Earliest and Latest Days of 90° F in Rapid City

This is a list of the earliest and latest days in the year with a high temperature of at least 90 °F in Rapid City, South Dakota history. It is based on NOAA data from the years 1948–2024.

Also see:

Earliest 90 degree day in Rapid City?

The earliest in the year that Rapid City, South Dakota had a high temperature of at least 90 °F is April 18 which happened in 1987.

Latest 90 degree day in Rapid City?

The latest in the year that Rapid City, South Dakota had a high temperature of at least 90 °F is October 16 which happened in 1991.

Earliest Days ≥ 90 °F

Date	Year	Temperature
April 18	1987	90 °F
April 21	1980	92 °F
April 22	1989	93 °F
April 30	1992	92 °F
May 3	1985	91 °F
May 3	1952	93 °F
May 4	1986	91 °F
May 4	1966	90 °F
May 5	2004	93 °F
May 5	2000	92 °F
May 7	1992	90 °F
May 10	1961	90 °F
May 12	1960	90 °F
May 13	2013	90 °F
May 13	2007	91 °F
May 13	2001	92 °F
May 13	1955	92 °F
May 15	1987	90 °F
May 16	2012	91 °F
May 16	1979	91 °F

Latest Days ≥ 90 °F

Date	Year	Temperature
October 16	1991	91 °F
October 12	1956	90 °F
October 9	2003	92 °F
October 9	1965	90 °F
October 6	1993	94 °F
October 6	1975	91 °F
October 5	2021	90 °F
October 5	2010	90 °F
October 5	1963	93 °F
October 5	1949	93 °F
October 4	2011	90 °F
October 4	1963	94 °F
October 3	1963	90 °F
October 2	2011	96 °F
October 2	1997	91 °F
October 2	1992	90 °F
October 1	2011	90 °F
October 1	2005	94 °F
October 1	1992	92 °F
October 1	1953	93 °F