Bridgewater, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 35.3 °F (low) to 57 °F (high). Annual precipitation averages 27.6 Inches. Bridgewater 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 | 7.2 °F | 26.0 °F | 0.46 in. |
| February | 11.4 °F | 31.3 °F | 0.72 in. |
| March | 22.2 °F | 43.0 °F | 1.26 in. |
| April | 34.1 °F | 57.1 °F | 3.03 in. |
| May | 46.8 °F | 69.6 °F | 4.08 in. |
| June | 58.1 °F | 79.9 °F | 3.86 in. |
| July | 62.1 °F | 84.5 °F | 3.42 in. |
| August | 59.6 °F | 82.0 °F | 3.57 in. |
| September | 50.5 °F | 75.1 °F | 3.2 in. |
| October | 36.7 °F | 60.5 °F | 2.36 in. |
| November | 23.1 °F | 44.0 °F | 0.93 in. |
| December | 12.2 °F | 30.4 °F | 0.71 in. |
| Annual | 35.3 °F | 57 °F | 27.6 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 4b : -25°F to -20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |