The most pleasant months of the year for South Dakota are June, September and August. Get the latest coronavirus (COVID-19) updates for the USA with current travel advice, statistics and online resources.. Below is the hottest it usually gets at popular destinations in South Dakota.Select a destination to see the best time to go based on your preferred weather. Our next trip was the last week of June and the weather was beautiful - high 70's and low 80's and all sunny days. Weather in South Dakota. Free Long Range Weather Forecast for Rapid City, South Dakota. South Dakota, the 17th largest state in the nation, covers so much area that it has several different geographic areas, each with its own weather pattern. MITCHELL, S.D. In South Dakota, there are 3 comfortable months with high temperatures in the range of 70-85°. FALL. Fall weather tends to be mild with an average daytime high of 57°F (14°C) and low of 44°F (7°C), although temperatures and precipitation can vary. June Tornadoes in South Dakota Tie National Record. Calendar overview of Months Weather Forecast. The first month of the summer, June, is a moderately hot month in Keystone, South Dakota, with average temperature varying between 50°F (10°C) and 77°F (25°C). The year we came in early June we had 3 straight days of all day rains and cool weather. Weather Forecast Office. June has the longest days, with the average temperatures in the 51°F (10.6°C) to 71°F (21.7°C) range. A powerful upper-level disturbance moving through the Rockies and Plains on June 6, 2020 sparked the development of a line of thunderstorms that brought widespread damaging winds from Utah and Colorado through northeastern Wyoming, western South Dakota, and southwestern North Dakota. (KELO) — Severe weather moved through south-central KELOLAND Monday night. June weather forecast for Mount Rushmore National Memorial, South Dakota. We have been to the BH on two different occassions in June. Free Long Range Weather Forecast for Rapid City, South Dakota June 2021. The weather also varies depending on … Calendar overview of Months Weather Forecast. The variety of trees in South Dakota become color-changing canvases in the autumn. Visitors make foliage pilgrimages to places like Spearfish Canyon and Sica Hollow State Park to take in the gorgeous transition. Weather.gov > Sioux Falls, SD > June Tornadoes in South Dakota Tie National Record Best time to go to South Dakota. I agree with both Roses and Lohrs. Temperature In Keystone, the average high-temperature in June increases, from a comfortable 66.2°F (19°C) in May, to a warm 77°F (25°C).The average low-temperature, in Keystone, is 50°F (10°C). Sioux Falls, SD. On Monday night, Golf ball-sized hail was reported in … In … weather in South Dakota … free Long Range weather Forecast Rapid! The BH on two different occassions in June for South Dakota of trees in South are! 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