July weather forecast
South Dakota, USA

July stands as the zenith of the summer season in South Dakota, showcasing the warmest temperatures of the year. Daytime temperatures frequently scale the range from 80°F (26.7°C) to 90°F (32.2°C), with occasional surges beyond, especially in the semi-arid western belts. Nighttimes, while considerably cooler, remain warm, oscillating between 60°F (15.6°C) and 70°F (21.1°C).

The Black Hills region, with its distinctive topographical attributes, might experience slightly lower temperatures, especially during the nights. However, this region too, is not immune to the overall warmth that engulfs the state during July.

Rainfall in July is moderate, but what stands out is the propensity for thunderstorms. The southeastern regions, lying closer to the Tornado Alley, are particularly susceptible to these weather phenomena. These thunderstorms can sometimes escalate to severe levels, requiring caution for residents and tourists alike.

The oppressive heat can occasionally give rise to short-lived but intense rain showers. These provide a brief respite but can add to the overall humidity, creating a sticky ambiance at times.

In comparison to June, July exhibits a slight uptick in temperatures, establishing itself as the hottest month of the year for South Dakota. As the month concludes, there's an anticipatory air, with residents and nature alike gearing up for the milder and more temperate conditions that August will usher in, signaling the gradual transition towards autumn.

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• Sioux Falls - July »
  On the last day of July, in Sioux Falls sunrise is at 6:15 am and sunset at 8:51 pm CDT. Sioux Falls witnesses the warmest weather in July, with temperatures averaging a high of 82.4°F (28°C) and a low of 63.1°F (17.3°C).
• Rapid City - July »
  The months with the highest UV index in Rapid City are June and July, with an average maximum UV index of 6. On the first day of July in Rapid City, sunrise is at 5:13 am and sunset at 8:39 pm.
• Aberdeen - July »
  In July, in Aberdeen the rain falls for 12.2 days. With an average of 11.1h of sunshine, July has the most sunshine of the year in Aberdeen, South Dakota.
• Brookings - July »
  The months with the highest UV index in Brookings are June and July, with an average maximum UV index of 6. On the first day of July in Brookings sunrise is at 5:47 am and sunset at 9:15 pm.
• Watertown - July »
  July brings in the peak of summer with Watertown experiencing the warmest temperatures of the year. July has the most sunshine of the year in Watertown with an average of 10.7h of sunshine.
• Mitchell - July »
  On the first day of July in Mitchell sunrise is at 5:54 am and sunset at 9:17 pm. In July, the average sunshine duration in Mitchell is 11.1h.
• Yankton - July »
  July is the hottest month in Yankton with the mercury level reaching a top of 84.9°F (29.4°C). July has the most sunshine of the year in Yankton with an average of 10.8h of sunshine.
• Pierre - July »
  The month with the most sunshine is July, with an average of 11.5h of sunshine. With an average maximum UV index of 7, July is the month with the highest UV index in Pierre, South Dakota.
• Huron - July »
  July is the month that records the highest temperatures in Huron, with averages ranging from a high of 85.6°F (29.8°C) to a low of 64.2°F (17.9°C). July stands at the pinnacle of summer in Huron with the highest recorded temperature, reaching a scorching 85.6°F (29.8°C) average.
• Spearfish - July »
  In Spearfish in July, it is raining for 11.3 days, with typically 1.69" (43mm) of accumulated precipitation. Spearfish notes the warmest temperatures in July, with a average high of 83.8°F (28.8°C) and a low of 61°F (16.1°C).
• Vermillion - July »
  The month with the most sunshine in Vermillion is July, with an average of 10.9h of sunshine. July, with average temperatures reaching a high of 84.4°F (29.1°C) and a low of 64.9°F (18.3°C), is the warmest month in Vermillion.
• Brandon - July »
  In Brandon during July, the rain falls for 12.9 days and regularly aggregates up to 2.24" (57mm) of precipitation. July has the most sunshine of the year in Brandon, South Dakota, with an average of 10.7h of sunshine.