San Isidro Weather in January

NASA POWER reanalysis for the half-degree grid cell around San Isidro, 1991-2020; a grid cell is an area average and can differ from a thermometer in town by several degrees

Average highs run from 32°C on January 1 to 31°C on January 31, and lows from 19°C to 18°C. Normal precipitation for the month is 93 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: 31°C
Average low: 18°C
Precipitation: 93 mm
Reanalysis high: 41°CJan 3, 2017
Reanalysis low: 11°CJan 11, 2001
Daylight: 13 h 55 min to 13 h 26 min
Cloud cover: 59%
Humidity: 59%
Dew point: 15°C
Wind: 13.3 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	32°C	19°C	38°C 1995	13°C 2013	41%
Jan 2	32°C	19°C	36°C 2005	13°C 2013	41%
Jan 3	32°C	19°C	41°C 2017	12°C 2015	43%
Jan 4	32°C	19°C	36°C 2013	14°C 2009	43%
Jan 5	32°C	19°C	38°C 2020	13°C 2011	41%
Jan 6	32°C	19°C	37°C 2006	14°C 2002	41%
Jan 7	32°C	18°C	39°C 2014	13°C 2010	39%
Jan 8	32°C	18°C	40°C 2006	13°C 1998	38%
Jan 9	32°C	18°C	41°C 2017	15°C 1999	37%
Jan 10	32°C	18°C	37°C 2003	12°C 1999	38%
Jan 11	31°C	18°C	37°C 1997	11°C 2001	38%
Jan 12	31°C	18°C	37°C 1997	13°C 1995	36%
Jan 13	31°C	18°C	37°C 2002	13°C 2001	35%
Jan 14	31°C	18°C	38°C 2005	13°C 2010	34%
Jan 15	31°C	18°C	39°C 1994	11°C 2002	34%
Jan 16	31°C	18°C	37°C 1993	11°C 2002	35%
Jan 17	31°C	18°C	37°C 2009	12°C 2006	35%
Jan 18	31°C	18°C	35°C 2017	12°C 2019	34%
Jan 19	31°C	18°C	36°C 2003	12°C 2009	33%
Jan 20	31°C	18°C	37°C 2004	13°C 2019	34%
Jan 21	31°C	18°C	38°C 2014	14°C 2015	33%
Jan 22	31°C	18°C	37°C 2014	14°C 2000	33%
Jan 23	31°C	18°C	37°C 2014	14°C 1998	34%
Jan 24	31°C	18°C	38°C 2013	14°C 1996	35%
Jan 25	31°C	18°C	36°C 2019	12°C 2014	34%
Jan 26	31°C	18°C	37°C 1998	12°C 2014	34%
Jan 27	31°C	18°C	38°C 1998	15°C 1994	36%
Jan 28	31°C	18°C	36°C 2006	15°C 2007	36%
Jan 29	31°C	18°C	38°C 2005	13°C 1998	37%
Jan 30	31°C	18°C	39°C 2003	14°C 1991	37%
Jan 31	31°C	18°C	40°C 2003	12°C 2005	37%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT-3).

January 1: sunrise 6:29 AM, sunset 8:24 PM
January 31: sunrise 6:53 AM, sunset 8:19 PM

Every day of January: sun and moon

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.