Castro Weather in January
Average highs run from 17°C on January 1 to 17°C on January 31, and lows from 9°C to 10°C. Normal precipitation for the month is 78 mm over about 12 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
- 17°C
- Average low
- 10°C
- Precipitation
- 78 mm
- Reanalysis high
- 27°CJan 21, 2013
- Reanalysis low
- 5°CJan 9, 2019
- Daylight
- 15 h 13 min to 14 h 22 min
- Cloud cover
- 62%
- Humidity
- 83%
- Dew point
- 10°C
- Wind
- 10.4 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 | 17°C | 9°C | 26°C 2011 | 7°C 1997 | 49% |
| Jan 2 | 17°C | 9°C | 24°C 1994 | 7°C 2014 | 48% |
| Jan 3 | 17°C | 9°C | 20°C 2020 | 6°C 2014 | 48% |
| Jan 4 | 17°C | 9°C | 21°C 2012 | 7°C 2017 | 47% |
| Jan 5 | 17°C | 9°C | 21°C 2012 | 6°C 2017 | 46% |
| Jan 6 | 17°C | 9°C | 24°C 2012 | 7°C 1998 | 45% |
| Jan 7 | 17°C | 9°C | 22°C 2016 | 7°C 2000 | 44% |
| Jan 8 | 17°C | 10°C | 22°C 1994 | 6°C 2019 | 44% |
| Jan 9 | 17°C | 10°C | 22°C 2016 | 5°C 2019 | 44% |
| Jan 10 | 17°C | 10°C | 23°C 2013 | 6°C 2007 | 42% |
| Jan 11 | 17°C | 10°C | 21°C 2018 | 7°C 2019 | 41% |
| Jan 12 | 17°C | 10°C | 20°C 2020 | 7°C 1996 | 40% |
| Jan 13 | 17°C | 10°C | 22°C 2013 | 6°C 1996 | 41% |
| Jan 14 | 17°C | 10°C | 22°C 2013 | 7°C 1995 | 41% |
| Jan 15 | 17°C | 10°C | 23°C 2004 | 7°C 2020 | 41% |
| Jan 16 | 17°C | 10°C | 22°C 2012 | 7°C 2020 | 39% |
| Jan 17 | 17°C | 10°C | 22°C 2002 | 6°C 2001 | 37% |
| Jan 18 | 17°C | 10°C | 23°C 2004 | 7°C 2001 | 36% |
| Jan 19 | 17°C | 10°C | 27°C 2013 | 7°C 1996 | 35% |
| Jan 20 | 18°C | 10°C | 27°C 2013 | 8°C 1994 | 36% |
| Jan 21 | 18°C | 10°C | 27°C 2013 | 7°C 2002 | 36% |
| Jan 22 | 18°C | 10°C | 21°C 2012 | 7°C 2000 | 37% |
| Jan 23 | 17°C | 10°C | 25°C 2008 | 7°C 2014 | 38% |
| Jan 24 | 17°C | 10°C | 27°C 2008 | 7°C 2014 | 38% |
| Jan 25 | 17°C | 10°C | 22°C 2017 | 7°C 2019 | 40% |
| Jan 26 | 17°C | 10°C | 25°C 2017 | 6°C 2019 | 40% |
| Jan 27 | 17°C | 10°C | 22°C 1994 | 7°C 2019 | 42% |
| Jan 28 | 17°C | 10°C | 22°C 2008 | 8°C 2005 | 42% |
| Jan 29 | 17°C | 10°C | 27°C 2008 | 7°C 2010 | 42% |
| Jan 30 | 17°C | 10°C | 26°C 2008 | 7°C 2010 | 41% |
| Jan 31 | 17°C | 10°C | 22°C 2008 | 7°C 2010 | 40% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-3).
- January 1
- sunrise 6:22 AM, sunset 9:35 PM
- January 31
- sunrise 6:57 AM, sunset 9:19 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.