When Is the Last Frost in Sioux Falls? 2026 Dates Revealed

February in the Sioux Empire has been a mix of really nice days and freaking cold days. So, the usual. But, as we look ahead, what does spring have in store?

When Does Spring Officially Start in Sioux Falls?

Spring starts on March 20, 2026. Chances are we'll have some spring snow. Sioux Falls actually gets the bulk of its snow in the spring.

While the threat of snow will hang around for a while, our temperatures will be going up. Soon, we'll get a break from dipping below zero at night. And any snow we do get should melt pretty fast.

When it comes to spring temperatures, many people are wondering when they can start planting their garden. They want to wait until the last frost of the season. The last time we drop below 32 degrees.

What Is the 2026 Last Frost Date?

According to the Old Farmer’s Almanac, South Dakota, much of Minnesota, and northern Iowa will see our last frost at the usual time this year. The Almanac's 2026 Frost Dates Calculator says that Sioux Falls sees its last frost by May 6. That gives us a growing season of 146 days before the first frost is expected at the end of September.

In the north, around Watertown, the last frost is a week later, May 12. Out west, it's May 9 for Rapid City.

What the Old Farmer’s Almanac Predicts for Spring 2026

The Old Farmer’s Almanac's spring forecast for South Dakota says that we could expect it to be warmer than average with wet conditions north of Sioux Falls and dry conditions in the rest of the state.