Rio Negro Weather in May
Average highs run from 31°C on May 1 to 29°C on May 31, and lows from 19°C to 17°C. Normal precipitation for the month is 76 mm over about 8 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
- 18°C
- Precipitation
- 76 mm
- Reanalysis high
- 36°CMay 1, 2020
- Reanalysis low
- 8°CMay 25, 2007
- Daylight
- 11 h 24 min to 11 h 02 min
- Cloud cover
- 44%
- Humidity
- 69%
- Dew point
- 16°C
- Wind
- 11.5 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 | Reanalysis high | Reanalysis low | Chance wet |
|---|---|---|---|---|---|
| May 1 | 31°C | 19°C | 36°C 2020 | 8°C 2012 | 20% |
| May 2 | 31°C | 19°C | 36°C 2020 | 10°C 2012 | 19% |
| May 3 | 31°C | 19°C | 36°C 2020 | 10°C 2008 | 19% |
| May 4 | 31°C | 18°C | 36°C 2018 | 10°C 2008 | 19% |
| May 5 | 31°C | 18°C | 36°C 2018 | 12°C 2008 | 21% |
| May 6 | 31°C | 18°C | 35°C 2016 | 11°C 2001 | 23% |
| May 7 | 31°C | 18°C | 35°C 2016 | 10°C 2003 | 23% |
| May 8 | 30°C | 18°C | 36°C 2018 | 8°C 2003 | 23% |
| May 9 | 30°C | 18°C | 36°C 2018 | 9°C 2003 | 24% |
| May 10 | 30°C | 18°C | 34°C 2009 | 10°C 2010 | 24% |
| May 11 | 30°C | 18°C | 36°C 2005 | 10°C 2006 | 23% |
| May 12 | 30°C | 18°C | 36°C 2005 | 9°C 2010 | 23% |
| May 13 | 30°C | 18°C | 36°C 2005 | 9°C 2010 | 22% |
| May 14 | 30°C | 18°C | 34°C 2005 | 11°C 1994 | 22% |
| May 15 | 30°C | 18°C | 35°C 2005 | 9°C 1994 | 24% |
| May 16 | 30°C | 18°C | 35°C 2005 | 9°C 1993 | 25% |
| May 17 | 29°C | 17°C | 35°C 2005 | 10°C 1998 | 26% |
| May 18 | 29°C | 17°C | 35°C 2005 | 9°C 1998 | 26% |
| May 19 | 29°C | 17°C | 35°C 2005 | 10°C 2010 | 26% |
| May 20 | 29°C | 17°C | 34°C 2005 | 9°C 2018 | 27% |
| May 21 | 29°C | 17°C | 34°C 2020 | 8°C 1999 | 26% |
| May 22 | 29°C | 17°C | 33°C 2009 | 10°C 1999 | 26% |
| May 23 | 29°C | 17°C | 33°C 2009 | 11°C 1999 | 26% |
| May 24 | 29°C | 17°C | 32°C 1998 | 8°C 2007 | 26% |
| May 25 | 29°C | 17°C | 34°C 2015 | 8°C 2007 | 26% |
| May 26 | 29°C | 17°C | 35°C 2015 | 10°C 2020 | 26% |
| May 27 | 29°C | 17°C | 34°C 2019 | 8°C 2004 | 25% |
| May 28 | 29°C | 17°C | 34°C 2019 | 12°C 2014 | 26% |
| May 29 | 29°C | 17°C | 35°C 2019 | 12°C 2007 | 25% |
| May 30 | 29°C | 17°C | 35°C 2019 | 9°C 2007 | 24% |
| May 31 | 29°C | 17°C | 34°C 2019 | 8°C 1999 | 23% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-4).
- May 1
- sunrise 5:55 AM, sunset 5:19 PM
- May 31
- sunrise 6:07 AM, sunset 5:09 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 2026-09-26. Sun and moon: computed with the NOAA solar equations and Meeus.