Protivin, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 35.1 °F (low) to 55.4 °F (high). Annual precipitation averages 37.4 Inches. 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 | 6.9 °F | 24.2 °F | 1.02 in. |
| February | 10.6 °F | 28.6 °F | 1.09 in. |
| March | 22.7 °F | 41.6 °F | 1.95 in. |
| April | 34.3 °F | 56.6 °F | 3.91 in. |
| May | 46.4 °F | 68.7 °F | 4.65 in. |
| June | 56.9 °F | 78.2 °F | 6.07 in. |
| July | 60.4 °F | 81.5 °F | 4.71 in. |
| August | 57.8 °F | 79.5 °F | 4.27 in. |
| September | 49.4 °F | 73.2 °F | 3.76 in. |
| October | 37.1 °F | 59.8 °F | 2.77 in. |
| November | 25.2 °F | 43.4 °F | 1.79 in. |
| December | 13.8 °F | 29.9 °F | 1.43 in. |
| Annual | 35.1 °F | 55.4 °F | 37.42 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |