Gilbertville, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.1 °C (low) to 14.4 °C (high). Annual precipitation averages 968.7 Millimeters. Gilbertville 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 | -12.3 °C | -2.9 °C | 28.45 mm |
| February | -10.2 °C | -0.5 °C | 30.73 mm |
| March | -3.7 °C | 6.9 °C | 52.83 mm |
| April | 2.6 °C | 15.1 °C | 100.58 mm |
| May | 9.4 °C | 21.6 °C | 122.68 mm |
| June | 15.3 °C | 26.9 °C | 145.8 mm |
| July | 17.1 °C | 28.6 °C | 120.14 mm |
| August | 15.6 °C | 27.6 °C | 108.71 mm |
| September | 10.7 °C | 24.2 °C | 93.98 mm |
| October | 4.1 °C | 16.8 °C | 73.91 mm |
| November | -2.7 °C | 7.7 °C | 51.56 mm |
| December | -8.7 °C | 0.3 °C | 39.37 mm |
| Annual | 3.1 °C | 14.4 °C | 968.74 mm |
| 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 : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |