Riobamba Weather in May
Average highs run from 16°C on May 1 to 16°C on May 31, and lows from 8°C to 7°C. Normal precipitation for the month is 143 mm over about 25 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
- 16°C
- Average low
- 7°C
- Precipitation
- 143 mm
- Reanalysis high
- 21°CMay 5, 2007
- Reanalysis low
- 3°CMay 18, 2006
- Daylight
- 12 h 03 min to 12 h 02 min
- Cloud cover
- 80%
- Humidity
- 87%
- Dew point
- 9°C
- Wind
- 10.4 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 | 16°C | 8°C | 19°C 2005 | 5°C 2013 | 84% |
| May 2 | 16°C | 8°C | 18°C 2005 | 5°C 2005 | 85% |
| May 3 | 16°C | 8°C | 19°C 2005 | 6°C 1995 | 84% |
| May 4 | 17°C | 8°C | 18°C 2007 | 6°C 2018 | 84% |
| May 5 | 17°C | 8°C | 21°C 2007 | 6°C 2012 | 83% |
| May 6 | 17°C | 8°C | 19°C 2001 | 6°C 2009 | 82% |
| May 7 | 17°C | 8°C | 19°C 2007 | 5°C 2008 | 82% |
| May 8 | 16°C | 8°C | 18°C 2007 | 6°C 1993 | 82% |
| May 9 | 16°C | 8°C | 18°C 2007 | 6°C 2019 | 81% |
| May 10 | 16°C | 8°C | 19°C 2007 | 6°C 2014 | 81% |
| May 11 | 16°C | 8°C | 20°C 2007 | 4°C 1995 | 80% |
| May 12 | 16°C | 8°C | 19°C 2007 | 6°C 1995 | 79% |
| May 13 | 16°C | 8°C | 19°C 2007 | 6°C 1991 | 79% |
| May 14 | 16°C | 7°C | 20°C 2007 | 4°C 2006 | 78% |
| May 15 | 16°C | 7°C | 19°C 2010 | 4°C 2006 | 78% |
| May 16 | 16°C | 7°C | 19°C 2007 | 4°C 2006 | 78% |
| May 17 | 16°C | 7°C | 18°C 2007 | 5°C 2014 | 78% |
| May 18 | 16°C | 7°C | 19°C 2005 | 3°C 2006 | 79% |
| May 19 | 16°C | 7°C | 18°C 2007 | 5°C 2016 | 80% |
| May 20 | 16°C | 7°C | 19°C 2007 | 5°C 1993 | 79% |
| May 21 | 16°C | 7°C | 18°C 2007 | 6°C 1999 | 80% |
| May 22 | 16°C | 7°C | 19°C 2010 | 5°C 2009 | 80% |
| May 23 | 16°C | 7°C | 19°C 2005 | 5°C 1992 | 80% |
| May 24 | 16°C | 7°C | 18°C 2005 | 5°C 2012 | 80% |
| May 25 | 16°C | 7°C | 18°C 2010 | 5°C 1992 | 80% |
| May 26 | 16°C | 7°C | 18°C 2016 | 4°C 1996 | 80% |
| May 27 | 16°C | 7°C | 19°C 2007 | 5°C 1992 | 80% |
| May 28 | 16°C | 7°C | 18°C 2009 | 5°C 1995 | 79% |
| May 29 | 16°C | 7°C | 19°C 2010 | 4°C 2017 | 80% |
| May 30 | 16°C | 7°C | 18°C 2016 | 4°C 2000 | 79% |
| May 31 | 16°C | 7°C | 18°C 2009 | 4°C 1993 | 78% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-5).
- May 1
- sunrise 6:10 AM, sunset 6:13 PM
- May 31
- sunrise 6:11 AM, sunset 6:13 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 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.