Olivet, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.6 °C (low) to 15.2 °C (high). Annual precipitation averages 642.6 Millimeters. Olivet is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.8 °C | -2.1 °C | 13.97 mm |
| February | -10.5 °C | 0.9 °C | 17.78 mm |
| March | -4.6 °C | 7.6 °C | 32 mm |
| April | 1.9 °C | 15.5 °C | 71.88 mm |
| May | 8.7 °C | 22.1 °C | 91.69 mm |
| June | 14.9 °C | 27.9 °C | 92.96 mm |
| July | 17.3 °C | 30.2 °C | 75.18 mm |
| August | 15.9 °C | 28.8 °C | 74.42 mm |
| September | 10.9 °C | 25.2 °C | 72.64 mm |
| October | 3.4 °C | 17.5 °C | 55.12 mm |
| November | -4.1 °C | 7.9 °C | 25.15 mm |
| December | -10.1 °C | 0.4 °C | 19.81 mm |
| Annual | 2.6 °C | 15.2 °C | 642.6 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |