Sioux Falls weather in May
Mild and comfortable, with some rainy days. Average highs of 20°C and lows of 10°C, with around 12 rainy days expected throughout the month.
While May isn't our top-rated month for Sioux Falls, it has its own appeal — typically lower prices, fewer crowds, and a more local feel.
Average high
20°C
Average low
10°C
Rainy days
12 days
Best months to visit
June, July, August, September
What to do in Sioux Falls in May
Whatever the weather, Sioux Falls rewards curious visitors. Here are some of the best ways to spend your time:
Hike trails to multiple waterfall viewing areas
Explore Falls Park's scenic riverside paths and gardens
Visit the Sioux Falls Art Museum in a historic building
Tour nearby historic sites like Fort Sumter battlefield
Paddleboard the Big Sioux River
Shop and dine in downtown's walkable core
What to pack for May
Light layers work well — T-shirts and shorts for the day, a light jacket for evenings. Comfortable walking shoes are a must. Bring a compact umbrella just in case.
Browse other months
January
-3C
Cold, with occasional showers.
February
-1C
Cold, with occasional showers.
March
7C
Cold, with occasional showers.
April
13C
Cool, with occasional showers.
May (you are here)
20C
Mild and comfortable, with some rainy days.
Recommended
June
27C
Warm and pleasant, with some rainy days.
Recommended
July
28C
Warm and pleasant, with occasional showers.
Recommended
August
27C
Warm and pleasant, with some rainy days.
Recommended
September
24C
Mild and comfortable, with occasional showers.
October
15C
Cool, with occasional showers.
November
7C
Cold, with occasional showers.
December
0C
Cold, with occasional showers.
Book your May trip to Sioux Falls
Find hotels, tours and experiences for the perfect escape.
