Varina, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.7 °C (low) to 14 °C (high). Annual precipitation averages 833.6 Millimeters. Varina 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 | -13.1 °C | -3.3 °C | 20.32 mm |
| February | -10.8 °C | -0.9 °C | 24.64 mm |
| March | -4.1 °C | 6.7 °C | 46.74 mm |
| April | 2.1 °C | 14.7 °C | 90.42 mm |
| May | 9.1 °C | 21.2 °C | 115.32 mm |
| June | 15.2 °C | 26.8 °C | 130.56 mm |
| July | 17.1 °C | 28.4 °C | 91.44 mm |
| August | 15.6 °C | 27 °C | 111.51 mm |
| September | 10.6 °C | 23.9 °C | 76.45 mm |
| October | 3.7 °C | 16.6 °C | 59.69 mm |
| November | -3.5 °C | 7.3 °C | 37.85 mm |
| December | -9.6 °C | -0.4 °C | 28.7 mm |
| Annual | 2.7 °C | 14 °C | 833.64 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |