Viamão Weather in May
Average highs run from 24°C on May 1 to 20°C on May 31, and lows from 14°C to 11°C. Normal precipitation for the month is 109 mm over about 9 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
- 22°C
- Average low
- 13°C
- Precipitation
- 109 mm
- Record high
- 31°CMay 8, 1981
- Record low
- 4°CMay 31, 1979
- Daylight
- 10 h 56 min to 10 h 20 min
- Cloud cover
- 61%
- Humidity
- 84%
- Dew point
- 14°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 | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| May 1 | 24°C | 14°C | 22°C 1992 | 16°C 1979 | 35% |
| May 2 | 24°C | 14°C | 31°C 1994 | 13°C 1992 | 35% |
| May 3 | 23°C | 14°C | 28°C 1997 | 11°C 1979 | 34% |
| May 4 | 23°C | 14°C | 15°C 1992 | 34% | |
| May 5 | 23°C | 14°C | 26°C 1992 | 8°C 1979 | 35% |
| May 6 | 23°C | 14°C | 26°C 1997 | 7°C 1979 | 36% |
| May 7 | 23°C | 13°C | 27°C 1992 | 11°C 1979 | 35% |
| May 8 | 23°C | 13°C | 31°C 1981 | 14°C 1997 | 35% |
| May 9 | 23°C | 13°C | 26°C 1997 | 11°C 1995 | 35% |
| May 10 | 23°C | 13°C | 26°C 1997 | 14°C 1979 | 34% |
| May 11 | 22°C | 13°C | 30°C 1981 | 13°C 1979 | 36% |
| May 12 | 22°C | 13°C | 29°C 1992 | 16°C 1979 | 35% |
| May 13 | 22°C | 13°C | 26°C 1997 | 15°C 1994 | 34% |
| May 14 | 22°C | 13°C | 22°C 1992 | 11°C 1992 | 35% |
| May 15 | 22°C | 13°C | 24°C 1994 | 10°C 1992 | 36% |
| May 16 | 22°C | 13°C | 26°C 1997 | 13°C 1979 | 37% |
| May 17 | 22°C | 13°C | 27°C 1994 | 8°C 1984 | 37% |
| May 18 | 22°C | 13°C | 30°C 1982 | 11°C 1992 | 36% |
| May 19 | 22°C | 12°C | 29°C 1997 | 8°C 1978 | 36% |
| May 20 | 22°C | 12°C | 25°C 1997 | 13°C 1979 | 35% |
| May 21 | 21°C | 12°C | 8°C 1995 | 35% | |
| May 22 | 21°C | 12°C | 24°C 1979 | 16°C 1979 | 35% |
| May 23 | 21°C | 12°C | 22°C 1988 | 7°C 1997 | 34% |
| May 24 | 21°C | 12°C | 19°C 1995 | 5°C 1997 | 35% |
| May 25 | 21°C | 12°C | 17°C 1995 | 7°C 1979 | 35% |
| May 26 | 21°C | 12°C | 20°C 1979 | 6°C 1995 | 33% |
| May 27 | 21°C | 12°C | 26°C 1992 | 5°C 1997 | 33% |
| May 28 | 20°C | 11°C | 8°C 1979 | 33% | |
| May 29 | 20°C | 11°C | 26°C 1984 | 11°C 1997 | 34% |
| May 30 | 20°C | 11°C | 19°C 1992 | 6°C 1979 | 34% |
| May 31 | 20°C | 11°C | 20°C 1995 | 4°C 1979 | 34% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-3).
- May 1
- sunrise 6:53 AM, sunset 5:49 PM
- May 31
- sunrise 7:12 AM, sunset 5:32 PM
Other months
Sources
Records: NOAA GHCN-Daily, station BRM00083967, 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.