Oeiras Weather in January
Average highs run from 15°C on January 1 to 15°C on January 31, and lows from 12°C to 11°C. Normal precipitation for the month is 71 mm over about 9 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
- 15°C
- Average low
- 11°C
- Precipitation
- 71 mm
- Reanalysis high
- 18°CJan 22, 2008
- Reanalysis low
- 5°CJan 8, 2009
- Daylight
- 9 h 32 min to 10 h 14 min
- Cloud cover
- 60%
- Humidity
- 81%
- Dew point
- 10°C
- Wind
- 21.2 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 | 15°C | 12°C | 18°C 1996 | 7°C 1993 | 36% |
| Jan 2 | 15°C | 12°C | 17°C 2002 | 7°C 1993 | 36% |
| Jan 3 | 15°C | 12°C | 18°C 1996 | 8°C 1993 | 37% |
| Jan 4 | 15°C | 12°C | 18°C 1996 | 7°C 2015 | 37% |
| Jan 5 | 15°C | 12°C | 17°C 1996 | 8°C 1997 | 36% |
| Jan 6 | 15°C | 12°C | 18°C 1996 | 8°C 1997 | 36% |
| Jan 7 | 15°C | 12°C | 17°C 1996 | 7°C 2019 | 36% |
| Jan 8 | 15°C | 12°C | 18°C 1996 | 5°C 2009 | 36% |
| Jan 9 | 15°C | 11°C | 17°C 1995 | 6°C 2009 | 36% |
| Jan 10 | 15°C | 11°C | 17°C 1998 | 6°C 2009 | 36% |
| Jan 11 | 15°C | 11°C | 18°C 2017 | 5°C 2009 | 36% |
| Jan 12 | 15°C | 11°C | 18°C 1998 | 6°C 1999 | 35% |
| Jan 13 | 15°C | 11°C | 17°C 2010 | 5°C 2003 | 34% |
| Jan 14 | 15°C | 11°C | 16°C 1996 | 6°C 2003 | 34% |
| Jan 15 | 15°C | 11°C | 17°C 2020 | 7°C 2003 | 34% |
| Jan 16 | 15°C | 11°C | 17°C 1996 | 7°C 2003 | 35% |
| Jan 17 | 15°C | 11°C | 17°C 1996 | 8°C 2005 | 34% |
| Jan 18 | 15°C | 11°C | 16°C 2010 | 7°C 2017 | 33% |
| Jan 19 | 15°C | 11°C | 17°C 2008 | 5°C 2017 | 31% |
| Jan 20 | 15°C | 11°C | 17°C 2005 | 7°C 2017 | 31% |
| Jan 21 | 15°C | 11°C | 17°C 1998 | 7°C 1994 | 31% |
| Jan 22 | 15°C | 11°C | 18°C 2008 | 6°C 2011 | 31% |
| Jan 23 | 15°C | 11°C | 17°C 2016 | 6°C 2011 | 31% |
| Jan 24 | 15°C | 11°C | 18°C 2016 | 6°C 2011 | 31% |
| Jan 25 | 15°C | 11°C | 17°C 2019 | 7°C 2000 | 31% |
| Jan 26 | 15°C | 11°C | 17°C 2002 | 6°C 2007 | 30% |
| Jan 27 | 15°C | 11°C | 18°C 2003 | 6°C 2007 | 31% |
| Jan 28 | 15°C | 11°C | 17°C 2003 | 5°C 2005 | 31% |
| Jan 29 | 15°C | 11°C | 17°C 2018 | 6°C 2006 | 30% |
| Jan 30 | 15°C | 11°C | 17°C 1999 | 6°C 2006 | 30% |
| Jan 31 | 15°C | 11°C | 17°C 1995 | 6°C 2005 | 30% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+0).
- January 1
- sunrise 7:55 AM, sunset 5:27 PM
- January 31
- sunrise 7:44 AM, sunset 5:58 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.