Creston, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.2 °F (low) to 58.1 °F (high). Annual precipitation averages 37.2 Inches. Creston 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 | 12.6 °F | 28.5 °F | 1.68 in. |
| February | 16.1 °F | 32.8 °F | 1.69 in. |
| March | 26.1 °F | 45.2 °F | 2.21 in. |
| April | 36.5 °F | 58.9 °F | 3.55 in. |
| May | 48.4 °F | 70.4 °F | 4.72 in. |
| June | 58.3 °F | 79.7 °F | 4.96 in. |
| July | 61.8 °F | 82.7 °F | 3.95 in. |
| August | 59.5 °F | 80.8 °F | 3.93 in. |
| September | 51.2 °F | 75.1 °F | 3.43 in. |
| October | 39.6 °F | 62.3 °F | 2.85 in. |
| November | 29.1 °F | 46.9 °F | 2.31 in. |
| December | 18.8 °F | 34.0 °F | 1.91 in. |
| Annual | 38.2 °F | 58.1 °F | 37.19 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 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |