Osan Weather in January
Average highs run from 2°C on January 1 to 2°C on January 31, and lows from -4°C to -5°C. Normal precipitation for the month is 22 mm over about 3 wet days.
January day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
January at a glance
- Average high
- 2°C
- Average low
- -5°C
- Precipitation
- 22 mm
- Reanalysis high
- 13°CJan 15, 2002
- Reanalysis low
- -15°CJan 26, 2018
- Daylight
- 9 h 40 min to 10 h 19 min
- Cloud cover
- 46%
- Humidity
- 76%
- Dew point
- -6°C
- Wind
- 16.2 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Reanalysis high | Reanalysis low | Chance wet |
|---|---|---|---|---|---|
| Jan 1 | 2°C | -4°C | 9°C 1997 | -9°C 2011 | 16% |
| Jan 2 | 2°C | -4°C | 9°C 2016 | -10°C 2013 | 16% |
| Jan 3 | 2°C | -4°C | 9°C 2016 | -13°C 2013 | 15% |
| Jan 4 | 2°C | -4°C | 8°C 2007 | -14°C 2013 | 14% |
| Jan 5 | 2°C | -4°C | 7°C 1999 | -11°C 2003 | 14% |
| Jan 6 | 2°C | -4°C | 9°C 2017 | -12°C 2003 | 14% |
| Jan 7 | 2°C | -4°C | 11°C 2020 | -10°C 2010 | 13% |
| Jan 8 | 2°C | -4°C | 11°C 2017 | -10°C 2010 | 13% |
| Jan 9 | 2°C | -4°C | 8°C 1994 | -10°C 2013 | 13% |
| Jan 10 | 2°C | -4°C | 7°C 2002 | -12°C 2013 | 14% |
| Jan 11 | 2°C | -4°C | 6°C 2002 | -11°C 2001 | 14% |
| Jan 12 | 2°C | -4°C | 8°C 2002 | -12°C 2001 | 14% |
| Jan 13 | 2°C | -4°C | 11°C 2002 | -13°C 2001 | 14% |
| Jan 14 | 2°C | -5°C | 13°C 2002 | -15°C 2001 | 14% |
| Jan 15 | 2°C | -5°C | 13°C 2002 | -14°C 2001 | 14% |
| Jan 16 | 2°C | -5°C | 8°C 2002 | -14°C 2011 | 15% |
| Jan 17 | 1°C | -5°C | 6°C 2003 | -12°C 2001 | 15% |
| Jan 18 | 1°C | -5°C | 6°C 2009 | -9°C 2013 | 15% |
| Jan 19 | 1°C | -5°C | 8°C 2002 | -11°C 1994 | 16% |
| Jan 20 | 1°C | -5°C | 7°C 2010 | -11°C 2016 | 16% |
| Jan 21 | 2°C | -5°C | 7°C 2009 | -12°C 2004 | 16% |
| Jan 22 | 2°C | -5°C | 8°C 2009 | -12°C 2004 | 16% |
| Jan 23 | 2°C | -5°C | 8°C 2020 | -11°C 2012 | 16% |
| Jan 24 | 2°C | -5°C | 9°C 1999 | -13°C 2018 | 17% |
| Jan 25 | 2°C | -5°C | 9°C 2020 | -14°C 2018 | 16% |
| Jan 26 | 2°C | -5°C | 10°C 2020 | -15°C 2018 | 15% |
| Jan 27 | 2°C | -5°C | 9°C 1999 | -14°C 2018 | 15% |
| Jan 28 | 2°C | -5°C | 9°C 2020 | -9°C 2003 | 14% |
| Jan 29 | 2°C | -5°C | 8°C 2006 | -11°C 2003 | 13% |
| Jan 30 | 2°C | -5°C | 8°C 2020 | -13°C 1995 | 11% |
| Jan 31 | 2°C | -5°C | 10°C 2013 | -10°C 2011 | 11% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+9).
- January 1
- sunrise 7:45 AM, sunset 5:25 PM
- January 31
- sunrise 7:36 AM, sunset 5:55 PM
Other months
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.