Odessa, Delaware has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 46.1 °F (low) to 64.6 °F (high). Annual precipitation averages 44.7 Inches. Odessa is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.1 °F | 41.8 °F | 3.1 in. |
| February | 26.2 °F | 44.1 °F | 2.7 in. |
| March | 33.3 °F | 52.1 °F | 4.02 in. |
| April | 43.6 °F | 63.9 °F | 3.55 in. |
| May | 53.3 °F | 73.1 °F | 3.75 in. |
| June | 62.7 °F | 81.7 °F | 4.55 in. |
| July | 67.9 °F | 86.1 °F | 4.24 in. |
| August | 66.3 °F | 84.3 °F | 3.88 in. |
| September | 59.6 °F | 78.4 °F | 4.19 in. |
| October | 47.6 °F | 67.0 °F | 3.87 in. |
| November | 37.0 °F | 56.1 °F | 3.02 in. |
| December | 30.0 °F | 46.2 °F | 3.86 in. |
| Annual | 46.1 °F | 64.6 °F | 44.73 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |