Rockaway Beach, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.1 °C (low) to 20.7 °C (high). Annual precipitation averages 1174.8 Millimeters. Rockaway Beach is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.6 °C | 7.8 °C | 70.87 mm |
| February | -2.8 °C | 10.4 °C | 65.02 mm |
| March | 1.4 °C | 15.6 °C | 106.93 mm |
| April | 6.3 °C | 21.1 °C | 133.1 mm |
| May | 11.8 °C | 25.4 °C | 133.35 mm |
| June | 16.8 °C | 30 °C | 108.71 mm |
| July | 18.8 °C | 32.3 °C | 102.11 mm |
| August | 18.1 °C | 31.9 °C | 77.72 mm |
| September | 13.8 °C | 27.9 °C | 114.3 mm |
| October | 7.2 °C | 21.7 °C | 95.25 mm |
| November | 1.7 °C | 15.1 °C | 99.57 mm |
| December | -2.8 °C | 9.4 °C | 67.82 mm |
| Annual | 7.1 °C | 20.7 °C | 1174.75 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |