Java, South Dakota has a Humid Continental Hot Summers With Dry Winters climate (Köppen classification: Dwa). Average annual temperatures range from -0.1 °C (low) to 12 °C (high). Annual precipitation averages 497.8 Millimeters. Java is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -15.7 °C | -5.6 °C | 11.18 mm |
| February | -13.4 °C | -3.1 °C | 15.24 mm |
| March | -7.7 °C | 3.8 °C | 20.83 mm |
| April | -1 °C | 12.1 °C | 41.91 mm |
| May | 6 °C | 19.2 °C | 73.91 mm |
| June | 12.1 °C | 24.8 °C | 87.88 mm |
| July | 14.8 °C | 28.1 °C | 74.68 mm |
| August | 13.7 °C | 27.6 °C | 56.64 mm |
| September | 8.3 °C | 22.4 °C | 43.69 mm |
| October | 0.9 °C | 13.5 °C | 44.45 mm |
| November | -6.4 °C | 4.6 °C | 14.22 mm |
| December | -12.6 °C | -2.9 °C | 13.21 mm |
| Annual | -0.1 °C | 12 °C | 497.84 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4a : -34.4°C to -31.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dwa - Humid Continental Hot Summers With Dry Winters |