Truesdale, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.8 °F (low) to 57.2 °F (high). Annual precipitation averages 32.4 Inches. Truesdale is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 8.5 °F | 26.3 °F | 0.74 in. |
| February | 12.5 °F | 30.6 °F | 0.92 in. |
| March | 24.7 °F | 44.3 °F | 1.76 in. |
| April | 35.6 °F | 58.4 °F | 3.62 in. |
| May | 48.3 °F | 70.2 °F | 4.47 in. |
| June | 59.3 °F | 80.2 °F | 5.23 in. |
| July | 62.6 °F | 82.9 °F | 3.38 in. |
| August | 59.9 °F | 80.5 °F | 4.46 in. |
| September | 51.2 °F | 75.1 °F | 2.98 in. |
| October | 38.4 °F | 61.6 °F | 2.33 in. |
| November | 25.5 °F | 45.3 °F | 1.46 in. |
| December | 14.6 °F | 31.5 °F | 1.04 in. |
| Annual | 36.8 °F | 57.2 °F | 32.39 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |