Lowell, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.6 °C (low) to 15.5 °C (high). Annual precipitation averages 1022.9 Millimeters. Lowell is located in USDA Plant Hardiness Zone 5b. 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 | -8.7 °C | -0.1 °C | 58.93 mm |
| February | -7.2 °C | 2.2 °C | 50.8 mm |
| March | -2.2 °C | 8.4 °C | 59.69 mm |
| April | 3.6 °C | 15.7 °C | 93.98 mm |
| May | 9.8 °C | 21.7 °C | 109.98 mm |
| June | 15.3 °C | 26.9 °C | 124.97 mm |
| July | 17.3 °C | 28.6 °C | 115.82 mm |
| August | 16.3 °C | 27.8 °C | 109.22 mm |
| September | 11.8 °C | 24.7 °C | 85.09 mm |
| October | 5.4 °C | 17.8 °C | 89.41 mm |
| November | -0.2 °C | 9.6 °C | 69.09 mm |
| December | -5.6 °C | 2.8 °C | 55.88 mm |
| Annual | 4.6 °C | 15.5 °C | 1022.86 mm |
| 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |