Chalchuapa Weather in May
Average highs run from 33°C on May 1 to 29°C on May 31, and lows from 22°C to 22°C. Normal precipitation for the month is 136 mm over about 19 wet days.
May day by day
The normal high and low for each date, and the record, in °C.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 31°C
- Average low
- 22°C
- Precipitation
- 136 mm
- Record high
- 39°CMay 17, 1998
- Record low
- 19°CMay 3, 1982
- Daylight
- 12 h 38 min to 12 h 53 min
- Cloud cover
- 68%
- Humidity
- 70%
- Dew point
- 19°C
- Wind
- 9.0 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 | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| May 1 | 33°C | 22°C | 35°C 1965 | 19°C 1982 | 39% |
| May 2 | 33°C | 22°C | 35°C 2024 | 20°C 1963 | 41% |
| May 3 | 33°C | 22°C | 37°C 1992 | 19°C 1982 | 42% |
| May 4 | 33°C | 22°C | 35°C 2014 | 19°C 1982 | 44% |
| May 5 | 33°C | 22°C | 36°C 1997 | 21°C 1999 | 44% |
| May 6 | 32°C | 22°C | 36°C 1993 | 22°C 1980 | 46% |
| May 7 | 32°C | 22°C | 37°C 1997 | 21°C 2004 | 48% |
| May 8 | 32°C | 22°C | 35°C 2023 | 21°C 1963 | 49% |
| May 9 | 32°C | 22°C | 36°C 1983 | 20°C 1982 | 49% |
| May 10 | 32°C | 22°C | 37°C 1987 | 22°C 1962 | 51% |
| May 11 | 32°C | 22°C | 35°C 1998 | 22°C 1962 | 51% |
| May 12 | 32°C | 22°C | 36°C 1992 | 21°C 1981 | 52% |
| May 13 | 32°C | 22°C | 36°C 2025 | 22°C 2003 | 54% |
| May 14 | 32°C | 22°C | 38°C 2013 | 21°C 1963 | 57% |
| May 15 | 31°C | 22°C | 36°C 2025 | 21°C 1963 | 59% |
| May 16 | 31°C | 22°C | 36°C 1998 | 20°C 1963 | 60% |
| May 17 | 31°C | 22°C | 39°C 1998 | 22°C 1995 | 60% |
| May 18 | 31°C | 22°C | 38°C 1998 | 21°C 1963 | 61% |
| May 19 | 31°C | 22°C | 38°C 1998 | 21°C 2005 | 64% |
| May 20 | 31°C | 22°C | 37°C 1998 | 21°C 2005 | 66% |
| May 21 | 31°C | 22°C | 37°C 1990 | 22°C 1973 | 67% |
| May 22 | 31°C | 22°C | 35°C 2021 | 20°C 1963 | 68% |
| May 23 | 30°C | 22°C | 36°C 1988 | 21°C 2009 | 70% |
| May 24 | 30°C | 22°C | 36°C 2010 | 19°C 1984 | 72% |
| May 25 | 30°C | 22°C | 34°C 2021 | 22°C 1963 | 71% |
| May 26 | 30°C | 22°C | 36°C 1992 | 20°C 1999 | 72% |
| May 27 | 30°C | 22°C | 36°C 1999 | 20°C 1986 | 73% |
| May 28 | 30°C | 22°C | 37°C 2009 | 20°C 1986 | 74% |
| May 29 | 30°C | 22°C | 36°C 1992 | 21°C 1986 | 74% |
| May 30 | 29°C | 22°C | 36°C 1992 | 19°C 1963 | 75% |
| May 31 | 29°C | 22°C | 36°C 1999 | 19°C 1963 | 76% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (CST).
- May 1
- sunrise 5:37 AM, sunset 6:15 PM
- May 31
- sunrise 5:30 AM, sunset 6:23 PM
Other months
Sources
Records: NOAA GHCN-Daily, station ES000078650, every year on file, quality-flagged values removed. 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 2026-09-29. Sun and moon: computed with the NOAA solar equations and Meeus.