Olivet, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36.6 °F (low) to 59.3 °F (high). Annual precipitation averages 25.3 Inches. 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 | 9.0 °F | 28.3 °F | 0.55 in. |
| February | 13.1 °F | 33.7 °F | 0.7 in. |
| March | 23.7 °F | 45.7 °F | 1.26 in. |
| April | 35.4 °F | 59.9 °F | 2.83 in. |
| May | 47.6 °F | 71.8 °F | 3.61 in. |
| June | 58.9 °F | 82.2 °F | 3.66 in. |
| July | 63.1 °F | 86.3 °F | 2.96 in. |
| August | 60.7 °F | 83.8 °F | 2.93 in. |
| September | 51.6 °F | 77.3 °F | 2.86 in. |
| October | 38.1 °F | 63.5 °F | 2.17 in. |
| November | 24.6 °F | 46.2 °F | 0.99 in. |
| December | 13.8 °F | 32.7 °F | 0.78 in. |
| Annual | 36.6 °F | 59.3 °F | 25.3 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |