January weather in Allentown, PA
The average temperature in Allentown in January is 30.1°F (21.8°F–38.4°F). Average precipitation: 3.30 inches. Average snowfall is 9.8 inches.
January is a winter month in Allentown, and is cooler than the annual average of 53.1°F. Daily temperatures swing about 16.6°F between overnight low and afternoon high. Expect about 11 days with precipitation. Daylight averages about 9h 24m. For travel, January is cold.
Avg High
38.4°F
Avg Low
21.8°F
Precipitation
3.30 in
Snow
9.8 in
January records in Allentown
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 62.1°F (2005) | -2.9°F (1968) | 1.13 in (2007) |
| January 2 | 59.0°F (1979) | -7.1°F (1968) | 1.37 in (1979) |
| January 3 | 63.0°F (1997) | -2.7°F (2014) | 1.71 in (1999) |
| January 4 | 66.0°F (1950) | -4.0°F (1981) | 1.55 in (1982) |
| January 5 | 62.1°F (1993) | 1.2°F (2014) | 2.37 in (1949) |
| January 6 | 70.0°F (2007) | -4.0°F (1968) | 1.68 in (1962) |
| January 7 | 63.0°F (2008) | -0.8°F (2014) | 1.48 in (1979) |
| January 8 | 66.9°F (1998) | -0.9°F (1968) | 1.17 in (1996) |
| January 9 | 64.9°F (1998) | -5.1°F (1981) | 2.20 in (2024) |
| January 10 | 63.0°F (2016) | 0.0°F (1982) | 1.06 in (2016) |
| January 11 | 68.0°F (2020) | -7.1°F (1988) | 1.40 in (2014) |
| January 12 | 68.0°F (2020) | -6.0°F (1968) | 1.08 in (2018) |
| January 13 | 64.0°F (2005) | -2.9°F (1981) | 1.01 in (1964) |
| January 14 | 69.1°F (1995) | 1.0°F (1974) | 1.63 in (1968) |
| January 15 | 68.0°F (1995) | -6.0°F (1948) | 0.63 in (1999) |
| January 16 | 62.1°F (1995) | 0.0°F (1994) | 0.70 in (1991) |
| January 17 | 61.0°F (1990) | -8.0°F (1982) | 1.42 in (1994) |
| January 18 | 63.0°F (2006) | -9.9°F (1954) | 1.22 in (2006) |
| January 19 | 60.1°F (1949) | -11.0°F (1994) | 1.93 in (1996) |
| January 20 | 55.9°F (1951) | -6.0°F (1994) | 1.23 in (1978) |
| January 21 | 63.0°F (1959) | -15.0°F (1994) | 1.42 in (1979) |
| January 22 | 63.0°F (1959) | -11.9°F (1961) | 1.06 in (1987) |
| January 23 | 62.1°F (1999) | -9.0°F (1961) | 1.65 in (2016) |
| January 24 | 66.0°F (1967) | -6.0°F (1948) | 1.90 in (2019) |
| January 25 | 64.0°F (1967) | -4.0°F (1963) | 1.70 in (1978) |
| January 26 | 72.0°F (1950) | -2.9°F (1948) | 1.63 in (1976) |
| January 27 | 66.0°F (1974) | -5.1°F (1994) | 1.35 in (1976) |
| January 28 | 60.1°F (2002) | -6.0°F (1988) | 1.55 in (1994) |
| January 29 | 66.0°F (2002) | -9.0°F (1963) | 1.66 in (1990) |
| January 30 | 66.0°F (2013) | -0.9°F (2026) | 0.94 in (1966) |
| January 31 | 60.1°F (1974) | -9.0°F (1948) | 1.63 in (2013) |