Granger, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.7 °F (low) to 58.8 °F (high). Annual precipitation averages 39.8 Inches. Granger is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.7 °F | 31.6 °F | 2.75 in. |
| February | 19.7 °F | 34.7 °F | 2.31 in. |
| March | 27.8 °F | 45.8 °F | 2.33 in. |
| April | 38.4 °F | 58.6 °F | 3.47 in. |
| May | 49.6 °F | 69.9 °F | 4.15 in. |
| June | 59.1 °F | 79.3 °F | 4.11 in. |
| July | 62.6 °F | 82.9 °F | 4.05 in. |
| August | 61.0 °F | 81.1 °F | 4.12 in. |
| September | 53.7 °F | 75.1 °F | 3.46 in. |
| October | 42.5 °F | 62.3 °F | 3.68 in. |
| November | 32.4 °F | 48.0 °F | 2.88 in. |
| December | 23.6 °F | 36.6 °F | 2.47 in. |
| Annual | 40.7 °F | 58.8 °F | 39.78 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |