January weather in Flagstaff, AZ
The average temperature in Flagstaff in January is 30.5°F (17.6°F–43.4°F). Average precipitation: 2.05 inches. Average snowfall is 20.9 inches.
January is a winter month in Flagstaff, and is cooler than the annual average of 46.8°F. Daily temperatures swing about 25.8°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 9h 53m. For travel, January is cold.
Avg High
43.4°F
Avg Low
17.6°F
Precipitation
2.05 in
Snow
20.9 in
January records in Flagstaff
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 61.0°F (1981) | -18.9°F (2011) | 1.63 in (2023) |
| January 2 | 63.0°F (2025) | -13.0°F (1937) | 0.49 in (1990) |
| January 3 | 60.1°F (1994) | -18.9°F (1937) | 1.23 in (2005) |
| January 4 | 64.0°F (1927) | -22.0°F (1971) | 1.57 in (2005) |
| January 5 | 59.0°F (1927) | -20.0°F (1971) | 1.15 in (1974) |
| January 6 | 64.9°F (1898) | -9.0°F (1894) | 1.23 in (1965) |
| January 7 | 64.0°F (1898) | -18.9°F (1894) | 1.42 in (1993) |
| January 8 | 64.0°F (1898) | -11.9°F (1989) | 1.65 in (1993) |
| January 9 | 64.9°F (1898) | -9.0°F (1937) | 1.05 in (2018) |
| January 10 | 64.9°F (1990) | -15.0°F (1937) | 0.80 in (1898) |
| January 11 | 63.0°F (1990) | -17.0°F (1963) | 1.20 in (1898) |
| January 12 | 59.0°F (2002) | -20.0°F (1963) | 1.00 in (2001) |
| January 13 | 59.0°F (1938) | -7.1°F (2013) | 1.12 in (1997) |
| January 14 | 64.9°F (1943) | -15.0°F (2007) | 0.76 in (2017) |
| January 15 | 64.9°F (1943) | -11.9°F (1937) | 2.40 in (1895) |
| January 16 | 60.1°F (1971) | -6.0°F (1987) | 2.80 in (1895) |
| January 17 | 62.1°F (1971) | -13.0°F (1987) | 1.83 in (1979) |
| January 18 | 64.0°F (1971) | -8.0°F (1995) | 1.73 in (1952) |
| January 19 | 62.1°F (1986) | -13.0°F (1943) | 1.40 in (1895) |
| January 20 | 61.0°F (1950) | -9.9°F (1935) | 0.71 in (2017) |
| January 21 | 57.9°F (1950) | -24.0°F (1937) | 3.39 in (2010) |
| January 22 | 62.1°F (1970) | -29.9°F (1937) | 0.81 in (2010) |
| January 23 | 61.0°F (1970) | -15.0°F (1937) | 1.23 in (1943) |
| January 24 | 61.0°F (1982) | -15.0°F (1964) | 0.69 in (1965) |
| January 25 | 61.0°F (1975) | -22.0°F (1898) | 1.30 in (1969) |
| January 26 | 60.1°F (1987) | -15.0°F (1937) | 1.55 in (2013) |
| January 27 | 61.0°F (2003) | -13.0°F (1979) | 1.28 in (2008) |
| January 28 | 63.0°F (1986) | -9.9°F (1932) | 0.40 in (1895) |
| January 29 | 60.1°F (1986) | -11.9°F (1932) | 1.48 in (1980) |
| January 30 | 66.0°F (1971) | -18.9°F (1979) | 0.78 in (2015) |
| January 31 | 63.0°F (1971) | -16.1°F (1985) | 1.20 in (1893) |