October weather forecast
South Dakota, USA

October in South Dakota is quintessentially autumnal, characterized by a refreshing crispness in the air, vibrant fall foliage, and the unmistakable anticipation of the approaching winter. Daytime temperatures during this month are notably cooler, ranging from 55°F (12.8°C) to 65°F (18.3°C). As nighttime blankets the state, temperatures dip further, settling between 35°F (1.7°C) and 45°F (7.2°C), introducing the first hints of frost in certain regions.

The Black Hills, with their unique topography, become a spectacle of colors as the trees reach the pinnacle of their autumn transformation. As is the norm, temperatures in this region can be slightly cooler, particularly during the twilight hours, amplifying the essence of the fall season.

Precipitation in October is subdued, with occasional rainfall events interspersed with clearer days. Thunderstorms are a rarity by this time, replaced by softer rains which often prepare the ground for the colder season that lies ahead.

When juxtaposed with September, October's temperatures are distinctly cooler. The state witnesses shorter days and longer nights, signaling the earth's tilt away from the sun in this hemisphere.

October's transition from the warm embrace of fall to the early whispers of winter is palpable. The golden hues of trees and foliage gradually give way to barren landscapes, preparing for the first snowfall. With the month's conclusion, there is a mounting expectation of November's chill, as South Dakota readies itself for the deep winter months that are on the horizon.

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• Sioux Falls - October »
  With an average relative humidity of 66%, October is the least humid month in Sioux Falls. In October, in Sioux Falls the rain falls for 8.6 days.
• Rapid City - October »
  In Rapid City during October, snow falls for 2.6 days and regularly aggregates up to 1.5" (38mm) of snow. In Rapid City, in October, snow falls for 2.6 days, with typically accumulated 1.5" (38mm) of snow.
• Aberdeen - October »
  In Aberdeen in October, it is raining for 7.8 days, with typically 1.61" (41mm) of accumulated precipitation. In Aberdeen in October, it is raining for 7.8 days, with typically 1.61" (41mm) of accumulated precipitation.
• Brookings - October »
  The least humid month in Brookings is October, with an average relative humidity of 68%. October is the least humid month in Brookings with an average relative humidity of 68%.
• Watertown - October »
  October is the first month it typically snows in Watertown, South Dakota. In Watertown, in October, during 8.3 rainfall days, 1.73" (44mm) of precipitation is typically accumulated.
• Mitchell - October »
  The months with the lowest humidity in Mitchell are September and October, with an average relative humidity of 63%. In Mitchell in October, during 6.8 rainfall days, 0.79" (20mm) of precipitation is typically accumulated.
• Yankton - October »
  In Yankton during October, the rain falls for 9.3 days and regularly aggregates up to 1.73" (44mm) of precipitation. October is the least humid month in Yankton, with an average relative humidity of 64%.
• Pierre - October »
  In Pierre, in October, during 7.5 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. In Pierre, in October, during 7.5 rainfall days, 0.98" (25mm) of precipitation is typically accumulated.
• Huron - October »
  On the first day of October in Huron, South Dakota, sunrise is at 7:31 am and sunset at 7:12 pm. In Huron, during October, the rain falls for 8.1 days and regularly aggregates up to 1.57" (40mm) of precipitation.
• Spearfish - October »
  In Spearfish, South Dakota, during October, snow falls for 4.1 days and regularly aggregates up to 4.21" (107mm) of snow. In Spearfish, in October, snow falls for 4.1 days, with typically accumulated 4.21" (107mm) of snow.
• Vermillion - October »
  On the first day of October in Vermillion sunrise is at 7:25 am and sunset at 7:08 pm. October is the least humid month in Vermillion, South Dakota, with an average relative humidity of 65%.
• Brandon - October »
  With an average relative humidity of 67%, October is the least humid month in Brandon, South Dakota. January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Brandon, South Dakota.