is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.4 °F | 28.8 °F | 1.85 in. |
| February | 16.3 °F | 32.6 °F | 1.87 in. |
| March | 25.7 °F | 43.8 °F | 2.23 in. |
| April | 36.3 °F | 57.0 °F | 3.83 in. |
| May | 47.0 °F | 68.6 °F | 4.51 in. |
| June | 57.2 °F | 78.4 °F | 4.8 in. |
| July | 62.0 °F | 82.6 °F | 3.81 in. |
| August | 60.5 °F | 80.9 °F | 3.82 in. |
| September | 52.8 °F | 74.1 °F | 3.63 in. |
| October | 41.0 °F | 61.1 °F | 3.14 in. |
| November | 30.2 °F | 46.5 °F | 2.4 in. |
| December | 19.8 °F | 34.3 °F | 2.07 in. |
| Annual | 38.5 °F | 57.4 °F | 37.96 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |