With a population of around 1,100, De Smet sits in South Dakota, United States. The city operates in the Central Time Zone.
In 2025, De Smet recorded an average annual temperature of 47°F. The hottest temperatures reached 95°F in June; the coolest were -20°F in February. Total precipitation for the year was 28 inches, with the wettest month being August. Snowfall for the year totaled approximately 9 inches.
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