Swedesburg, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41 °F (low) to 60.9 °F (high). Annual precipitation averages 38 Inches. Swedesburg is located in USDA Plant Hardiness Zone 5b. 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 | 15.0 °F | 31.5 °F | 1.41 in. |
| February | 18.6 °F | 36.1 °F | 1.69 in. |
| March | 28.9 °F | 49.0 °F | 2.4 in. |
| April | 39.9 °F | 62.3 °F | 3.72 in. |
| May | 51.9 °F | 72.8 °F | 5.13 in. |
| June | 61.8 °F | 82.0 °F | 4.97 in. |
| July | 65.2 °F | 85.3 °F | 4.12 in. |
| August | 62.8 °F | 83.8 °F | 4.04 in. |
| September | 53.9 °F | 77.5 °F | 3.57 in. |
| October | 42.3 °F | 64.7 °F | 2.91 in. |
| November | 30.9 °F | 49.4 °F | 2.26 in. |
| December | 20.8 °F | 36.7 °F | 1.76 in. |
| Annual | 41 °F | 60.9 °F | 37.98 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°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 |