East Dubuque, Illinois has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.7 °F (low) to 57.9 °F (high). Annual precipitation averages 38.3 Inches. East Dubuque is located in USDA Plant Hardiness Zone 5a. 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 | 11.3 °F | 27.6 °F | 1.29 in. |
| February | 14.3 °F | 32.1 °F | 1.49 in. |
| March | 26.2 °F | 45.0 °F | 2.08 in. |
| April | 37.7 °F | 58.7 °F | 3.83 in. |
| May | 49.2 °F | 70.8 °F | 4.49 in. |
| June | 59.7 °F | 80.4 °F | 5.68 in. |
| July | 63.5 °F | 83.6 °F | 4.95 in. |
| August | 61.5 °F | 81.7 °F | 3.93 in. |
| September | 53.1 °F | 74.8 °F | 3.71 in. |
| October | 41.2 °F | 61.5 °F | 2.87 in. |
| November | 29.2 °F | 45.8 °F | 2.25 in. |
| December | 17.9 °F | 33.1 °F | 1.71 in. |
| Annual | 38.7 °F | 57.9 °F | 38.28 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |