Rose Hill, Iowa has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40 °F (low) to 60.2 °F (high). Annual precipitation averages 37.6 Inches. Rose Hill is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.4 °F | 30.5 °F | 1.17 in. |
| February | 17.1 °F | 35.2 °F | 1.5 in. |
| March | 27.9 °F | 48.2 °F | 2.16 in. |
| April | 38.9 °F | 61.6 °F | 3.81 in. |
| May | 51.1 °F | 71.9 °F | 5.04 in. |
| June | 61.5 °F | 81.6 °F | 5.27 in. |
| July | 64.6 °F | 85.2 °F | 4.24 in. |
| August | 62.2 °F | 83.1 °F | 4.27 in. |
| September | 53.3 °F | 76.7 °F | 3.66 in. |
| October | 41.4 °F | 64.4 °F | 2.76 in. |
| November | 29.6 °F | 48.5 °F | 2.18 in. |
| December | 19.4 °F | 35.8 °F | 1.52 in. |
| Annual | 40 °F | 60.2 °F | 37.58 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |