May weather forecast
South Dakota, USA

May in South Dakota sees a full embrace of spring, heralding the upcoming summer season with steadily rising temperatures and blooming landscapes. Daytime temperatures during this month comfortably oscillate between 65°F (18.3°C) and 75°F (23.9°C). As the nights grow shorter, they also become milder, with lows typically ranging from 45°F (7.2°C) to 55°F (12.8°C).

The geographical nuances of the Black Hills in the western segment of the state continue to play a role in the weather. While these regions generally align with the broader temperature trends of the state, occasional cooler spells or unexpected rain showers can be attributed to the area's distinctive topographical influences.

May is characterized by moderate rainfall, setting the stage for the wetter months to come. While the chances of snowfall are almost negligible, sporadic thunderstorms start making their presence known, especially in the southeastern regions which are closer to the Tornado Alley.

Having left the unpredictability of April behind, May stands as a relatively stable month in terms of weather. However, the state remains vigilant for the onset of severe weather patterns, given its proximity to the Tornado Alley.

When juxtaposed with April, May presents a warmer and more consistent weather profile, offering a glimpse into the hot and dry conditions that June will introduce as South Dakota transitions into the heart of the summer season.

---

• Sioux Falls - May »
  In Sioux Falls, South Dakota, during the entire year, the rain falls for 117.1 days and collects up to 20.71" (526mm) of precipitation. In Sioux Falls, during May, the rain falls for 16.6 days and regularly aggregates up to 2.83" (72mm) of precipitation.
• Rapid City - May »
  The month with the most rainfall in Rapid City is May, when the rain falls for 17.1 days and typically aggregates up to 2.28" (58mm) of precipitation. The month with the most rainfall in Rapid City is May, when the rain falls for 17.1 days and typically aggregates up to 2.28" (58mm) of precipitation.
• Aberdeen - May »
  Throughout the year, in Aberdeen, there are 54.8 snowfall days, and 19.13" (486mm) of snow is accumulated. On the first day of May in Aberdeen, South Dakota, sunrise is at 6:21 am and sunset at 8:40 pm.
• Brookings - May »
  In Brookings, South Dakota, in May, during 16.4 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. In Brookings, during the entire year, snow falls for 61.5 days and aggregates up to 21.38" (543mm) of snow.
• Watertown - May »
  In Watertown, during the entire year, snow falls for 64.3 days and aggregates up to 17.56" (446mm) of snow. In Watertown, during the entire year, the rain falls for 112.3 days and collects up to 18.78" (477mm) of precipitation.
• Mitchell - May »
  On the first day of May in Mitchell sunrise is at 6:24 am and sunset at 8:34 pm. In Mitchell in May, it is raining for 13.5 days, with typically 1.65" (42mm) of accumulated precipitation.
• Yankton - May »
  On the last day of the month, in Yankton sunrise is at 5:53 am and sunset at 9:00 pm CDT. In Yankton, South Dakota, during May, the rain falls for 16.9 days and regularly aggregates up to 3.78" (96mm) of precipitation.
• Pierre - May »
  On the last day of the month, in Pierre, South Dakota, sunrise is at 6:00 am and sunset at 9:17 pm CDT. The month with the most rainfall in Pierre is May, when the rain falls for 13.6 days and typically aggregates up to 2.24" (57mm) of precipitation.
• Huron - May »
  On the last day of the month, in Huron, sunrise is at 5:52 am and sunset at 9:09 pm CDT. On the last day of May, in Huron, sunrise is at 5:52 am and sunset at 9:09 pm CDT.
• Spearfish - May »
  During 2.2 snowfall days, in May, Spearfish aggregates 2.64" (67mm) of snow. During 2.2 snowfall days, in May, Spearfish aggregates 2.64" (67mm) of snow.
• Vermillion - May »
  On the last day of the month, in Vermillion, sunrise is at 5:52 am and sunset at 8:58 pm CDT. In Vermillion, during the entire year, snow falls for 30.7 days and aggregates up to 13.9" (353mm) of snow.
• Brandon - May »
  In Brandon, during the entire year, snow falls for 42.1 days and aggregates up to 18.94" (481mm) of snow. During 0.3 snowfall days, in May, Brandon aggregates 0.16" (4mm) of snow.