Denver, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41 °F (low) to 60.5 °F (high). Annual precipitation averages 40.6 Inches. Denver 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 | 17.6 °F | 32.8 °F | 2.65 in. |
| February | 20.1 °F | 36.8 °F | 2.17 in. |
| March | 28.9 °F | 48.0 °F | 2.78 in. |
| April | 39.1 °F | 60.7 °F | 3.66 in. |
| May | 50.5 °F | 71.9 °F | 4.39 in. |
| June | 60.2 °F | 80.9 °F | 4.86 in. |
| July | 63.1 °F | 83.7 °F | 4.31 in. |
| August | 61.3 °F | 82.3 °F | 3.8 in. |
| September | 53.6 °F | 76.8 °F | 3.28 in. |
| October | 42.2 °F | 64.2 °F | 2.93 in. |
| November | 32.3 °F | 49.7 °F | 3.22 in. |
| December | 23.5 °F | 37.7 °F | 2.5 in. |
| Annual | 41 °F | 60.5 °F | 40.55 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 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |