Pana, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.4 °C (low) to 17.9 °C (high). Annual precipitation averages 1051.6 Millimeters. Pana is located in USDA Plant Hardiness Zone 6b. 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 | -6.7 °C | 2.3 °C | 62.74 mm |
| February | -4.8 °C | 5.1 °C | 53.34 mm |
| March | 0.1 °C | 11.3 °C | 74.42 mm |
| April | 5.9 °C | 18.6 °C | 114.3 mm |
| May | 12.1 °C | 24.1 °C | 121.16 mm |
| June | 16.9 °C | 28.8 °C | 126.24 mm |
| July | 18.7 °C | 30.6 °C | 97.79 mm |
| August | 17.3 °C | 29.8 °C | 76.71 mm |
| September | 13.1 °C | 27 °C | 83.82 mm |
| October | 6.9 °C | 20.1 °C | 87.63 mm |
| November | 0.9 °C | 11.6 °C | 88.39 mm |
| December | -3.7 °C | 5 °C | 65.02 mm |
| Annual | 6.4 °C | 17.9 °C | 1051.56 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |