January weather in Roslyn, WA
The average temperature in Roslyn in January is 30.0°F (24.6°F–35.5°F). Average precipitation: 8.13 inches.
January is a winter month in Roslyn, and is cooler than the annual average of 45.2°F. Daily temperatures swing about 10.9°F between overnight low and afternoon high. Daylight averages about 8h 41m. For travel, January is a wet month.
Avg High
35.5°F
Avg Low
24.6°F
Precipitation
8.13 in
Daylight
8h 41m
January records in Roslyn
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 45.0°F (2014) | -0.9°F (2011) | 1.50 in (2009) |
| January 2 | 42.1°F (1935) | 1.9°F (2011) | 2.00 in (1951) |
| January 3 | 48.0°F (2014) | -2.0°F (2011) | 2.40 in (1907) |
| January 4 | 44.1°F (1934) | 3.9°F (2011) | 1.32 in (2007) |
| January 5 | 46.0°F (2015) | -9.0°F (2004) | 2.55 in (2015) |
| January 6 | 48.0°F (2014) | -4.0°F (2004) | 5.00 in (1911) |
| January 7 | 48.0°F (2009) | -9.9°F (1907) | 8.75 in (1911) |
| January 8 | 46.0°F (1933) | -9.9°F (1907) | 2.01 in (1933) |
| January 9 | 46.9°F (2012) | -2.0°F (1907) | 7.00 in (1911) |
| January 10 | 45.0°F (1932) | -5.1°F (1907) | 10.00 in (1911) |
| January 11 | 44.1°F (2009) | 0.0°F (2007) | 6.00 in (1911) |
| January 12 | 46.0°F (2009) | 0.0°F (2017) | 4.00 in (1911) |
| January 13 | 48.0°F (1933) | -6.0°F (2024) | 1.44 in (1951) |
| January 14 | 52.0°F (2009) | -9.0°F (2024) | 0.55 in (2011) |
| January 15 | 46.9°F (2011) | -15.0°F (1907) | 1.00 in (1906) |
| January 16 | 48.0°F (2011) | -14.1°F (1907) | 2.27 in (2011) |
| January 17 | 50.0°F (2011) | -8.0°F (1907) | 1.83 in (2012) |
| January 18 | 50.0°F (2011) | 6.1°F (1907) | 23.00 in (1911) |
| January 19 | 50.0°F (2011) | 0.0°F (1935) | 17.00 in (1911) |
| January 20 | 48.0°F (2005) | -14.1°F (1935) | 6.00 in (1911) |
| January 21 | 48.0°F (2005) | -2.9°F (1935) | 3.75 in (1911) |
| January 22 | 43.0°F (1934) | 0.0°F (1935) | 2.36 in (1935) |
| January 23 | 50.0°F (1935) | -2.0°F (2008) | 2.50 in (1935) |
| January 24 | 48.9°F (1935) | -0.9°F (2008) | 2.00 in (1907) |
| January 25 | 46.9°F (2019) | -0.9°F (2008) | 3.75 in (1911) |
| January 26 | 48.0°F (2015) | -0.9°F (2008) | 1.55 in (2003) |
| January 27 | 51.1°F (2003) | 0.0°F (2007) | 0.73 in (2018) |
| January 28 | 48.0°F (2011) | 6.1°F (2007) | 0.52 in (2008) |
| January 29 | 46.9°F (2003) | 1.9°F (2007) | 2.75 in (1911) |
| January 30 | 46.9°F (1935) | 6.1°F (2023) | 1.90 in (2003) |
| January 31 | 48.9°F (2005) | 7.0°F (1932) | 2.65 in (2003) |