West Lafayette, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.2 °F (low) to 62.1 °F (high). Annual precipitation averages 40.1 Inches. West Lafayette 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 | 18.2 °F | 34.2 °F | 2.59 in. |
| February | 21.3 °F | 38.3 °F | 2.12 in. |
| March | 30.4 °F | 49.9 °F | 2.85 in. |
| April | 41.1 °F | 63.0 °F | 3.91 in. |
| May | 52.1 °F | 73.9 °F | 4.38 in. |
| June | 61.0 °F | 82.4 °F | 4.73 in. |
| July | 64.3 °F | 84.8 °F | 4.32 in. |
| August | 61.8 °F | 83.5 °F | 3.36 in. |
| September | 54.6 °F | 78.7 °F | 3.03 in. |
| October | 43.5 °F | 66.2 °F | 3.01 in. |
| November | 33.2 °F | 51.2 °F | 3.18 in. |
| December | 24.3 °F | 39.2 °F | 2.58 in. |
| Annual | 42.2 °F | 62.1 °F | 40.06 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |