La Unión Weather in May

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

Average highs run from 34°C on May 1 to 32°C on May 31, and lows from 21°C to 19°C. Normal precipitation for the month is 3 mm over about 0 wet days.

May day by day

The normal high and low for each date, in °C.

Normal low
Normal high
Reanalysis extreme high
Reanalysis extreme low

May at a glance

Average high: 33°C
Average low: 20°C
Precipitation: 3 mm
Reanalysis high: 38°CMay 4, 1997
Reanalysis low: 17°CMay 28, 2007
Daylight: 11 h 56 min to 11 h 50 min
Cloud cover: 49%
Humidity: 66%
Dew point: 18°C
Wind: 20.2 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
May 1	34°C	21°C	35°C 2019	19°C 2013	4%
May 2	34°C	21°C	37°C 2012	19°C 1995	3%
May 3	34°C	21°C	36°C 2015	19°C 1995	3%
May 4	34°C	21°C	38°C 1997	19°C 1995	2%
May 5	34°C	21°C	37°C 1997	19°C 2006	2%
May 6	34°C	21°C	37°C 1997	19°C 1995	2%
May 7	34°C	21°C	37°C 1997	19°C 2008	2%
May 8	34°C	21°C	37°C 2002	19°C 1999	2%
May 9	34°C	21°C	37°C 1997	19°C 2008	2%
May 10	34°C	21°C	36°C 2015	19°C 2003	3%
May 11	34°C	21°C	37°C 2015	19°C 1999	2%
May 12	34°C	21°C	37°C 2015	19°C 2006	2%
May 13	34°C	21°C	36°C 1997	18°C 2006	3%
May 14	33°C	21°C	36°C 1997	18°C 2006	2%
May 15	33°C	20°C	36°C 2016	18°C 2006	2%
May 16	33°C	20°C	35°C 2002	18°C 2006	2%
May 17	33°C	20°C	35°C 1997	17°C 2006	2%
May 18	33°C	20°C	35°C 2015	17°C 2006	2%
May 19	33°C	20°C	37°C 1997	18°C 2006	2%
May 20	33°C	20°C	37°C 1997	18°C 2006	2%
May 21	33°C	20°C	36°C 1997	18°C 2005	2%
May 22	33°C	20°C	37°C 1997	18°C 1996	2%
May 23	33°C	20°C	35°C 2016	18°C 2004	2%
May 24	33°C	20°C	37°C 1997	18°C 2005	2%
May 25	33°C	20°C	36°C 1997	17°C 2005	2%
May 26	32°C	20°C	35°C 2014	17°C 2001	1%
May 27	32°C	20°C	35°C 2014	17°C 2007	1%
May 28	32°C	20°C	35°C 1997	17°C 2007	1%
May 29	32°C	20°C	36°C 1997	17°C 2007	1%
May 30	32°C	20°C	36°C 1997	17°C 2007	1%
May 31	32°C	19°C	34°C 2016	17°C 2007	1%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT-5).

May 1: sunrise 6:22 AM, sunset 6:18 PM
May 31: sunrise 6:26 AM, sunset 6:16 PM

Every day of May: 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.