Cedar Grove, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.2 °C (low) to 18.1 °C (high). Annual precipitation averages 1129.3 Millimeters. Cedar Grove is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.6 °C | 3.8 °C | 84.58 mm |
| February | -4.6 °C | 6 °C | 69.34 mm |
| March | -0.2 °C | 11.7 °C | 95 mm |
| April | 5.4 °C | 18.7 °C | 118.36 mm |
| May | 11.4 °C | 23.8 °C | 124.46 mm |
| June | 16.2 °C | 28.4 °C | 118.11 mm |
| July | 18.1 °C | 30.2 °C | 103.63 mm |
| August | 17.2 °C | 29.9 °C | 80.01 mm |
| September | 12.8 °C | 26.7 °C | 76.71 mm |
| October | 6.2 °C | 19.8 °C | 83.82 mm |
| November | 0.8 °C | 12.4 °C | 85.34 mm |
| December | -2.8 °C | 6.2 °C | 89.92 mm |
| Annual | 6.2 °C | 18.1 °C | 1129.28 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |