Emden, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42 °F (low) to 62.7 °F (high). Annual precipitation averages 38.7 Inches. Emden is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.3 °F | 34.0 °F | 2.17 in. |
| February | 20.7 °F | 38.8 °F | 1.93 in. |
| March | 30.2 °F | 50.8 °F | 2.59 in. |
| April | 40.9 °F | 64.0 °F | 3.82 in. |
| May | 52.5 °F | 74.4 °F | 4.53 in. |
| June | 62.0 °F | 83.1 °F | 4.46 in. |
| July | 64.9 °F | 85.9 °F | 4.11 in. |
| August | 62.7 °F | 84.4 °F | 3.54 in. |
| September | 54.5 °F | 79.4 °F | 3.3 in. |
| October | 42.8 °F | 66.7 °F | 3.15 in. |
| November | 32.0 °F | 51.5 °F | 2.81 in. |
| December | 22.9 °F | 39.2 °F | 2.24 in. |
| Annual | 42 °F | 62.7 °F | 38.65 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |