Floyd, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.4 °C (low) to 13.4 °C (high). Annual precipitation averages 957.3 Millimeters. Floyd 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 | -13.4 °C | -4.1 °C | 25.4 mm |
| February | -11.2 °C | -1.7 °C | 28.96 mm |
| March | -4.6 °C | 5.4 °C | 49.53 mm |
| April | 2.1 °C | 14.2 °C | 97.28 mm |
| May | 8.8 °C | 20.9 °C | 129.54 mm |
| June | 14.7 °C | 26.2 °C | 157.73 mm |
| July | 16.6 °C | 27.8 °C | 120.14 mm |
| August | 15.1 °C | 26.7 °C | 106.93 mm |
| September | 10.4 °C | 23.4 °C | 93.47 mm |
| October | 3.5 °C | 15.9 °C | 69.09 mm |
| November | -3.3 °C | 6.6 °C | 44.45 mm |
| December | -9.6 °C | -0.9 °C | 34.8 mm |
| Annual | 2.4 °C | 13.4 °C | 957.32 mm |
| 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 : -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 |