Peru, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.8 °F (low) to 60.6 °F (high). Annual precipitation averages 40.4 Inches. Peru 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 | 33.0 °F | 2.63 in. |
| February | 20.1 °F | 36.9 °F | 2.14 in. |
| March | 28.9 °F | 48.3 °F | 2.88 in. |
| April | 38.9 °F | 60.9 °F | 3.77 in. |
| May | 49.9 °F | 72.2 °F | 4.26 in. |
| June | 59.6 °F | 81.2 °F | 5.04 in. |
| July | 62.9 °F | 84.0 °F | 4.18 in. |
| August | 61.3 °F | 82.5 °F | 3.85 in. |
| September | 53.5 °F | 76.9 °F | 3.14 in. |
| October | 41.8 °F | 64.2 °F | 2.89 in. |
| November | 32.1 °F | 49.7 °F | 3.16 in. |
| December | 23.4 °F | 37.8 °F | 2.45 in. |
| Annual | 40.8 °F | 60.6 °F | 40.39 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 |