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 »
  July, marked by an average high-temperature of 82.4°F (28°C) and a low-temperature of 63.1°F (17.3°C), is the warmest month in Sioux Falls, South Dakota. The month with the most sunshine in Sioux Falls is July, with an average of 10.7h of sunshine.
• Rapid City - July »
  The warmest month in Rapid City is July, with an average high-temperature of 84.7°F (29.3°C) and an average low-temperature of 63.3°F (17.4°C). In Rapid City during July, the rain falls for 13.5 days and regularly aggregates up to 2.05" (52mm) of precipitation.
• Aberdeen - July »
  On the first day of July in Aberdeen sunrise is at 5:49 am and sunset at 9:26 pm. In Aberdeen, South Dakota, temperatures reach their average annual highs in July, measuring 84.7°F (29.3°C) and a minimum average of 63.1°F (17.3°C).
• Brookings - July »
  The warmest time of the year in Brookings, South Dakota, is July, with temperatures averaging a high of 81.3°F (27.4°C) and a low of 62.2°F (16.8°C). On the first day of July in Brookings, South Dakota, sunrise is at 5:47 am and sunset at 9:14 pm.
• Watertown - July »
  In Watertown, South Dakota, July is the warmest month, with temperatures averaging a high of 80.8°F (27.1°C) and a low of 60.8°F (16°C). July brings in the peak of summer with Watertown experiencing the warmest temperatures of the year.
• Mitchell - July »
  In Mitchell, July is the month with the highest recorded average temperatures, measuring a high of 85.6°F (29.8°C) and a low of 64.6°F (18.1°C). In July, the average sunshine duration in Mitchell is 11.1h.
• Yankton - July »
  Yankton experiences its highest average temperatures in July, reaching a peak of 84.9°F (29.4°C) and a minimum of 64.9°F (18.3°C). On the first day of July in Yankton sunrise is at 5:55 am and sunset at 9:12 pm.
• Pierre - July »
  The month with the highest UV index in Pierre is July, with an average maximum UV index of 7. In Pierre in July, during 12.3 rainfall days, 1.93" (49mm) of precipitation is typically accumulated.
• Huron - July »
  On the first day of July in Huron sunrise is at 5:52 am and sunset at 9:20 pm. In Huron in July, during 12.5 rainfall days, 2.76" (70mm) of precipitation is typically accumulated.
• Spearfish - July »
  In Spearfish in July, during 11.3 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. Spearfish's temperatures peak on average in July, reaching 83.8°F (28.8°C) at their highest and 61°F (16.1°C) at their lowest.
• Vermillion - July »
  In Vermillion, South Dakota, in July, it is raining for 12.6 days, with typically 1.89" (48mm) of accumulated precipitation. In Vermillion, South Dakota, the average sunshine duration in July is 10.9h.
• Brandon - July »
  On the first day of July in Brandon, South Dakota, sunrise is at 5:49 am and sunset at 9:11 pm. The highest temperatures in Brandon, South Dakota, are recorded in July, with averages reaching a high of 82.2°F (27.9°C) and a low of 62.6°F (17°C).