Varna, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.2 °F (low) to 60.5 °F (high). Annual precipitation averages 37.2 Inches. Varna 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 | 14.9 °F | 31.3 °F | 1.92 in. |
| February | 18.4 °F | 35.9 °F | 1.8 in. |
| March | 28.1 °F | 48.2 °F | 2.55 in. |
| April | 38.6 °F | 61.6 °F | 3.66 in. |
| May | 50.6 °F | 72.4 °F | 4.57 in. |
| June | 60.3 °F | 81.4 °F | 4.11 in. |
| July | 63.8 °F | 84.4 °F | 3.86 in. |
| August | 61.5 °F | 82.8 °F | 3.81 in. |
| September | 53.3 °F | 77.5 °F | 3.42 in. |
| October | 41.7 °F | 64.7 °F | 2.87 in. |
| November | 30.6 °F | 49.4 °F | 2.67 in. |
| December | 20.8 °F | 36.5 °F | 1.94 in. |
| Annual | 40.2 °F | 60.5 °F | 37.18 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |