Jonesboro, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.3 °F (low) to 60.5 °F (high). Annual precipitation averages 41.7 Inches. Jonesboro is located in USDA Plant Hardiness Zone 6a. 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 | 18.0 °F | 33.1 °F | 2.77 in. |
| February | 20.4 °F | 37.1 °F | 2.29 in. |
| March | 29.0 °F | 48.1 °F | 3.11 in. |
| April | 39.5 °F | 60.9 °F | 4.12 in. |
| May | 50.6 °F | 72.0 °F | 4.44 in. |
| June | 60.4 °F | 80.5 °F | 4.71 in. |
| July | 63.3 °F | 83.4 °F | 4.21 in. |
| August | 61.2 °F | 82.0 °F | 3.78 in. |
| September | 53.6 °F | 76.8 °F | 3.29 in. |
| October | 42.5 °F | 64.2 °F | 3.07 in. |
| November | 32.6 °F | 50.0 °F | 3.27 in. |
| December | 23.9 °F | 38.1 °F | 2.65 in. |
| Annual | 41.3 °F | 60.5 °F | 41.71 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°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 |