Potomac Weather in March
Average highs run from 50°F on March 1 to 61°F on March 31, and lows from 30°F to 38°F. Normal precipitation for the month is 4.15 in over about 12 wet days.
March day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
March at a glance
- Average high
- 55°F
- Average low
- 34°F
- Precipitation
- 4.15 in
- Snowfall
- 0.7 in
- Record high
- 89°FMar 30, 1986
- Record low
- 1°FMar 21, 1914
- Chance of a freeze
- 100%
- Daylight
- 11 h 21 min to 12 h 37 min
- Cloud cover
- 63%
- Humidity
- 79%
- Dew point
- 35°F
- Wind
- 10.7 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 |
|---|---|---|---|---|---|---|
| Mar 1 | 50°F | 30°F | 80°F 1972 | 7°F 1980 | 34% | 3% |
| Mar 2 | 50°F | 30°F | 79°F 1972 | 7°F 1980 | 35% | 3% |
| Mar 3 | 50°F | 30°F | 75°F 1972 | 5°F 1980 | 35% | 3% |
| Mar 4 | 50°F | 31°F | 81°F 1974 | 6°F 1980 | 35% | 3% |
| Mar 5 | 51°F | 31°F | 83°F 1976 | 13°F 2002 | 35% | 3% |
| Mar 6 | 51°F | 31°F | 76°F 1918 | 12°F 1920 | 35% | 3% |
| Mar 7 | 51°F | 31°F | 77°F 1974 | 7°F 1978 | 35% | 2% |
| Mar 8 | 52°F | 31°F | 83°F 2000 | 9°F 1986 | 35% | 2% |
| Mar 9 | 52°F | 32°F | 80°F 2000 | 11°F 1996 | 35% | 2% |
| Mar 10 | 52°F | 32°F | 80°F 1986 | 10°F 1996 | 35% | 2% |
| Mar 11 | 53°F | 32°F | 75°F 1967 | 12°F 1960 | 36% | 2% |
| Mar 12 | 53°F | 32°F | 84°F 1990 | 13°F 1969 | 36% | 2% |
| Mar 13 | 53°F | 33°F | 82°F 1990 | 8°F 1914 | 36% | 2% |
| Mar 14 | 54°F | 33°F | 82°F 1990 | 15°F 1968 | 36% | 2% |
| Mar 15 | 54°F | 33°F | 81°F 2002 | 8°F 1993 | 36% | 2% |
| Mar 16 | 55°F | 33°F | 78°F 1990 | 12°F 1979 | 36% | 2% |
| Mar 17 | 55°F | 34°F | 77°F 1963 | 16°F 1969 | 36% | 2% |
| Mar 18 | 55°F | 34°F | 78°F 1963 | 12°F 1916 | 36% | 2% |
| Mar 19 | 56°F | 34°F | 79°F 1986 | 7°F 1967 | 37% | 1% |
| Mar 20 | 56°F | 34°F | 82°F 1976 | 19°F 1981 | 37% | 1% |
| Mar 21 | 57°F | 35°F | 80°F 1952 | 1°F 1914 | 37% | 1% |
| Mar 22 | 57°F | 35°F | 84°F 1968 | 19°F 1988 | 37% | 1% |
| Mar 23 | 57°F | 35°F | 84°F 1968 | 19°F 2004 | 37% | 1% |
| Mar 24 | 58°F | 36°F | 78°F 1994 | 20°F 1983 | 37% | 1% |
| Mar 25 | 58°F | 36°F | 82°F 1910 | 19°F 1983 | 37% | 1% |
| Mar 26 | 59°F | 36°F | 80°F 1986 | 21°F 1974 | 37% | 1% |
| Mar 27 | 59°F | 37°F | 81°F 1908 | 16°F 1915 | 37% | 1% |
| Mar 28 | 60°F | 37°F | 87°F 1985 | 18°F 1915 | 37% | 1% |
| Mar 29 | 60°F | 37°F | 84°F 1977 | 18°F 1982 | 38% | 1% |
| Mar 30 | 61°F | 38°F | 89°F 1986 | 22°F 1915 | 38% | 1% |
| Mar 31 | 61°F | 38°F | 87°F 1979 | 18°F 1915 | 38% | 1% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (EDT).
- March 1
- sunrise 6:41 AM, sunset 6:02 PM
- March 31
- sunrise 6:55 AM, sunset 7:32 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.