March weather in Potomac, IL
The average temperature in Potomac in March is 40.7°F (30.9°F–50.4°F). Average precipitation: 2.82 inches. Average snowfall is 2.2 inches.
March is a spring month in Potomac, and is cooler than the annual average of 52.3°F. Daily temperatures swing about 19.5°F between overnight low and afternoon high. Expect about 9 days with precipitation. Daylight averages about 11h 44m. For travel, March is cool.
Avg High
50.4°F
Avg Low
30.9°F
Precipitation
2.82 in
Snow
2.2 in
March records in Potomac
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| March 1 | 69.1°F (1992) | -2.9°F (1960) | 0.82 in (2018) |
| March 2 | 72.0°F (1992) | -4.0°F (1925) | 1.17 in (1906) |
| March 3 | 73.0°F (1974) | -2.9°F (2014) | 1.41 in (2023) |
| March 4 | 75.9°F (1983) | -4.0°F (2019) | 1.75 in (1963) |
| March 5 | 75.0°F (1983) | -6.0°F (1960) | 0.84 in (1976) |
| March 6 | 78.1°F (2026) | -5.1°F (1960) | 1.05 in (1945) |
| March 7 | 79.0°F (2000) | -4.0°F (1943) | 1.34 in (1995) |
| March 8 | 77.0°F (2000) | -9.9°F (1943) | 1.23 in (1942) |
| March 9 | 70.0°F (1974) | 1.0°F (1984) | 1.06 in (2019) |
| March 10 | 75.0°F (2026) | 3.0°F (1934) | 0.92 in (1997) |
| March 11 | 75.9°F (1972) | 3.9°F (1934) | 3.95 in (1990) |
| March 12 | 77.0°F (1990) | -7.1°F (1948) | 2.16 in (1939) |
| March 13 | 77.0°F (2007) | 5.0°F (1948) | 2.13 in (1917) |
| March 14 | 80.1°F (2012) | 8.1°F (1950) | 1.31 in (1946) |
| March 15 | 81.0°F (2012) | 12.9°F (1932) | 1.44 in (1919) |
| March 16 | 80.1°F (1945) | 8.1°F (1911) | 2.16 in (1942) |
| March 17 | 79.0°F (2012) | 1.0°F (1906) | 1.52 in (1980) |
| March 18 | 81.0°F (2012) | 3.9°F (1941) | 1.84 in (2021) |
| March 19 | 82.0°F (2012) | 1.0°F (1934) | 1.20 in (1906) |
| March 20 | 82.9°F (2012) | 8.1°F (1965) | 1.99 in (1927) |
| March 21 | 84.0°F (2012) | 8.1°F (1960) | 1.31 in (1962) |
| March 22 | 84.0°F (1907) | 5.0°F (1906) | 1.88 in (2007) |
| March 23 | 82.0°F (1907) | 10.0°F (1940) | 2.10 in (1913) |
| March 24 | 86.0°F (1910) | 5.0°F (1974) | 1.32 in (1913) |
| March 25 | 80.1°F (1939) | 3.0°F (1974) | 2.00 in (1904) |
| March 26 | 86.0°F (2026) | 7.0°F (2002) | 1.09 in (1970) |
| March 27 | 82.0°F (1910) | 9.0°F (1965) | 1.77 in (1998) |
| March 28 | 82.9°F (1910) | 1.9°F (1934) | 1.52 in (2004) |
| March 29 | 93.0°F (1905) | 16.0°F (1915) | 1.75 in (1924) |
| March 30 | 82.0°F (1986) | 16.0°F (1964) | 1.55 in (1922) |
| March 31 | 84.0°F (1981) | 12.0°F (1923) | 1.33 in (1922) |