January weather in Herndon, VA
The average temperature in Herndon in January is 33.9°F (25.2°F–42.6°F). Average precipitation: 2.94 inches. Average snowfall is 6.9 inches.
January is a winter month in Herndon, and is cooler than the annual average of 55.7°F. Daily temperatures swing about 17.4°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 9h 33m. For travel, January is cold.
Avg High
42.6°F
Avg Low
25.2°F
Precipitation
2.94 in
Snow
6.9 in
January records in Herndon
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 68.0°F (2005) | -6.0°F (1968) | 1.73 in (2003) |
| January 2 | 66.9°F (2000) | -7.1°F (1968) | 1.40 in (1979) |
| January 3 | 69.1°F (2023) | 1.2°F (2018) | 1.37 in (1999) |
| January 4 | 73.9°F (1997) | 5.0°F (1979) | 0.89 in (1992) |
| January 5 | 69.1°F (1997) | 5.0°F (1970) | 1.11 in (1993) |
| January 6 | 71.1°F (2007) | 3.9°F (1977) | 0.97 in (2024) |
| January 7 | 71.1°F (2008) | -0.8°F (2018) | 1.56 in (1996) |
| January 8 | 70.0°F (2008) | -4.0°F (1970) | 1.07 in (1978) |
| January 9 | 64.0°F (2008) | -8.0°F (1970) | 1.76 in (2024) |
| January 10 | 59.0°F (2016) | 0.0°F (1982) | 1.21 in (2026) |
| January 11 | 71.1°F (1975) | -5.1°F (1988) | 0.90 in (1991) |
| January 12 | 70.0°F (2017) | -4.0°F (1977) | 0.91 in (2018) |
| January 13 | 69.1°F (2005) | -2.9°F (1977) | 1.03 in (1964) |
| January 14 | 72.0°F (1995) | 5.0°F (1970) | 1.79 in (2005) |
| January 15 | 68.0°F (2007) | -7.1°F (1964) | 1.56 in (1995) |
| January 16 | 64.9°F (1974) | -4.0°F (1964) | 1.12 in (2022) |
| January 17 | 70.0°F (1990) | -7.1°F (1982) | 1.14 in (1994) |
| January 18 | 70.0°F (1990) | -0.9°F (1994) | 1.18 in (1980) |
| January 19 | 64.9°F (1972) | -6.0°F (1994) | 1.36 in (1987) |
| January 20 | 63.0°F (2006) | -7.1°F (1985) | 1.01 in (1979) |
| January 21 | 63.0°F (2018) | -16.1°F (1984) | 0.94 in (1974) |
| January 22 | 68.0°F (1986) | -18.0°F (1984) | 1.18 in (1987) |
| January 23 | 72.0°F (1967) | -4.0°F (1970) | 1.88 in (2016) |
| January 24 | 73.0°F (1967) | -2.0°F (1987) | 1.33 in (2019) |
| January 25 | 73.0°F (1967) | -5.1°F (1987) | 1.84 in (2026) |
| January 26 | 79.0°F (2024) | 3.0°F (1987) | 1.31 in (2011) |
| January 27 | 71.1°F (1974) | -9.0°F (1987) | 0.95 in (1976) |
| January 28 | 68.0°F (2002) | -17.0°F (1987) | 1.64 in (1998) |
| January 29 | 75.0°F (1975) | -0.9°F (1963) | 0.95 in (1990) |
| January 30 | 72.0°F (2013) | 1.9°F (1965) | 2.00 in (2013) |
| January 31 | 66.0°F (2012) | -7.1°F (1965) | 0.84 in (2025) |