Acajutla Weather in May

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

Average highs run from 31°C on May 1 to 29°C on May 31, and lows from 27°C to 27°C. Normal precipitation for the month is 169 mm over about 23 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: 30°C
Average low: 27°C
Precipitation: 169 mm
Reanalysis high: 35°CMay 19, 1998
Reanalysis low: 25°CMay 25, 1996
Daylight: 12 h 37 min to 12 h 52 min
Cloud cover: 70%
Humidity: 75%
Dew point: 23°C
Wind: 11.9 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	31°C	27°C	33°C 1992	26°C 2010	47%
May 2	31°C	27°C	33°C 2020	26°C 1992	50%
May 3	31°C	27°C	32°C 2004	26°C 2017	51%
May 4	31°C	27°C	33°C 1997	26°C 2009	52%
May 5	31°C	27°C	33°C 1997	26°C 2007	55%
May 6	31°C	27°C	34°C 2002	26°C 2012	58%
May 7	31°C	27°C	33°C 2004	26°C 1995	59%
May 8	31°C	27°C	33°C 2004	26°C 2006	61%
May 9	31°C	27°C	33°C 2010	26°C 2001	62%
May 10	31°C	27°C	34°C 2010	26°C 1999	64%
May 11	31°C	27°C	33°C 2010	26°C 1999	65%
May 12	31°C	27°C	33°C 2002	26°C 1991	67%
May 13	31°C	27°C	33°C 2015	26°C 1991	68%
May 14	30°C	27°C	33°C 2013	25°C 2014	70%
May 15	30°C	27°C	34°C 1998	26°C 2019	72%
May 16	30°C	27°C	34°C 1998	25°C 2019	74%
May 17	30°C	27°C	34°C 1998	26°C 1991	75%
May 18	30°C	27°C	34°C 1998	25°C 2001	77%
May 19	30°C	27°C	35°C 1998	25°C 1996	79%
May 20	30°C	27°C	33°C 1998	25°C 2005	80%
May 21	30°C	27°C	33°C 1998	25°C 2000	81%
May 22	30°C	27°C	33°C 1998	26°C 2000	83%
May 23	30°C	27°C	32°C 1999	25°C 2000	84%
May 24	30°C	27°C	33°C 2003	25°C 2000	86%
May 25	30°C	27°C	33°C 2016	25°C 1996	87%
May 26	29°C	27°C	32°C 2016	25°C 1996	88%
May 27	29°C	27°C	31°C 1993	25°C 2001	88%
May 28	29°C	27°C	32°C 1994	25°C 2013	89%
May 29	29°C	27°C	32°C 2016	25°C 1996	89%
May 30	29°C	27°C	32°C 1999	25°C 1996	90%
May 31	29°C	27°C	31°C 2015	25°C 2000	90%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (CST).

May 1: sunrise 5:38 AM, sunset 6:15 PM
May 31: sunrise 5:31 AM, sunset 6:23 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.