Mount Vernon Weather in October
Average highs run from 65°F on October 1 to 55°F on October 31, and lows from 46°F to 41°F. Normal precipitation for the month is 4.98 in over about 18 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
- 60°F
- Average low
- 43°F
- Precipitation
- 4.98 in
- Snowfall
- 0.1 in
- Record high
- 86°FOct 2, 1987
- Record low
- 20°FOct 30, 1935
- Chance of a freeze
- 36%
- Daylight
- 11 h 39 min to 9 h 57 min
- Cloud cover
- 69%
- Humidity
- 85%
- Dew point
- 46°F
- Wind
- 4.9 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 | 65°F | 46°F | 79°F 1945 | 31°F 1916 | 48% | 0% |
| Oct 2 | 65°F | 46°F | 86°F 1987 | 29°F 1916 | 48% | 0% |
| Oct 3 | 64°F | 46°F | 82°F 1902 | 27°F 1916 | 49% | 0% |
| Oct 4 | 64°F | 45°F | 85°F 1899 | 27°F 1916 | 49% | 0% |
| Oct 5 | 64°F | 45°F | 78°F 2011 | 30°F 1916 | 50% | 0% |
| Oct 6 | 63°F | 45°F | 80°F 1980 | 33°F 1900 | 51% | 0% |
| Oct 7 | 63°F | 45°F | 79°F 1908 | 31°F 1909 | 51% | 0% |
| Oct 8 | 62°F | 45°F | 81°F 1951 | 30°F 1900 | 52% | 0% |
| Oct 9 | 62°F | 44°F | 83°F 1934 | 30°F 1919 | 53% | 0% |
| Oct 10 | 62°F | 44°F | 82°F 1936 | 31°F 1924 | 54% | 0% |
| Oct 11 | 61°F | 44°F | 77°F 1909 | 31°F 1924 | 54% | 0% |
| Oct 12 | 61°F | 44°F | 78°F 1991 | 30°F 1912 | 55% | 0% |
| Oct 13 | 61°F | 44°F | 75°F 1961 | 30°F 1900 | 56% | 0% |
| Oct 14 | 60°F | 43°F | 80°F 1961 | 30°F 1952 | 56% | 0% |
| Oct 15 | 60°F | 43°F | 75°F 1914 | 30°F 1930 | 57% | 0% |
| Oct 16 | 60°F | 43°F | 81°F 1929 | 28°F 1930 | 58% | 0% |
| Oct 17 | 59°F | 43°F | 81°F 2022 | 28°F 1917 | 58% | 0% |
| Oct 18 | 59°F | 43°F | 80°F 2022 | 26°F 1905 | 59% | 0% |
| Oct 19 | 59°F | 43°F | 74°F 2023 | 25°F 1949 | 60% | 0% |
| Oct 20 | 58°F | 42°F | 77°F 1901 | 25°F 1949 | 60% | 0% |
| Oct 21 | 58°F | 42°F | 81°F 1901 | 29°F 1905 | 61% | 0% |
| Oct 22 | 58°F | 42°F | 83°F 1937 | 28°F 1916 | 61% | 0% |
| Oct 23 | 57°F | 42°F | 74°F 1901 | 27°F 1919 | 62% | 0% |
| Oct 24 | 57°F | 42°F | 78°F 1901 | 28°F 1954 | 62% | 0% |
| Oct 25 | 57°F | 42°F | 70°F 1903 | 24°F 1919 | 63% | 0% |
| Oct 26 | 56°F | 42°F | 79°F 1944 | 26°F 1919 | 63% | 0% |
| Oct 27 | 56°F | 41°F | 78°F 1944 | 28°F 1946 | 64% | 0% |
| Oct 28 | 56°F | 41°F | 76°F 1944 | 25°F 1971 | 64% | 0% |
| Oct 29 | 55°F | 41°F | 75°F 1944 | 25°F 1991 | 65% | 0% |
| Oct 30 | 55°F | 41°F | 76°F 1958 | 20°F 1935 | 65% | 0% |
| Oct 31 | 55°F | 41°F | 71°F 1897 | 20°F 1935 | 66% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- October 1
- sunrise 7:09 AM, sunset 6:48 PM
- October 31
- sunrise 7:54 AM, sunset 5:51 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00457507 (Sedro-Woolley), public domain. Records: NOAA GHCN-Daily, station USC00457507, 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.