National Weather Service United States Department of Commerce

Widespread Thunderstorms and Showers in the Southeast and Northwest

Widespread showers and thunderstorms may produce isolate instances of flash flooding across the Ozarks and Southeast through Friday. Scattered severe storms and heavy rain is expected across the Northwest U.S.. Gusty winds and low relative humidity will contribute to elevated fire weather over a portion of the northern Plains with a secondary threat in the Great Basin. Read More >

The following tables show the climate information for Rapid City, Gillette, Lead, Winner, Lemmon, Sundance, Spearfish, Newcastle, Hot Springs, and Custer on St. Patrick’s Day, as well as the weather in Rapid City and Gillette for the past 10 St. Patrick’s Days. Average highs around the area on March 17th are in the 40s, with average lows in the 20s.

In 2023, much of the area experienced their coldest St. Patrick's Day of the last decade, with highs generally in the 20s and light snow in some locations. However, in 2024, milder conditions returned, with near-normal temperatures and dry weather.