Number of Days of 100 °F in Helena by Year

This page contains a list of the number of days in each year that the high temperature equaled or exceeded 100 degrees Fahrenheit in Helena, Montana, between 1893 and 2024.

Also see:

Which year had the most 100° days?

Based on NOAA records, the year 2003 holds the record for the most 100 °F days in Helena history. There were 9 days with a high temperature of at least 100 degrees that year.

How many so far this year (2024)?

It has not reached 100 degrees Fahrenheit in Helena so far in 2024. As of April 29, the highest temperature this year is 78 °F.

The last time it reached at least 100° F was August 17, 2023.

Years marked with a gold background have more than 5% incomplete data
Click column headers to sort

Year	Rank	Days >= 100 °F
2024	35	0
2023	6	3
2022	4	5
2021	3	6
2020	17	1
2019	35	0
2018	17	1
2017	17	1
2016	35	0
2015	6	3
2014	35	0
2013	17	1
2012	35	0
2011	35	0
2010	35	0
2009	35	0
2008	35	0
2007	2	8
2006	5	4
2005	15	2
2004	35	0
2003	1	9
2002	6	3
2001	6	3
2000	17	1
1999	17	1
1998	35	0
1997	35	0
1996	35	0
1995	35	0
1994	35	0
1993	35	0
1992	35	0
1991	35	0
1990	6	3
1989	35	0
1988	17	1
1987	35	0
1986	35	0
1985	6	3
1984	35	0
1983	17	1
1982	35	0
1981	17	1
1980	35	0
1979	35	0
1978	35	0
1977	35	0
1976	35	0
1975	35	0
1974	35	0
1973	17	1
1972	35	0
1971	35	0
1970	35	0
1969	17	1
1968	35	0
1967	35	0
1966	17	1
1965	35	0
1964	35	0
1963	35	0
1962	35	0
1961	6	3
1960	17	1
1959	35	0
1958	35	0
1957	35	0
1956	35	0
1955	35	0
1954	35	0
1953	35	0
1952	35	0
1951	35	0
1950	35	0
1949	17	1
1948	35	0
1947	35	0
1946	35	0
1945	35	0
1944	35	0
1943	35	0
1942	35	0
1941	35	0
1940	15	2
1939	17	1
1938	35	0
1937	35	0
1936	17	1
1935	35	0
1934	35	0
1933	35	0
1932	35	0
1931	6	3
1930	35	0
1929	17	1
1928	35	0
1927	35	0
1926	35	0
1925	35	0
1924	35	0
1923	35	0
1922	35	0
1921	35	0
1920	35	0
1919	35	0
1918	35	0
1917	35	0
1916	35	0
1915	35	0
1914	35	0
1913	35	0
1912	35	0
1911	35	0
1910	35	0
1909	35	0
1908	35	0
1907	35	0
1906	35	0
1905	35	0
1904	35	0
1903	35	0
1902	35	0
1901	35	0
1900	17	1
1899	35	0
1898	35	0
1897	35	0
1896	35	0
1895	35	0
1894	35	0
1893	6	3

Weather Station Details

Years	Station	Coordinates
1939–2024	Helena Regional Airport	location
1893–1938	Helna	location