January weather in Black Diamond, WA
The average temperature in Black Diamond in January is 39.3°F (33.0°F–45.7°F). Average precipitation: 7.99 inches.
January is a winter month in Black Diamond, and is cooler than the annual average of 50.5°F. Daily temperatures swing about 12.7°F between overnight low and afternoon high. Expect about 20 days with precipitation. Daylight averages about 8h 40m. For travel, January is a wet month.
Avg High
45.7°F
Avg Low
33.0°F
Precipitation
7.99 in
Daylight
8h 40m
January records in Black Diamond
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 55.0°F (1918) | 3.9°F (1979) | 1.99 in (1964) |
| January 2 | 63.0°F (2007) | 10.9°F (1959) | 2.03 in (1913) |
| January 3 | 62.1°F (2020) | 7.0°F (1950) | 1.96 in (1913) |
| January 4 | 60.1°F (2020) | 9.0°F (1959) | 1.92 in (1983) |
| January 5 | 57.0°F (1954) | 12.0°F (1974) | 2.32 in (1926) |
| January 6 | 55.0°F (2006) | 9.0°F (1937) | 1.90 in (2020) |
| January 7 | 55.9°F (1961) | 10.0°F (1937) | 2.76 in (2009) |
| January 8 | 55.9°F (1928) | 7.0°F (1937) | 2.18 in (1971) |
| January 9 | 60.1°F (1940) | 12.0°F (1930) | 1.95 in (1990) |
| January 10 | 64.9°F (1941) | 8.1°F (1949) | 1.88 in (2006) |
| January 11 | 62.1°F (1941) | 8.1°F (1930) | 2.00 in (1932) |
| January 12 | 57.0°F (1941) | 7.0°F (1930) | 2.32 in (2021) |
| January 13 | 57.9°F (2019) | 9.0°F (1930) | 2.21 in (1975) |
| January 14 | 57.0°F (2018) | 6.1°F (1950) | 2.14 in (1938) |
| January 15 | 62.1°F (2018) | 9.0°F (1950) | 1.41 in (1976) |
| January 16 | 57.0°F (1971) | 12.9°F (1930) | 1.73 in (1958) |
| January 17 | 57.0°F (1921) | 10.9°F (1943) | 2.08 in (2005) |
| January 18 | 59.0°F (2009) | 1.0°F (1950) | 2.12 in (1986) |
| January 19 | 61.0°F (1961) | 5.0°F (1937) | 2.05 in (1934) |
| January 20 | 66.0°F (1961) | 5.0°F (1937) | 2.22 in (1972) |
| January 21 | 66.9°F (1961) | 9.0°F (1930) | 1.93 in (2011) |
| January 22 | 62.1°F (1931) | 7.0°F (1943) | 3.34 in (1919) |
| January 23 | 57.9°F (1921) | 9.0°F (1929) | 1.78 in (1982) |
| January 24 | 57.9°F (1947) | 6.1°F (1957) | 2.80 in (1984) |
| January 25 | 57.9°F (1942) | 1.9°F (1950) | 1.75 in (1920) |
| January 26 | 60.1°F (1935) | 1.9°F (1957) | 3.20 in (2002) |
| January 27 | 61.0°F (1935) | 1.9°F (1957) | 1.67 in (1967) |
| January 28 | 66.0°F (1940) | 6.1°F (1972) | 1.42 in (1965) |
| January 29 | 63.0°F (1940) | 1.0°F (1950) | 2.10 in (2012) |
| January 30 | 64.9°F (1940) | 1.9°F (1950) | 1.15 in (1952) |
| January 31 | 68.0°F (1935) | 1.0°F (1950) | 1.53 in (1987) |