Glandorf, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41 °F (low) to 60.3 °F (high). Annual precipitation averages 37.1 Inches. Glandorf is located in USDA Plant Hardiness Zone 6a. 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 | 18.2 °F | 33.0 °F | 2.43 in. |
| February | 20.0 °F | 36.1 °F | 2.02 in. |
| March | 28.1 °F | 46.7 °F | 2.44 in. |
| April | 38.3 °F | 60.4 °F | 3.5 in. |
| May | 50.0 °F | 71.7 °F | 4.28 in. |
| June | 59.9 °F | 80.8 °F | 4.1 in. |
| July | 63.0 °F | 84.2 °F | 4.2 in. |
| August | 60.9 °F | 82.3 °F | 3.54 in. |
| September | 53.6 °F | 76.8 °F | 2.79 in. |
| October | 42.7 °F | 64.0 °F | 2.75 in. |
| November | 32.6 °F | 49.6 °F | 2.74 in. |
| December | 24.1 °F | 37.9 °F | 2.33 in. |
| Annual | 41 °F | 60.3 °F | 37.12 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 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 |