Rockfield, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.4 °C (low) to 16.2 °C (high). Annual precipitation averages 1030.5 Millimeters. Rockfield is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.7 °C | 0.8 °C | 65.79 mm |
| February | -6.2 °C | 3 °C | 53.85 mm |
| March | -1.2 °C | 9.4 °C | 72.14 mm |
| April | 4.6 °C | 16.7 °C | 98.55 mm |
| May | 10.8 °C | 22.7 °C | 110.24 mm |
| June | 15.9 °C | 27.4 °C | 122.43 mm |
| July | 17.5 °C | 28.9 °C | 118.62 mm |
| August | 16.4 °C | 28.1 °C | 94.49 mm |
| September | 12.2 °C | 25.3 °C | 78.49 mm |
| October | 6 °C | 18.3 °C | 77.22 mm |
| November | 0.5 °C | 10.2 °C | 77.98 mm |
| December | -4.4 °C | 3.5 °C | 60.71 mm |
| Annual | 5.4 °C | 16.2 °C | 1030.51 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°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 |