Arcola, Missouri has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.6 °C (low) to 19.6 °C (high). Annual precipitation averages 1160.8 Millimeters. Arcola is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.2 °C | 5.9 °C | 51.31 mm |
| February | -3.2 °C | 8.7 °C | 54.36 mm |
| March | 1.7 °C | 14.1 °C | 83.06 mm |
| April | 6.9 °C | 19.6 °C | 124.21 mm |
| May | 12.7 °C | 24.2 °C | 155.19 mm |
| June | 17.8 °C | 29.1 °C | 127.25 mm |
| July | 20.1 °C | 31.7 °C | 109.73 mm |
| August | 19.1 °C | 31.5 °C | 92.2 mm |
| September | 14.4 °C | 27.3 °C | 113.79 mm |
| October | 7.8 °C | 20.9 °C | 94.74 mm |
| November | 1.9 °C | 13.8 °C | 87.38 mm |
| December | -2.9 °C | 7.9 °C | 67.56 mm |
| Annual | 7.6 °C | 19.6 °C | 1160.78 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 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 |