Jackson Junction, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 35.5 °F (low) to 55.6 °F (high). Annual precipitation averages 37.5 Inches. Jackson Junction is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 7.4 °F | 24.6 °F | 1.03 in. |
| February | 11.1 °F | 28.8 °F | 1.09 in. |
| March | 23.1 °F | 42.0 °F | 2.04 in. |
| April | 34.7 °F | 56.8 °F | 3.98 in. |
| May | 46.7 °F | 68.8 °F | 4.56 in. |
| June | 57.5 °F | 78.3 °F | 5.92 in. |
| July | 60.7 °F | 81.4 °F | 4.88 in. |
| August | 58.2 °F | 79.4 °F | 4.18 in. |
| September | 49.8 °F | 73.3 °F | 3.78 in. |
| October | 37.5 °F | 60.0 °F | 2.81 in. |
| November | 25.5 °F | 43.6 °F | 1.81 in. |
| December | 14.3 °F | 30.3 °F | 1.44 in. |
| Annual | 35.5 °F | 55.6 °F | 37.52 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |