Helena Weather in October
Average highs run from 79°F on October 1 to 66°F on October 31, and lows from 54°F to 41°F. Normal precipitation for the month is 3.03 in over about 6 wet days.
October day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
October at a glance
- Average high
- 73°F
- Average low
- 48°F
- Precipitation
- 3.03 in
- Snowfall
- 0.2 in
- Record high
- 100°FOct 1, 1910
- Record low
- 17°FOct 30, 1917
- Chance of a freeze
- 50%
- Days of 90°F or more
- 1.6
- Daylight
- 11 h 48 min to 10 h 41 min
- Cloud cover
- 45%
- Humidity
- 61%
- Dew point
- 45°F
- Wind
- 11.4 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Oct 1 | 79°F | 54°F | 100°F 1910 | 33°F 1958 | 20% | 0% |
| Oct 2 | 79°F | 54°F | 98°F 1938 | 39°F 1985 | 20% | 0% |
| Oct 3 | 79°F | 53°F | 98°F 1951 | 41°F 2010 | 20% | 0% |
| Oct 4 | 78°F | 53°F | 98°F 1917 | 38°F 1999 | 20% | 0% |
| Oct 5 | 78°F | 52°F | 97°F 1963 | 36°F 1902 | 20% | 0% |
| Oct 6 | 77°F | 52°F | 98°F 1939 | 37°F 1991 | 20% | 0% |
| Oct 7 | 77°F | 52°F | 96°F 1918 | 34°F 1921 | 20% | 0% |
| Oct 8 | 76°F | 51°F | 97°F 1956 | 30°F 2000 | 20% | 0% |
| Oct 9 | 76°F | 51°F | 94°F 1928 | 25°F 2000 | 20% | 0% |
| Oct 10 | 75°F | 50°F | 96°F 1965 | 27°F 2000 | 20% | 0% |
| Oct 11 | 75°F | 50°F | 93°F 1979 | 34°F 1932 | 20% | 0% |
| Oct 12 | 75°F | 49°F | 94°F 1978 | 29°F 1917 | 20% | 0% |
| Oct 13 | 74°F | 49°F | 95°F 2024 | 30°F 1917 | 20% | 0% |
| Oct 14 | 74°F | 48°F | 91°F 1911 | 31°F 1969 | 20% | 0% |
| Oct 15 | 73°F | 48°F | 97°F 1912 | 32°F 2018 | 20% | 0% |
| Oct 16 | 73°F | 47°F | 93°F 1917 | 32°F 2024 | 20% | 0% |
| Oct 17 | 72°F | 47°F | 88°F 1909 | 31°F 1976 | 19% | 0% |
| Oct 18 | 72°F | 47°F | 92°F 2016 | 32°F 1948 | 19% | 1% |
| Oct 19 | 71°F | 46°F | 90°F 2005 | 20°F 1917 | 19% | 1% |
| Oct 20 | 71°F | 46°F | 93°F 1979 | 22°F 1917 | 19% | 1% |
| Oct 21 | 70°F | 45°F | 92°F 1939 | 28°F 1905 | 19% | 1% |
| Oct 22 | 70°F | 45°F | 92°F 1939 | 28°F 1910 | 19% | 1% |
| Oct 23 | 70°F | 44°F | 92°F 1939 | 25°F 1917 | 19% | 1% |
| Oct 24 | 69°F | 44°F | 90°F 1939 | 28°F 1917 | 19% | 1% |
| Oct 25 | 69°F | 44°F | 92°F 2024 | 29°F 1917 | 19% | 1% |
| Oct 26 | 68°F | 43°F | 90°F 1922 | 25°F 1904 | 19% | 1% |
| Oct 27 | 68°F | 43°F | 89°F 1922 | 21°F 1957 | 19% | 1% |
| Oct 28 | 67°F | 42°F | 90°F 1938 | 20°F 1925 | 19% | 1% |
| Oct 29 | 67°F | 42°F | 92°F 1950 | 21°F 1913 | 19% | 1% |
| Oct 30 | 66°F | 41°F | 90°F 1937 | 17°F 1917 | 19% | 1% |
| Oct 31 | 66°F | 41°F | 87°F 1938 | 17°F 1993 | 19% | 1% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- October 1
- sunrise 7:28 AM, sunset 7:16 PM
- October 31
- sunrise 7:56 AM, sunset 6:37 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00344019 (Helena 1 Sse), public domain. Records: NOAA GHCN-Daily, station USC00342912, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.