Potomac Weather in October
Average highs run from 74°F on October 1 to 62°F on October 31, and lows from 53°F to 41°F. Normal precipitation for the month is 4.40 in over about 9 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
- 68°F
- Average low
- 47°F
- Precipitation
- 4.40 in
- Record high
- 93°FOct 3, 1919
- Record low
- 20°FOct 21, 1917
- Chance of a freeze
- 50%
- Daylight
- 11 h 46 min to 10 h 34 min
- Cloud cover
- 54%
- Humidity
- 75%
- Dew point
- 49°F
- Wind
- 8.7 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 | 74°F | 53°F | 87°F 1986 | 32°F 1916 | 32% | 0% |
| Oct 2 | 74°F | 53°F | 86°F 1986 | 30°F 1916 | 32% | 0% |
| Oct 3 | 73°F | 52°F | 93°F 1919 | 25°F 1974 | 32% | 0% |
| Oct 4 | 73°F | 52°F | 93°F 1919 | 21°F 1974 | 31% | 0% |
| Oct 5 | 72°F | 51°F | 89°F 1959 | 31°F 1970 | 31% | 0% |
| Oct 6 | 72°F | 51°F | 90°F 1951 | 34°F 1965 | 31% | 0% |
| Oct 7 | 72°F | 51°F | 86°F 1959 | 25°F 1917 | 31% | 0% |
| Oct 8 | 71°F | 50°F | 90°F 1916 | 31°F 1918 | 31% | 0% |
| Oct 9 | 71°F | 50°F | 88°F 1916 | 25°F 1978 | 31% | 0% |
| Oct 10 | 70°F | 49°F | 91°F 1919 | 24°F 1979 | 31% | 0% |
| Oct 11 | 70°F | 49°F | 93°F 1919 | 24°F 1979 | 31% | 0% |
| Oct 12 | 70°F | 48°F | 90°F 1954 | 31°F 1916 | 31% | 0% |
| Oct 13 | 69°F | 48°F | 89°F 1954 | 25°F 1917 | 31% | 0% |
| Oct 14 | 69°F | 48°F | 87°F 1954 | 25°F 1917 | 31% | 0% |
| Oct 15 | 68°F | 47°F | 86°F 1920 | 26°F 1979 | 31% | 0% |
| Oct 16 | 68°F | 47°F | 85°F 1920 | 33°F 1986 | 31% | 0% |
| Oct 17 | 68°F | 46°F | 84°F 1958 | 28°F 1978 | 31% | 0% |
| Oct 18 | 67°F | 46°F | 82°F 1963 | 25°F 1977 | 31% | 0% |
| Oct 19 | 67°F | 45°F | 81°F 1963 | 25°F 1976 | 31% | 0% |
| Oct 20 | 66°F | 45°F | 81°F 1963 | 22°F 1974 | 31% | 0% |
| Oct 21 | 66°F | 45°F | 85°F 1979 | 20°F 1917 | 31% | 0% |
| Oct 22 | 66°F | 44°F | 84°F 1920 | 20°F 1974 | 31% | 0% |
| Oct 23 | 65°F | 44°F | 81°F 1975 | 26°F 1918 | 31% | 0% |
| Oct 24 | 65°F | 44°F | 81°F 1975 | 28°F 1915 | 31% | 0% |
| Oct 25 | 65°F | 43°F | 81°F 1952 | 28°F 1915 | 30% | 0% |
| Oct 26 | 64°F | 43°F | 81°F 1984 | 26°F 1917 | 30% | 0% |
| Oct 27 | 64°F | 42°F | 84°F 1984 | 23°F 1979 | 30% | 0% |
| Oct 28 | 63°F | 42°F | 85°F 1984 | 20°F 1976 | 30% | 0% |
| Oct 29 | 63°F | 42°F | 81°F 1918 | 24°F 1982 | 30% | 0% |
| Oct 30 | 63°F | 41°F | 80°F 1950 | 27°F 1910 | 30% | 0% |
| Oct 31 | 62°F | 41°F | 82°F 1950 | 21°F 1917 | 31% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- October 1
- sunrise 7:05 AM, sunset 6:51 PM
- October 31
- sunrise 7:35 AM, sunset 6:09 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00182325 (Dalecarlia Rsvr), public domain. Records: NOAA GHCN-Daily, station USC00187705, 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.