Climate almanac
Vermillion
South Dakota, United States · 42.78°, -96.93°
What is the climate like in Vermillion?
The best time to visit Vermillion is typically June – October, with trip comfort peaking in September (7.7/10). Vermillion is warmest in July, when daily highs average 86°F (30°C), and coolest in January, when lows fall to about 15°F (-9°C). The wettest month is typically May and the driest is February; the year sees roughly 32 in (809 mm) of precipitation.
- Best time to visitJune – October — comfort peaks in September (7.7/10)
- Warmest monthJuly — average high 86°F (30°C)
- Coolest monthJanuary — average low 15°F (-9°C)
- Wettest monthMay (5.3 in (134 mm))
- Driest monthFebruary (1.0 in (25 mm))
- Annual precipitation32 in (809 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromVermillion 2 Se, 2 km away (1893-2026)