Roselawn, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.3 °F (low) to 60.2 °F (high). Annual precipitation averages 40.5 Inches. Roselawn 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 | 16.3 °F | 32.0 °F | 2.43 in. |
| February | 19.1 °F | 36.3 °F | 2.13 in. |
| March | 28.3 °F | 47.6 °F | 2.58 in. |
| April | 38.5 °F | 60.6 °F | 3.71 in. |
| May | 49.9 °F | 71.6 °F | 4.32 in. |
| June | 59.6 °F | 80.8 °F | 4.87 in. |
| July | 62.9 °F | 83.6 °F | 4.78 in. |
| August | 61.0 °F | 82.1 °F | 3.96 in. |
| September | 53.0 °F | 76.8 °F | 3.28 in. |
| October | 41.7 °F | 64.3 °F | 3.45 in. |
| November | 31.5 °F | 49.4 °F | 2.7 in. |
| December | 22.0 °F | 37.2 °F | 2.26 in. |
| Annual | 40.3 °F | 60.2 °F | 40.47 in. |
| 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 : -15°F to -10°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 |