Pana, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.5 °F (low) to 64.1 °F (high). Annual precipitation averages 41.4 Inches. 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 | 19.9 °F | 36.2 °F | 2.47 in. |
| February | 23.3 °F | 41.2 °F | 2.1 in. |
| March | 32.1 °F | 52.3 °F | 2.93 in. |
| April | 42.6 °F | 65.4 °F | 4.5 in. |
| May | 53.7 °F | 75.3 °F | 4.77 in. |
| June | 62.5 °F | 83.8 °F | 4.97 in. |
| July | 65.7 °F | 87.0 °F | 3.85 in. |
| August | 63.2 °F | 85.6 °F | 3.02 in. |
| September | 55.6 °F | 80.6 °F | 3.3 in. |
| October | 44.5 °F | 68.1 °F | 3.45 in. |
| November | 33.7 °F | 52.9 °F | 3.48 in. |
| December | 25.3 °F | 41.0 °F | 2.56 in. |
| Annual | 43.5 °F | 64.1 °F | 41.4 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |