Sumas Weather in January
Average highs run from 42°F on January 1 to 45°F on January 31, and lows from 31°F to 33°F. Normal precipitation for the month is 6.98 in over about 18 wet days.
January day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
January at a glance
- Average high
- 44°F
- Average low
- 32°F
- Precipitation
- 6.98 in
- Snowfall
- 3.1 in
- Record high
- 69°FJan 29, 2024
- Record low
- -2°FJan 25, 1950
- Chance of a freeze
- 100%
- Daylight
- 8 h 20 min to 9 h 24 min
- Cloud cover
- 77%
- Humidity
- 91%
- Dew point
- 33°F
- Wind
- 5.6 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Jan 1 | 42°F | 31°F | 57°F 2021 | 8°F 2022 | 60% | 6% |
| Jan 2 | 42°F | 31°F | 59°F 2012 | 4°F 1950 | 60% | 6% |
| Jan 3 | 42°F | 32°F | 61°F 2020 | 6°F 1950 | 60% | 6% |
| Jan 4 | 42°F | 32°F | 60°F 2012 | 5°F 1950 | 60% | 6% |
| Jan 5 | 42°F | 32°F | 61°F 2006 | 2°F 1982 | 60% | 6% |
| Jan 6 | 42°F | 32°F | 58°F 2002 | 1°F 1982 | 60% | 6% |
| Jan 7 | 42°F | 32°F | 62°F 1986 | 13°F 1979 | 60% | 6% |
| Jan 8 | 42°F | 32°F | 59°F 1986 | 14°F 1979 | 60% | 6% |
| Jan 9 | 43°F | 32°F | 61°F 1986 | 16°F 1949 | 59% | 6% |
| Jan 10 | 43°F | 32°F | 63°F 1986 | 12°F 1980 | 59% | 6% |
| Jan 11 | 43°F | 32°F | 65°F 2010 | 9°F 2024 | 59% | 6% |
| Jan 12 | 43°F | 32°F | 60°F 2021 | 3°F 2024 | 59% | 6% |
| Jan 13 | 43°F | 32°F | 64°F 1968 | 7°F 2024 | 59% | 6% |
| Jan 14 | 43°F | 32°F | 62°F 1968 | 10°F 2007 | 59% | 6% |
| Jan 15 | 43°F | 32°F | 58°F 1974 | 9°F 1950 | 58% | 6% |
| Jan 16 | 43°F | 32°F | 58°F 1958 | 9°F 1950 | 58% | 6% |
| Jan 17 | 44°F | 32°F | 62°F 2018 | 7°F 1950 | 58% | 5% |
| Jan 18 | 44°F | 32°F | 58°F 2005 | 4°F 1950 | 58% | 5% |
| Jan 19 | 44°F | 32°F | 63°F 2005 | 11°F 1954 | 58% | 5% |
| Jan 20 | 44°F | 32°F | 61°F 1981 | 13°F 1954 | 58% | 5% |
| Jan 21 | 44°F | 32°F | 64°F 1981 | 13°F 1957 | 58% | 5% |
| Jan 22 | 44°F | 32°F | 65°F 1981 | 11°F 1969 | 58% | 5% |
| Jan 23 | 44°F | 33°F | 60°F 2005 | 9°F 1969 | 58% | 5% |
| Jan 24 | 45°F | 33°F | 56°F 2015 | 4°F 1950 | 58% | 5% |
| Jan 25 | 45°F | 33°F | 59°F 2015 | -2°F 1950 | 58% | 5% |
| Jan 26 | 45°F | 33°F | 60°F 2015 | 10°F 1957 | 58% | 5% |
| Jan 27 | 45°F | 33°F | 61°F 2016 | 8°F 1957 | 58% | 5% |
| Jan 28 | 45°F | 33°F | 62°F 2024 | 4°F 1950 | 58% | 5% |
| Jan 29 | 45°F | 33°F | 69°F 2024 | -2°F 1950 | 57% | 5% |
| Jan 30 | 45°F | 33°F | 60°F 1992 | 9°F 1950 | 57% | 5% |
| Jan 31 | 45°F | 33°F | 60°F 1992 | 0°F 1950 | 57% | 5% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- January 1
- sunrise 8:03 AM, sunset 4:23 PM
- January 31
- sunrise 7:41 AM, sunset 5:05 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00451484 (Clearbrook), public domain. Records: NOAA GHCN-Daily, station USW00024217, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.