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.

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• Sioux Falls - May »
  On the last day of the month, in Sioux Falls sunrise is at 5:48 am and sunset at 9:00 pm CDT. In Sioux Falls in May, during 16.6 rainfall days, 2.83" (72mm) of precipitation is typically accumulated.
• Rapid City - May »
  In Rapid City during the entire year, snow falls for 50.4 days and aggregates up to 24.41" (620mm) of snow. In Rapid City, during May, the rain falls for 17.1 days and regularly aggregates up to 2.28" (58mm) of precipitation.
• Aberdeen - May »
  On the last day of the month, in Aberdeen, sunrise is at 5:48 am and sunset at 9:14 pm CDT. In Aberdeen, during May, the rain falls for 13 days and regularly aggregates up to 2.32" (59mm) of precipitation.
• Brookings - May »
  Throughout the year, in Brookings there are 125.5 rainfall days, and 21.65" (550mm) of precipitation is accumulated. On the first day of May in Brookings sunrise is at 6:16 am and sunset at 8:31 pm.
• Watertown - May »
  In Watertown during the entire year, the rain falls for 112.3 days and collects up to 18.78" (477mm) of precipitation. In Watertown in May, it is raining for 16.3 days, with typically 2.52" (64mm) of accumulated precipitation.
• Mitchell - May »
  The month with the most rainfall in Mitchell is May, when the rain falls for 13.5 days and typically aggregates up to 1.65" (42mm) of precipitation. In Mitchell snow does not fall in May through September.
• Yankton - May »
  The month with the most rainfall in Yankton is May, when the rain falls for 16.9 days and typically aggregates up to 3.78" (96mm) of precipitation. On the last day of the month, in Yankton sunrise is at 5:53 am and sunset at 9:01 pm CDT.
• Pierre - May »
  On the last day of the month, in Pierre, sunrise is at 6:00 am and sunset at 9:18 pm CDT. In Pierre, during May, the rain falls for 13.6 days and regularly aggregates up to 2.24" (57mm) of precipitation.
• Huron - May »
  On the first day of May in Huron sunrise is at 6:22 am and sunset at 8:37 pm. In Huron snow does not fall in May through September.
• Spearfish - May »
  The month with the most rainfall in Spearfish is May, when the rain falls for 15.6 days and typically aggregates up to 2.32" (59mm) of precipitation. The month with the most rainfall in Spearfish is May, when the rain falls for 15.6 days and typically aggregates up to 2.32" (59mm) of precipitation.
• Vermillion - May »
  In Vermillion during May, the rain falls for 16.5 days and regularly aggregates up to 3.23" (82mm) of precipitation. In Vermillion, during May, the rain falls for 16.5 days and regularly aggregates up to 3.23" (82mm) of precipitation.
• Brandon - May »
  In Brandon during May, the rain falls for 16.6 days and regularly aggregates up to 2.8" (71mm) of precipitation. In Brandon, South Dakota, during the entire year, snow falls for 42.1 days and aggregates up to 18.94" (481mm) of snow.