Protivin, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.7 °C (low) to 13 °C (high). Annual precipitation averages 950.5 Millimeters. Protivin is located in USDA Plant Hardiness Zone 4b. 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 | -13.9 °C | -4.3 °C | 25.91 mm |
| February | -11.9 °C | -1.9 °C | 27.69 mm |
| March | -5.2 °C | 5.3 °C | 49.53 mm |
| April | 1.3 °C | 13.7 °C | 99.31 mm |
| May | 8 °C | 20.4 °C | 118.11 mm |
| June | 13.8 °C | 25.7 °C | 154.18 mm |
| July | 15.8 °C | 27.5 °C | 119.63 mm |
| August | 14.3 °C | 26.4 °C | 108.46 mm |
| September | 9.7 °C | 22.9 °C | 95.5 mm |
| October | 2.8 °C | 15.4 °C | 70.36 mm |
| November | -3.8 °C | 6.3 °C | 45.47 mm |
| December | -10.1 °C | -1.2 °C | 36.32 mm |
| Annual | 1.7 °C | 13 °C | 950.47 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 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |