In South Dakota, summers extend pleasantly and warmly, while winters usher in freezing temperatures, snow, and brisk winds. Throughout the year, the weather tends to be partly cloudy. Temperature fluctuations range from 10°F to 84°F, with extremes rarely dipping below -10°F or rising above 93°F.
For those seeking warm-weather activities, the optimal time to visit South Dakota, according to tourism scores, falls between mid-June and early September.
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In South Dakota, the warm season spans 3.9 months, from May 22 to September 18, boasting average daily high temperatures above 73°F. July stands out as the hottest month, with an average high of 84°F and a low of 64°F.
Conversely, the cold season prevails for 3.3 months, from November 24 to March 2, featuring average daily high temperatures below 38°F. January marks the coldest month, with an average low of 11°F and a high of 27°F.
To illustrate the nuances within months rather than just the monthly totals, we present the rainfall accumulated over a sliding 31-day period centered around each day of the year in South Dakota. There's notable seasonal variation in monthly rainfall.
Rain showers grace South Dakota for 8.6 months, stretching from March 3 to November 22, with a sliding 31-day rainfall of at least 0.5 inches. June reigns as the wettest month, with an average rainfall of 3.7 inches.
Conversely, a dry spell sweeps through for 3.4 months, spanning from November 22 to March 3. January marks the driest month, with an average rainfall of 0.1 inches.
Similar to rainfall, we analyze snowfall accumulated over a sliding 31-day period centered around each day of the year in South Dakota, revealing seasonal variations.
Snow blankets South Dakota for 5.8 months, spanning from October 29 to April 23, with a sliding 31-day snowfall of at least 1.0 inches. December stands out as the snowiest month, boasting an average snowfall of 2.9 inches.
Conversely, a snow-free stretch extends for 6.2 months, from April 23 to October 29. July 14 marks the period of least snowfall, with an average total accumulation of 0.0 inches.
