Platte, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.3 °F (low) to 59.7 °F (high). Annual precipitation averages 24.8 Inches. Platte is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 10.0 °F | 30.6 °F | 0.55 in. |
| February | 13.6 °F | 35.5 °F | 0.69 in. |
| March | 23.4 °F | 47.1 °F | 1.12 in. |
| April | 34.3 °F | 59.0 °F | 2.89 in. |
| May | 46.5 °F | 70.3 °F | 3.48 in. |
| June | 57.4 °F | 80.7 °F | 3.97 in. |
| July | 62.7 °F | 87.4 °F | 2.97 in. |
| August | 60.3 °F | 85.2 °F | 3.07 in. |
| September | 50.9 °F | 77.4 °F | 2.68 in. |
| October | 37.3 °F | 62.3 °F | 1.94 in. |
| November | 24.3 °F | 46.7 °F | 0.84 in. |
| December | 14.3 °F | 33.8 °F | 0.63 in. |
| Annual | 36.3 °F | 59.7 °F | 24.83 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |