Tilden, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 7.7 °C (low) to 18.9 °C (high). Annual precipitation averages 1139.2 Millimeters. Tilden is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5 °C | 4.4 °C | 70.36 mm |
| February | -3.1 °C | 7.3 °C | 64.26 mm |
| March | 1.6 °C | 13 °C | 92.2 mm |
| April | 7.3 °C | 19.4 °C | 125.98 mm |
| May | 13.2 °C | 24.4 °C | 133.6 mm |
| June | 18.1 °C | 29.4 °C | 116.59 mm |
| July | 20.1 °C | 31.2 °C | 109.22 mm |
| August | 18.8 °C | 30.6 °C | 83.06 mm |
| September | 14.2 °C | 27 °C | 82.55 mm |
| October | 7.9 °C | 20.9 °C | 83.06 mm |
| November | 2.1 °C | 12.9 °C | 101.09 mm |
| December | -2.6 °C | 6.7 °C | 77.22 mm |
| Annual | 7.7 °C | 18.9 °C | 1139.19 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°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 |