SIOUX FALLS, S.D. – South Dakota’s fall chill is back, bringing brisk winds, patchy frost, and a quick cooldown early this week. After a damp start to the weekend, dry and breezy conditions return Sunday before a stronger push of cold air hits by Monday night.
According to the National Weather Service in Sioux Falls, gusty northwest winds between 25 and 40 mph will develop Monday and persist into Tuesday across eastern South Dakota and the I-29 corridor. These winds could locally elevate fire danger in open rural areas. Residents should secure outdoor decorations and trash bins ahead of the gusts and use caution on east-west highways, where crosswinds may affect travel.
Tuesday morning could deliver a frosty wake-up as temperatures drop into the mid-30s under clear skies. Sensitive vegetation should be covered, and gardeners are urged to harvest or protect plants before the chill arrives. Despite the cold start, Tuesday afternoon will rebound to the mid-50s, with calm sunshine dominating the rest of the week.
The pattern stabilizes by Wednesday, offering perfect fall conditions — sunny skies, light winds, and highs in the 60s through Friday. For leaf-peepers and pumpkin patch visitors, this stretch marks a calm, classic October setup after a breezy start.
Bundle up for early mornings and brace for wind Monday — fall’s chill is settling firmly across eastern South Dakota.
Five-Day Forecast for Sioux Falls, SD:
Sat: 57/38 – Showers early; breezy and cool.
Sun: 60/47 – Sunny and mild; light northwest breeze.
Mon: 63/40 – Mostly sunny; gusts up to 40 mph.
Tue: 54/34 – Sunny after frost; crisp fall air.
Wed: 63/40 – Bright and calm; classic fall day.
