Vermillion (SD) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Vermillion.
Climate overview of Vermillion
Temperatures in Vermillion, South Dakota, United States of America, vary greatly throughout the year. July is the hottest month at 31°C (88°F), while January is the coldest at 0°C (32°F).
Vermillion sees a moderate amount of rain/snowfall, totalling around 700 mm (28 in) per year. It experiences a distinct dry season from November to March, with very warm summers and very cold winters, creating some seasonal variation.
Vermillion Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Vermillion - and find the best time to visit.
Monthly Temperature in Vermillion
The climate in Vermillion is known for significant temperature differences throughout the year, making the weather dynamic. Average maximum daytime temperatures range from a very warm 31°C (88°F) in July, the warmest time of the year, to a very cold 0°C (32°F) during cooler months like January.
At night, you can expect temperatures ranging from 18°C (64°F) in July to around -12°C (10°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Vermillion
Generally, Vermillion receives mid-range precipitation levels, with 700 mm (28 in) annually. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, June it receives high rainfall, averaging 107 mm (4.2 in) of precipitation, recorded across 12 rainy days. In contrast, the driest month January brings less snowfall, with 14 mm (0.6 in) over 5 snowy days. For more details, please visit our Vermillion Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Vermillion
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, August and September
- Warmest weather: July and August
- Fewest rainy days: January, February, March and November
- Seasonal pattern: A distinct dry season from November to March, with very warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -12°C (10°F).
Frequently asked questions about the climate in Vermillion
What is the best time to visit Vermillion?
May, August and September typically offer the most optimal weather in Vermillion. In contrast, January, February and December tend to have less optimal conditions. Vermillion has a distinct dry season from November to March, with very warm summers and very cold winters.
What temperatures can I expect in Vermillion?
Daytime highs range from 0°C (32°F) in January to 31°C (88°F) in July. Nighttime lows range from -12°C (10°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Vermillion get?
Annual rainfall is around 700 mm (28 in). June is the wettest month with 107 mm (4.2 in), while January is the driest with 14 mm (0.6 in).
Vermillion 3-Day Forecast
Vermillion (SD) 3-Day Forecast
Vermillion on the map
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