San Isidro Weather in May
Average highs run from 24°C on May 1 to 25°C on May 31, and lows from 17°C to 18°C. Normal precipitation for the month is 0 mm over about 0 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
- 24°C
- Average low
- 17°C
- Precipitation
- 0 mm
- Record high
- 35°CMay 12, 2012
- Record low
- 13°CMay 1, 1981
- Daylight
- 13 h 15 min to 13 h 48 min
- Cloud cover
- 59%
- Humidity
- 75%
- Dew point
- 15°C
- Wind
- 20.5 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 | 24°C | 17°C | 32°C 2023 | 13°C 1981 | 7% |
| May 2 | 24°C | 16°C | 32°C 2023 | 14°C 1981 | 7% |
| May 3 | 24°C | 17°C | 27°C 2015 | 13°C 2012 | 7% |
| May 4 | 24°C | 17°C | 26°C 1988 | 14°C 1983 | 7% |
| May 5 | 23°C | 16°C | 28°C 2024 | 14°C 1983 | 7% |
| May 6 | 23°C | 17°C | 28°C 2024 | 14°C 1983 | 7% |
| May 7 | 24°C | 16°C | 31°C 2005 | 14°C 1986 | 7% |
| May 8 | 24°C | 17°C | 31°C 2007 | 14°C 1982 | 6% |
| May 9 | 24°C | 17°C | 32°C 2023 | 14°C 1991 | 5% |
| May 10 | 25°C | 17°C | 35°C 2022 | 14°C 1982 | 5% |
| May 11 | 25°C | 17°C | 32°C 2007 | 14°C 2001 | 5% |
| May 12 | 25°C | 17°C | 35°C 2012 | 14°C 2000 | 6% |
| May 13 | 24°C | 17°C | 32°C 2015 | 13°C 1991 | 6% |
| May 14 | 25°C | 17°C | 35°C 2015 | 15°C 2006 | 5% |
| May 15 | 25°C | 17°C | 33°C 2015 | 14°C 2018 | 5% |
| May 16 | 24°C | 17°C | 29°C 2015 | 15°C 1983 | 5% |
| May 17 | 25°C | 17°C | 29°C 1989 | 15°C 1991 | 5% |
| May 18 | 24°C | 17°C | 28°C 2017 | 14°C 1991 | 4% |
| May 19 | 24°C | 17°C | 31°C 2021 | 14°C 1991 | 4% |
| May 20 | 25°C | 17°C | 31°C 2003 | 14°C 1991 | 4% |
| May 21 | 25°C | 17°C | 34°C 2003 | 14°C 1984 | 4% |
| May 22 | 24°C | 17°C | 30°C 2021 | 14°C 2018 | 4% |
| May 23 | 25°C | 17°C | 33°C 2020 | 15°C 1981 | 4% |
| May 24 | 25°C | 18°C | 34°C 1996 | 15°C 1981 | 4% |
| May 25 | 24°C | 18°C | 30°C 1986 | 16°C 2024 | 4% |
| May 26 | 25°C | 18°C | 32°C 1986 | 15°C 2001 | 3% |
| May 27 | 25°C | 17°C | 28°C 2019 | 15°C 2016 | 3% |
| May 28 | 25°C | 18°C | 32°C 1986 | 15°C 2009 | 3% |
| May 29 | 25°C | 18°C | 30°C 1995 | 16°C 1983 | 3% |
| May 30 | 25°C | 18°C | 31°C 1987 | 16°C 1982 | 3% |
| May 31 | 25°C | 18°C | 29°C 1995 | 16°C 2007 | 3% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+1).
- May 1
- sunrise 7:26 AM, sunset 8:41 PM
- May 31
- sunrise 7:10 AM, sunset 8:58 PM
Other months
Sources
Records: NOAA GHCN-Daily, station SPE00120476, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: 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.