Winslow, Indiana has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.1 °F (low) to 66.1 °F (high). Annual precipitation averages 49.4 Inches. Winslow is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.1 °F | 39.9 °F | 3.55 in. |
| February | 25.7 °F | 44.7 °F | 3.02 in. |
| March | 34.0 °F | 55.0 °F | 4.3 in. |
| April | 44.3 °F | 67.3 °F | 5.18 in. |
| May | 55.0 °F | 76.5 °F | 5.61 in. |
| June | 63.7 °F | 84.6 °F | 4.85 in. |
| July | 66.6 °F | 87.6 °F | 4.42 in. |
| August | 64.6 °F | 86.7 °F | 3.15 in. |
| September | 56.8 °F | 81.2 °F | 3.83 in. |
| October | 45.3 °F | 69.6 °F | 3.54 in. |
| November | 35.1 °F | 55.4 °F | 4.14 in. |
| December | 27.5 °F | 44.4 °F | 3.78 in. |
| Annual | 45.1 °F | 66.1 °F | 49.37 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°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 |