January weather in Sumas, WA
The average temperature in Sumas in January is 37.8°F (32.1°F–43.5°F). Average precipitation: 6.98 inches. Average snowfall is 3.1 inches.
January is a winter month in Sumas, and is cooler than the annual average of 50.3°F. Daily temperatures swing about 11.4°F between overnight low and afternoon high. Expect about 18 days with precipitation. Daylight averages about 8h 27m. For travel, January is a wet month.
Avg High
43.5°F
Avg Low
32.1°F
Precipitation
6.98 in
Snow
3.1 in
January records in Sumas
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 55.0°F (1927) | 6.1°F (1952) | 1.29 in (1964) |
| January 2 | 57.9°F (2003) | 1.9°F (1950) | 1.73 in (1953) |
| January 3 | 60.1°F (2020) | 3.9°F (1950) | 2.53 in (2019) |
| January 4 | 59.0°F (1984) | 8.1°F (1950) | 1.99 in (1984) |
| January 5 | 55.0°F (1949) | 8.1°F (1982) | 2.02 in (1926) |
| January 6 | 55.0°F (2006) | 6.1°F (1982) | 1.59 in (2009) |
| January 7 | 61.0°F (2002) | 10.0°F (1930) | 2.17 in (1914) |
| January 8 | 62.1°F (1986) | 14.0°F (1930) | 1.94 in (1933) |
| January 9 | 57.9°F (1934) | 15.1°F (1980) | 1.30 in (1923) |
| January 10 | 64.9°F (1986) | 3.9°F (1911) | 1.87 in (2006) |
| January 11 | 62.1°F (1987) | 1.9°F (1911) | 1.76 in (1928) |
| January 12 | 59.0°F (1987) | 0.0°F (1911) | 1.95 in (2022) |
| January 13 | 59.0°F (1986) | -4.0°F (1911) | 1.66 in (2006) |
| January 14 | 57.9°F (1904) | 0.0°F (1911) | 1.75 in (1921) |
| January 15 | 59.0°F (1973) | 3.9°F (1907) | 1.50 in (1927) |
| January 16 | 57.9°F (1944) | 3.9°F (1907) | 1.55 in (1926) |
| January 17 | 55.9°F (1918) | 5.0°F (1943) | 2.30 in (2005) |
| January 18 | 57.9°F (1971) | 0.0°F (1950) | 1.62 in (2005) |
| January 19 | 64.0°F (2005) | 0.0°F (1935) | 2.35 in (1968) |
| January 20 | 60.1°F (1968) | 3.0°F (1937) | 1.22 in (2005) |
| January 21 | 55.9°F (1981) | -2.9°F (1943) | 2.87 in (1907) |
| January 22 | 61.0°F (1931) | 6.1°F (1943) | 1.15 in (1990) |
| January 23 | 59.0°F (1931) | 5.0°F (1943) | 1.97 in (1982) |
| January 24 | 57.0°F (2015) | 1.9°F (1950) | 7.77 in (1935) |
| January 25 | 57.9°F (2015) | -0.9°F (1950) | 1.58 in (1993) |
| January 26 | 60.1°F (2003) | 6.1°F (1950) | 1.92 in (1965) |
| January 27 | 57.0°F (1962) | 5.0°F (1969) | 2.75 in (1931) |
| January 28 | 60.1°F (1940) | 6.1°F (1929) | 2.20 in (2024) |
| January 29 | 59.0°F (1924) | 6.1°F (1929) | 1.66 in (2018) |
| January 30 | 66.0°F (2024) | 3.9°F (1917) | 2.05 in (1997) |
| January 31 | 62.1°F (1924) | 3.0°F (1917) | 2.50 in (2020) |