Río Grande Weather in May
Average highs run from 30°C on May 1 to 31°C on May 31, and lows from 12°C to 15°C. Normal precipitation for the month is 16 mm over about 3 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
- 31°C
- Average low
- 13°C
- Precipitation
- 16 mm
- Reanalysis high
- 37°CMay 31, 2018
- Reanalysis low
- 5°CMay 2, 2010
- Daylight
- 13 h 03 min to 13 h 30 min
- Cloud cover
- 38%
- Humidity
- 32%
- Dew point
- 1°C
- Wind
- 14.4 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 | 30°C | 12°C | 34°C 2002 | 5°C 2010 | 5% |
| May 2 | 30°C | 12°C | 33°C 2002 | 5°C 2010 | 5% |
| May 3 | 30°C | 12°C | 34°C 2003 | 7°C 2004 | 6% |
| May 4 | 30°C | 12°C | 34°C 2002 | 8°C 1993 | 6% |
| May 5 | 30°C | 12°C | 37°C 2003 | 7°C 1993 | 6% |
| May 6 | 30°C | 12°C | 35°C 2010 | 8°C 2001 | 7% |
| May 7 | 30°C | 12°C | 36°C 2003 | 10°C 1999 | 8% |
| May 8 | 30°C | 12°C | 36°C 2003 | 8°C 1995 | 9% |
| May 9 | 30°C | 13°C | 35°C 2003 | 8°C 1992 | 9% |
| May 10 | 30°C | 13°C | 36°C 2003 | 7°C 1992 | 10% |
| May 11 | 30°C | 13°C | 35°C 1998 | 9°C 1992 | 9% |
| May 12 | 31°C | 13°C | 34°C 2002 | 10°C 2012 | 10% |
| May 13 | 31°C | 13°C | 35°C 1998 | 8°C 1997 | 10% |
| May 14 | 31°C | 13°C | 35°C 2003 | 9°C 2019 | 11% |
| May 15 | 31°C | 13°C | 36°C 2003 | 8°C 2014 | 11% |
| May 16 | 31°C | 13°C | 34°C 1999 | 10°C 2014 | 12% |
| May 17 | 31°C | 13°C | 35°C 2017 | 10°C 1991 | 11% |
| May 18 | 31°C | 13°C | 35°C 2003 | 9°C 1993 | 12% |
| May 19 | 31°C | 13°C | 36°C 2003 | 10°C 2006 | 12% |
| May 20 | 31°C | 14°C | 35°C 2003 | 10°C 2006 | 12% |
| May 21 | 31°C | 14°C | 35°C 2017 | 9°C 1992 | 13% |
| May 22 | 31°C | 14°C | 35°C 1998 | 9°C 1992 | 14% |
| May 23 | 31°C | 14°C | 35°C 1998 | 8°C 2008 | 14% |
| May 24 | 31°C | 14°C | 34°C 1998 | 10°C 1993 | 14% |
| May 25 | 31°C | 14°C | 35°C 2017 | 11°C 1992 | 15% |
| May 26 | 31°C | 15°C | 35°C 2011 | 10°C 2009 | 16% |
| May 27 | 31°C | 15°C | 36°C 2011 | 10°C 2009 | 16% |
| May 28 | 31°C | 15°C | 36°C 2011 | 9°C 1992 | 18% |
| May 29 | 31°C | 15°C | 36°C 2011 | 11°C 2009 | 19% |
| May 30 | 31°C | 15°C | 36°C 2018 | 12°C 1992 | 19% |
| May 31 | 31°C | 15°C | 37°C 2018 | 11°C 2020 | 20% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (CST).
- May 1
- sunrise 6:18 AM, sunset 7:21 PM
- May 31
- sunrise 6:05 AM, sunset 7:35 PM
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.