Pocahontas, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.9 °F (low) to 64.8 °F (high). Annual precipitation averages 43.7 Inches. Pocahontas is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.6 °F | 37.8 °F | 2.76 in. |
| February | 25.1 °F | 43.0 °F | 2.38 in. |
| March | 33.9 °F | 53.6 °F | 3.31 in. |
| April | 44.3 °F | 65.8 °F | 4.86 in. |
| May | 55.2 °F | 75.3 °F | 5.02 in. |
| June | 64.0 °F | 84.2 °F | 4.67 in. |
| July | 67.3 °F | 87.3 °F | 4.18 in. |
| August | 65.0 °F | 86.3 °F | 3.54 in. |
| September | 56.6 °F | 80.2 °F | 3.29 in. |
| October | 44.9 °F | 68.3 °F | 3.3 in. |
| November | 34.8 °F | 53.8 °F | 3.65 in. |
| December | 26.4 °F | 42.4 °F | 2.76 in. |
| Annual | 44.9 °F | 64.8 °F | 43.72 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 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 |