Viseu Weather in August
Average highs run from 28°C on August 1 to 29°C on August 31, and lows from 25°C to 25°C. Normal precipitation for the month is 65 mm over about 16 wet days.
August day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
August at a glance
- Average high
- 29°C
- Average low
- 25°C
- Precipitation
- 65 mm
- Reanalysis high
- 31°CAug 31, 2005
- Reanalysis low
- 23°CAug 9, 1991
- Daylight
- 12 h 04 min to 12 h 05 min
- Cloud cover
- 29%
- Humidity
- 82%
- Dew point
- 23°C
- Wind
- 13.3 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 |
|---|---|---|---|---|---|
| Aug 1 | 28°C | 25°C | 30°C 2016 | 24°C 1993 | 74% |
| Aug 2 | 28°C | 25°C | 30°C 2016 | 24°C 2004 | 72% |
| Aug 3 | 28°C | 25°C | 30°C 2016 | 24°C 2001 | 70% |
| Aug 4 | 29°C | 25°C | 30°C 2016 | 24°C 2001 | 68% |
| Aug 5 | 29°C | 25°C | 30°C 2016 | 24°C 2001 | 66% |
| Aug 6 | 29°C | 25°C | 30°C 2016 | 24°C 1991 | 63% |
| Aug 7 | 29°C | 25°C | 30°C 2016 | 24°C 1991 | 62% |
| Aug 8 | 29°C | 25°C | 30°C 2016 | 24°C 1991 | 59% |
| Aug 9 | 29°C | 25°C | 30°C 2016 | 23°C 1991 | 58% |
| Aug 10 | 29°C | 25°C | 30°C 2016 | 24°C 1991 | 56% |
| Aug 11 | 29°C | 25°C | 30°C 2016 | 24°C 1991 | 55% |
| Aug 12 | 29°C | 25°C | 30°C 2016 | 24°C 1991 | 54% |
| Aug 13 | 29°C | 25°C | 30°C 2016 | 24°C 1991 | 53% |
| Aug 14 | 29°C | 25°C | 30°C 2016 | 24°C 2001 | 52% |
| Aug 15 | 29°C | 25°C | 30°C 2016 | 24°C 1991 | 50% |
| Aug 16 | 29°C | 25°C | 30°C 2016 | 24°C 1991 | 47% |
| Aug 17 | 29°C | 25°C | 31°C 2016 | 24°C 2001 | 46% |
| Aug 18 | 29°C | 25°C | 30°C 2016 | 24°C 1991 | 44% |
| Aug 19 | 29°C | 25°C | 30°C 2014 | 24°C 1991 | 42% |
| Aug 20 | 29°C | 25°C | 30°C 2016 | 24°C 1992 | 41% |
| Aug 21 | 29°C | 25°C | 31°C 2016 | 24°C 1991 | 40% |
| Aug 22 | 29°C | 25°C | 31°C 2016 | 24°C 1991 | 38% |
| Aug 23 | 29°C | 25°C | 30°C 2016 | 24°C 1991 | 37% |
| Aug 24 | 29°C | 25°C | 30°C 2016 | 24°C 1991 | 35% |
| Aug 25 | 29°C | 25°C | 30°C 2016 | 24°C 1991 | 33% |
| Aug 26 | 29°C | 25°C | 30°C 2017 | 24°C 1997 | 31% |
| Aug 27 | 29°C | 25°C | 30°C 2015 | 24°C 2001 | 29% |
| Aug 28 | 29°C | 25°C | 31°C 2016 | 24°C 2007 | 28% |
| Aug 29 | 29°C | 25°C | 31°C 2016 | 24°C 1991 | 27% |
| Aug 30 | 29°C | 25°C | 31°C 2016 | 24°C 1991 | 26% |
| Aug 31 | 29°C | 25°C | 31°C 2005 | 24°C 1995 | 26% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-3).
- August 1
- sunrise 6:09 AM, sunset 6:13 PM
- August 31
- sunrise 6:02 AM, sunset 6:07 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.