Tightwad, Missouri has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.8 °C (low) to 18.9 °C (high). Annual precipitation averages 1113.3 Millimeters. Tightwad is located in USDA Plant Hardiness Zone 6b. 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 | -6.6 °C | 4.7 °C | 46.74 mm |
| February | -4.4 °C | 7.5 °C | 52.32 mm |
| March | 0.7 °C | 13.4 °C | 75.18 mm |
| April | 6.1 °C | 19.1 °C | 118.62 mm |
| May | 12.2 °C | 23.8 °C | 141.22 mm |
| June | 17.5 °C | 28.8 °C | 128.52 mm |
| July | 19.7 °C | 31.3 °C | 113.79 mm |
| August | 18.6 °C | 30.8 °C | 100.84 mm |
| September | 13.9 °C | 26.6 °C | 111 mm |
| October | 7.1 °C | 20.4 °C | 89.41 mm |
| November | 1.1 °C | 13.1 °C | 78.23 mm |
| December | -3.9 °C | 6.8 °C | 57.4 mm |
| Annual | 6.8 °C | 18.9 °C | 1113.27 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |