Potomac Weather in January
Average highs run from 34°F on January 1 to 34°F on January 31, and lows from 20°F to 18°F. Normal precipitation for the month is 2.12 in over about 9 wet days.
January day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
January at a glance
- Average high
- 34°F
- Average low
- 18°F
- Precipitation
- 2.12 in
- Snowfall
- 6.5 in
- Record high
- 70°FJan 25, 1950
- Record low
- -26°FJan 17, 1982
- Chance of a freeze
- 100%
- Daylight
- 9 h 22 min to 10 h 08 min
- Cloud cover
- 69%
- Humidity
- 86%
- Dew point
- 20°F
- Wind
- 12.3 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 |
|---|---|---|---|---|---|---|
| Jan 1 | 34°F | 20°F | 67°F 1897 | -18°F 1968 | 27% | 11% |
| Jan 2 | 34°F | 20°F | 68°F 1997 | -7°F 1929 | 27% | 11% |
| Jan 3 | 34°F | 20°F | 68°F 1997 | -12°F 1904 | 27% | 11% |
| Jan 4 | 34°F | 20°F | 65°F 1997 | -9°F 1896 | 27% | 12% |
| Jan 5 | 34°F | 20°F | 59°F 1955 | -24°F 1999 | 27% | 12% |
| Jan 6 | 34°F | 19°F | 62°F 1946 | -14°F 2014 | 27% | 12% |
| Jan 7 | 34°F | 19°F | 67°F 2008 | -18°F 1912 | 27% | 12% |
| Jan 8 | 33°F | 19°F | 62°F 1965 | -16°F 1968 | 27% | 12% |
| Jan 9 | 33°F | 19°F | 65°F 2026 | -10°F 1940 | 28% | 12% |
| Jan 10 | 33°F | 19°F | 61°F 1975 | -19°F 1982 | 28% | 13% |
| Jan 11 | 33°F | 18°F | 60°F 1911 | -18°F 1977 | 28% | 13% |
| Jan 12 | 33°F | 18°F | 65°F 1995 | -21°F 1918 | 28% | 13% |
| Jan 13 | 33°F | 18°F | 63°F 1950 | -19°F 1912 | 28% | 13% |
| Jan 14 | 33°F | 18°F | 65°F 1928 | -9°F 1957 | 28% | 13% |
| Jan 15 | 33°F | 18°F | 66°F 1932 | -18°F 1927 | 28% | 13% |
| Jan 16 | 33°F | 18°F | 65°F 1990 | -22°F 1972 | 28% | 13% |
| Jan 17 | 33°F | 18°F | 68°F 1952 | -26°F 1982 | 28% | 13% |
| Jan 18 | 33°F | 18°F | 62°F 1996 | -22°F 1930 | 28% | 13% |
| Jan 19 | 33°F | 18°F | 59°F 1933 | -26°F 1994 | 28% | 14% |
| Jan 20 | 33°F | 18°F | 59°F 1951 | -19°F 1985 | 28% | 14% |
| Jan 21 | 33°F | 18°F | 63°F 2017 | -23°F 1924 | 28% | 14% |
| Jan 22 | 33°F | 18°F | 62°F 1933 | -15°F 1936 | 28% | 14% |
| Jan 23 | 33°F | 18°F | 65°F 1967 | -20°F 1936 | 28% | 14% |
| Jan 24 | 34°F | 18°F | 68°F 1950 | -21°F 1915 | 28% | 14% |
| Jan 25 | 34°F | 18°F | 70°F 1950 | -12°F 1963 | 28% | 14% |
| Jan 26 | 34°F | 18°F | 69°F 1950 | -12°F 1936 | 28% | 14% |
| Jan 27 | 34°F | 18°F | 64°F 1914 | -14°F 1904 | 28% | 14% |
| Jan 28 | 34°F | 18°F | 66°F 1914 | -25°F 1963 | 28% | 14% |
| Jan 29 | 34°F | 18°F | 62°F 1914 | -10°F 1972 | 28% | 14% |
| Jan 30 | 34°F | 18°F | 62°F 2013 | -17°F 1936 | 28% | 14% |
| Jan 31 | 34°F | 18°F | 66°F 1989 | -13°F 1963 | 28% | 14% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CST).
- January 1
- sunrise 7:14 AM, sunset 4:36 PM
- January 31
- sunrise 7:01 AM, sunset 5:09 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00114198 (Hoopeston), public domain. Records: NOAA GHCN-Daily, station USC00112140, 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.