Ostrander, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42 °F (low) to 61.2 °F (high). Annual precipitation averages 40.9 Inches. Ostrander 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 | 19.9 °F | 34.8 °F | 2.88 in. |
| February | 21.8 °F | 38.2 °F | 2.28 in. |
| March | 29.8 °F | 48.8 °F | 3.11 in. |
| April | 40.3 °F | 61.7 °F | 3.93 in. |
| May | 51.2 °F | 72.6 °F | 4.29 in. |
| June | 60.5 °F | 80.7 °F | 4.69 in. |
| July | 63.7 °F | 83.5 °F | 4.32 in. |
| August | 61.4 °F | 82.3 °F | 3.52 in. |
| September | 54.1 °F | 77.0 °F | 3.23 in. |
| October | 42.7 °F | 64.5 °F | 2.79 in. |
| November | 32.9 °F | 51.0 °F | 2.95 in. |
| December | 25.4 °F | 39.6 °F | 2.92 in. |
| Annual | 42 °F | 61.2 °F | 40.91 in. |
| 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 : -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 |