Park City, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5 °C (low) to 13.9 °C (high). Annual precipitation averages 939.3 Millimeters. Park City is located in USDA Plant Hardiness Zone 6a. 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 | -8.7 °C | -0.8 °C | 54.36 mm |
| February | -7.2 °C | 1.1 °C | 52.58 mm |
| March | -2.3 °C | 6.5 °C | 56.13 mm |
| April | 3.4 °C | 12.7 °C | 93.47 mm |
| May | 9.2 °C | 19 °C | 110.49 mm |
| June | 14.7 °C | 24.6 °C | 106.93 mm |
| July | 18 °C | 27.4 °C | 87.88 mm |
| August | 17.6 °C | 26.7 °C | 90.93 mm |
| September | 13.2 °C | 23 °C | 89.15 mm |
| October | 6.7 °C | 16.2 °C | 79.5 mm |
| November | 0.3 °C | 8.6 °C | 63.25 mm |
| December | -5.3 °C | 2.2 °C | 54.61 mm |
| Annual | 5 °C | 13.9 °C | 939.28 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 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |