Roseville, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.7 °F (low) to 56.5 °F (high). Annual precipitation averages 37.4 Inches. Roseville 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 | 8.3 °F | 25.1 °F | 1.0 in. |
| February | 12.3 °F | 29.5 °F | 1.13 in. |
| March | 24.2 °F | 42.4 °F | 1.91 in. |
| April | 35.9 °F | 57.9 °F | 3.89 in. |
| May | 48.2 °F | 69.9 °F | 5.22 in. |
| June | 58.9 °F | 79.4 °F | 6.09 in. |
| July | 62.1 °F | 82.4 °F | 4.46 in. |
| August | 59.5 °F | 80.3 °F | 4.35 in. |
| September | 50.9 °F | 74.4 °F | 3.5 in. |
| October | 38.5 °F | 61.0 °F | 2.75 in. |
| November | 26.3 °F | 44.3 °F | 1.75 in. |
| December | 15.1 °F | 30.8 °F | 1.38 in. |
| Annual | 36.7 °F | 56.5 °F | 37.43 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |