Helena, MT: records

4 October 2026: The hottest day on record in Helena, MT: 105°F on Friday 12 July 2002 and Sunday 24 August 1969.

The record begins: 1880

All-time records

Hottest day: 105°F; 12 July 2002, 24 August 1969
Coldest night: -42°F; 2 February 1996, 25 January 1957, 31 January 1893
Wettest day: 2.23 in; 12 October 1891
Warmest night: 74°F; 23 July 1936
Coldest day: -33°F; 31 January 1893

Daily records by decade

New daily records set in Helena, MT by decade since the 1900s: the most record highs, 115, came in the 1910s; the most record lows, 111, in the 1910s.

Record highs
Record lows

Every decade as a table

Decade	Record highs	Record lows	Years in the record
1880s	0	0	10
1890s	0	0	10
1900s	5	10	10
1910s	115	111	10
1920s	79	60	10
1930s	87	65	10
1940s	64	67	10
1950s	68	76	10
1960s	73	37	10
1970s	31	31	10
1980s	54	30	10
1990s	60	44	10
2000s	69	7	10
2010s	36	2	10
2020s	54	4	7

Records by month

Month	Highest	Lowest	Wettest day
January	63°F 25 January 2015, 7 January 1902	-42°F 25 January 1957, 31 January 1893	1.13 in 12 January 1881
February	69°F 24 February 1995, 27 February 1932	-42°F 2 February 1996	0.82 in 2 February 1895
March	78°F 30 March 2004	-30°F 4 March 2019, 25 March 1955	0.78 in 20 March 1898
April	86°F 29 April 1992, 25 April 1910	-10°F 1 April 1936	1.09 in 24 April 1900
May	95°F 28 May 1919	17°F 2 May 1954	2.06 in 3 May 1964
June	104°F 14 June 2021	30°F 10 June 1999, 13 June 1969	2.16 in 11 June 1915
July	105°F 12 July 2002	36°F 4 July 1971, 7 July 1952, 1 July 1898	1.36 in 30 July 1975
August	105°F 24 August 1969	28°F 25 August 1992	1.89 in 20 August 1933
September	102°F 7 September 2022	6°F 24 September 1926	2.10 in 18 September 1882
October	89°F 4 October 2024	-8°F 30 October 1991, 30 October 1935	2.23 in 12 October 1891
November	76°F 5 November 2020	-39°F 16 November 1959	1.30 in 25 November 1896
December	70°F 1 December 2021	-40°F 30 December 1880	1.00 in 26 December 1880, 25 December 1880

Streaks, months and years

Longest heat streak	19 days	14 July to 1 August 2021	A high of 90°F or above
Longest cold streak	33 days	8 January to 9 February 1949	A high of 32°F or below
Wettest month	6.67 in	May 1927
Driest month	0.00 in	September 2012
Wettest year	20.94 in	1975
Driest year	6.26 in	1973

Every record in words

The coldest night on record in Helena, MT: a low of -42°F on Friday 2 February 1996, Friday 25 January 1957 and Tuesday 31 January 1893.
The wettest day on record in Helena, MT: 2.23 in on Monday 12 October 1891.
The warmest night on record in Helena, MT: a low of 74°F on Thursday 23 July 1936.
The coldest day on record in Helena, MT: a high of -33°F on Tuesday 31 January 1893.
The longest run of days with a high of 90°F or above in Helena, MT: 19 days, from Wednesday 14 July to Sunday 1 August 2021.
The longest run of days with a high of 32°F or below in Helena, MT: 33 days, from Saturday 8 January to Wednesday 9 February 1949.
The wettest month on record in Helena, MT: May 1927, with 6.67 in of precipitation.
The driest month on record in Helena, MT: September 2012, with 0.00 in of precipitation.
The wettest year on record in Helena, MT: 1975, with 20.94 in of precipitation.
The driest year on record in Helena, MT: 1973, with 6.26 in of precipitation.

Helena, MT the day's answers