Washington County Weather in January
Average highs run from 43°F on January 1 to 47°F on January 31, and lows from 32°F to 33°F. Normal precipitation for the month is 7.19 in over about 19 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
- 45°F
- Average low
- 33°F
- Precipitation
- 7.19 in
- Snowfall
- 0.6 in
- Record high
- 64°FJan 18, 2005
- Record low
- 3°FJan 13, 2017
- Chance of a freeze
- 100%
- Daylight
- 8 h 47 min to 9 h 44 min
- Cloud cover
- 76%
- Humidity
- 94%
- Dew point
- 37°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 | 43°F | 32°F | 53°F 2020 | 21°F 2015 | 62% | 1% |
| Jan 2 | 43°F | 32°F | 63°F 2025 | 23°F 2011 | 62% | 1% |
| Jan 3 | 43°F | 32°F | 58°F 2020 | 20°F 2011 | 62% | 1% |
| Jan 4 | 44°F | 32°F | 58°F 2003 | 21°F 2017 | 62% | 1% |
| Jan 5 | 44°F | 32°F | 59°F 2023 | 15°F 2017 | 62% | 1% |
| Jan 6 | 44°F | 32°F | 58°F 2002 | 13°F 2017 | 62% | 1% |
| Jan 7 | 44°F | 32°F | 58°F 2002 | 19°F 2017 | 62% | 1% |
| Jan 8 | 44°F | 33°F | 54°F 2002 | 26°F 2003 | 62% | 1% |
| Jan 9 | 44°F | 33°F | 54°F 2022 | 26°F 2022 | 62% | 1% |
| Jan 10 | 44°F | 33°F | 56°F 2006 | 26°F 2012 | 62% | 1% |
| Jan 11 | 44°F | 33°F | 58°F 2018 | 22°F 2005 | 61% | 1% |
| Jan 12 | 44°F | 33°F | 61°F 2022 | 9°F 2017 | 61% | 1% |
| Jan 13 | 45°F | 33°F | 60°F 2018 | 3°F 2017 | 61% | 1% |
| Jan 14 | 45°F | 33°F | 59°F 2018 | 4°F 2017 | 61% | 1% |
| Jan 15 | 45°F | 33°F | 59°F 2026 | 6°F 2017 | 60% | 1% |
| Jan 16 | 45°F | 33°F | 57°F 2011 | 13°F 2024 | 60% | 1% |
| Jan 17 | 45°F | 33°F | 58°F 2015 | 23°F 2001 | 60% | 1% |
| Jan 18 | 45°F | 33°F | 64°F 2005 | 24°F 2025 | 60% | 1% |
| Jan 19 | 45°F | 33°F | 60°F 2005 | 22°F 2025 | 59% | 1% |
| Jan 20 | 46°F | 33°F | 58°F 2022 | 23°F 2009 | 59% | 1% |
| Jan 21 | 46°F | 33°F | 56°F 2010 | 21°F 2009 | 59% | 1% |
| Jan 22 | 46°F | 33°F | 56°F 2016 | 19°F 2008 | 59% | 1% |
| Jan 23 | 46°F | 33°F | 58°F 2003 | 20°F 2008 | 59% | 1% |
| Jan 24 | 46°F | 33°F | 60°F 2015 | 19°F 2008 | 59% | 1% |
| Jan 25 | 46°F | 33°F | 59°F 2003 | 19°F 2008 | 59% | 1% |
| Jan 26 | 46°F | 33°F | 61°F 2003 | 22°F 2008 | 58% | 1% |
| Jan 27 | 47°F | 33°F | 62°F 2024 | 22°F 2025 | 58% | 1% |
| Jan 28 | 47°F | 33°F | 64°F 2024 | 21°F 2001 | 58% | 1% |
| Jan 29 | 47°F | 33°F | 58°F 2024 | 21°F 2022 | 58% | 1% |
| Jan 30 | 47°F | 33°F | 57°F 2003 | 18°F 2023 | 58% | 0% |
| Jan 31 | 47°F | 33°F | 60°F 2020 | 22°F 2023 | 57% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PST).
- January 1
- sunrise 7:53 AM, sunset 4:40 PM
- January 31
- sunrise 7:34 AM, sunset 5:18 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00352997 (Forest Grove), public domain. Records: NOAA GHCN-Daily, station USW00094261, 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.