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Montana · THREADEX · 1880–2026

Helena, MT

46.604°N, 111.989°W · station HLNthr · 147 years of record
71°F
forecast high · Oct 17

7-Day Forecast

NWS NDFD forecast high temperature for Helena.
71°SAT10/1762°SUN10/1867°MON10/1963°TUE10/2060°WED10/2161°THU10/2251°FRI10/23

This Day in History

Every year's high on each of the next 7 forecast dates at Helena — toggle a day below. The forecast line shows where it lands; the ringed bar is the hottest on record.

Ranks

#11 / 146
warmest Oct 17 in 146 yrs of record

Warmest Oct 17 ever

80°F
set in 2003

Coolest Oct 17 ever

30°F
set in 1951
Forecast high 71°F — 11th warmest Oct 17 of 146 years · record 80°F (2003) · warmest since 2024.
1880: 48°F1881: 42°F1882: 45°F1883: 43°F1884: 64°F1885: 56°F1886: 47°F1887: 52°F1888: 50°F1889: 68°F1890: 47°F1891: 55°F1892: 43°F1893: 42°F1894: 59°F1895: 67°F1896: 63°F1897: 52°F1898: 42°F1899: 42°F1900: 67°F1901: 72°F1902: 60°F1903: 71°F1904: 54°F1905: 35°F1906: 48°F1907: 52°F1908: 38°F1909: 46°F1910: 61°F1911: 55°F1912: 67°F1913: 43°F1914: 67°F1915: 67°F1916: 73°F1917: 36°F1918: 52°F1919: 55°F1920: 48°F1921: 64°F1922: 60°F1923: 48°F1924: 68°F1925: 35°F1926: 59°F1927: 78°F1928: 60°F1929: 67°F1930: 32°F1931: 65°F1932: 49°F1933: 43°F1934: 40°F1935: 55°F1936: 57°F1937: 55°F1938: 35°F1939: 68°F1940: 65°F1941: 60°F1942: 62°F1943: 63°F1944: 63°F1945: 58°F1946: 48°F1947: 61°F1948: 41°F1949: 37°F1950: 57°F1951: 30°F1952: 56°F1953: 69°F1954: 62°F1955: 69°F1956: 68°F1957: 53°F1958: 71°F1959: 63°F1960: 63°F1961: 58°F1962: 60°F1963: 70°F1964: 50°F1965: 56°F1966: 54°F1967: 62°F1968: 47°F1969: 47°F1970: 58°F1971: 49°F1972: 55°F1973: 66°F1974: 75°F1975: 70°F1976: 54°F1977: 68°F1978: 58°F1979: 60°F1980: 41°F1981: 54°F1982: 59°F1983: 52°F1984: 40°F1985: 61°F1986: 64°F1987: 59°F1988: 70°F1989: 52°F1990: 53°F1991: 50°F1992: 46°F1993: 55°F1994: 55°F1995: 61°F1996: 45°F1997: 70°F1998: 53°F1999: 50°F2000: 64°F2001: 57°F2002: 68°F2003: 80°F2004: 60°F2005: 76°F2006: 41°F2007: 48°F2008: 56°F2009: 73°F2010: 62°F2011: 56°F2012: 59°F2013: 47°F2014: 65°F2015: 70°F2016: 61°F2017: 75°F2018: 64°F2019: 62°F2020: 62°F2021: 74°F2022: 67°F2023: 63°F2024: 74°F2025: 60°F71° forecast3035404550556065707580188018901900191019201930194019501960197019801990200020102020
📖 Helena's full Climate Almanac →

The Numbers

Forecast high · Oct 1771°F
Hottest this date since2024
This-date record80°F
This-date rank#11 of 146
Hottest at any time since2026
All-time record105°F (1969)
Odds to tie/break0.0% (daily)
Period of record1880–2026

Record Book

The hottest and coldest ever recorded at Helena in each calendar month, and for the whole 1880–2026 record — with the year each was set.
MonthRecord HighRecord Low
Jan63°FJan 7, 1902-42°FJan 31, 1893
Feb69°FFeb 27, 1932-42°FFeb 2, 1996
Mar78°FMar 30, 2004-30°FMar 25, 1955
Apr86°FApr 25, 1910-10°FApr 1, 1936
May95°FMay 28, 191917°FMay 2, 1954
Jun104°FJun 14, 202130°FJun 13, 1969
Jul105°FJul 12, 200236°FJul 1, 1898
Aug105°FAug 24, 196928°FAug 25, 1992
Sep102°FSep 7, 20226°FSep 24, 1926
Oct89°FOct 4, 2024-8°FOct 30, 1935
Nov76°FNov 5, 2020-39°FNov 16, 1959
Dec70°FDec 1, 2021-40°FDec 30, 1880
All-time105°FAug 24, 1969-42°FJan 31, 1893

2026 Records So Far

Records set or tied at Helena so far this year — through Oct 15.

Record Highs in 2026

7 broke
plus 3 tied — daily record highs set this year

Record Lows in 2026

0 broke
plus 0 tied — daily record lows set this year

Record Warm Nights & Cold Days

Two more daily records, kept separate from the rankings: the warmest a night has ever stayed (record high minimum) and the coldest a day has ever gotten (record low maximum) — the flip side of the usual record high and low.

Warmest low ever

74°F
record high minimum — the night it never cooled · Jul 23, 1936

Coldest high ever

-33°F
record low maximum — the day it never warmed · Jan 31, 1893
MonthWarmest lowColdest high
Jan47°FJan 18, 1919-33°FJan 31, 1893
Feb48°FFeb 18, 1930-27°FFeb 2, 1887
Mar50°FMar 15, 2015-10°FMar 6, 1951
Apr57°FApr 23, 189110°FApr 1, 1936
May65°FMay 31, 193631°FMay 1, 1899
Jun69°FJun 22, 190039°FJun 7, 1895
Jul74°FJul 23, 193646°FJul 24, 1918
Aug72°FAug 9, 188244°FAug 22, 1992
Sep65°FSep 13, 188223°FSep 23, 1934
Oct61°FOct 3, 19175°FOct 31, 1935
Nov58°FNov 7, 1931-12°FNov 27, 1896
Dec51°FDec 1, 2021-28°FDec 29, 1880
All-time74°FJul 23, 1936-33°FJan 31, 1893

Hot Streaks

Current run

0 days
consecutive days with a high ≥ 90°F

Longest ever

19 days
record run, ended Aug 1 2021

So far in 2026

28 days
days with a high ≥ 90°F this year

Climate Normals

Normal high & low by month, from Helena's own 1991–2020 record. Today's normal high: 58°F · forecast is +12° vs normal.
Jan: 33°FJan: 13°FFeb: 37°FFeb: 17°FMar: 48°FMar: 24°FApr: 57°FApr: 32°FMay: 66°FMay: 41°FJun: 75°FJun: 49°FJul: 86°FJul: 55°FAug: 85°FAug: 53°FSep: 73°FSep: 44°FOct: 58°FOct: 33°FNov: 43°FNov: 22°FDec: 33°FDec: 14°FJFMAMJJASOND

Sun & Location

Sun & Daylight Today

Sunrise6:47 AM
Sunset5:40 PM
Solar noon12:13 PM
Daylight10h 53m · losing 23 min/wk
Local standard time (no DST), level horizon.

Location

46.60°N, 111.99°W

Nearby Stations

Great Falls, MT66 mi NEMissoula, MT102 mi WKalispell, MT158 mi NWHavre, MT169 mi NEBillings, MT173 mi EChallis, ID179 mi SW

The Last 6 Weeks

Helena's observed daily high for the last six weeks — a white ring marks any day that broke or tied its daily record for that date.
Helena, MT — last six weeks of daily high

2026 So Far

Every day this year against Helena's own record — the record high, the normal, and the full span ever seen. A shareable look at where the year stands.
Helena, MT — 2026 daily high trace
Download year chart

Every Day Since 1880

Each cell is one day's high at Helena, coloured by temperature — 147 years of record, so heat waves read as warm streaks and cold snaps as blue.
Helena, MT daily high heat map 1880–2026

Days Above the Mark

How many days a year hit a given high at Helena — counted through Oct 17 each year, so you can see whether 2026 is running hot. Pick a threshold:
28 days ≥90°F so far in 2026 — tied for the 22nd most in 147 years. Normal for this point: 17. Record: 54 in 2022.

Share Card

A ready-to-share summary of Helena's outlook — post it, or link this page.
Helena, MT hot share card
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