Bristol, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.3 °F (low) to 59.1 °F (high). Annual precipitation averages 38.9 Inches. Bristol 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 | 17.5 °F | 31.8 °F | 2.6 in. |
| February | 19.2 °F | 35.0 °F | 2.09 in. |
| March | 27.5 °F | 46.0 °F | 2.29 in. |
| April | 38.0 °F | 59.0 °F | 3.54 in. |
| May | 49.4 °F | 70.5 °F | 4.27 in. |
| June | 58.9 °F | 79.7 °F | 4.15 in. |
| July | 62.2 °F | 83.2 °F | 3.97 in. |
| August | 60.5 °F | 81.3 °F | 4.1 in. |
| September | 53.1 °F | 75.4 °F | 3.31 in. |
| October | 42.0 °F | 62.4 °F | 3.48 in. |
| November | 32.1 °F | 48.3 °F | 2.79 in. |
| December | 23.5 °F | 36.8 °F | 2.33 in. |
| Annual | 40.3 °F | 59.1 °F | 38.92 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 6a : -10°F to -5°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 |