Portimão Weather in September
Average highs run from 24°C on September 1 to 23°C on September 30, and lows from 19°C to 18°C. Normal precipitation for the month is 24 mm over about 3 wet days.
September day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
September at a glance
- Average high
- 23°C
- Average low
- 19°C
- Precipitation
- 24 mm
- Reanalysis high
- 32°CSep 3, 2006
- Reanalysis low
- 15°CSep 17, 2017
- Daylight
- 12 h 58 min to 11 h 50 min
- Cloud cover
- 33%
- Humidity
- 78%
- Dew point
- 17°C
- Wind
- 17.6 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 |
|---|---|---|---|---|---|
| Sep 1 | 24°C | 19°C | 29°C 2012 | 17°C 1992 | 3% |
| Sep 2 | 24°C | 19°C | 29°C 2006 | 17°C 2020 | 2% |
| Sep 3 | 24°C | 19°C | 32°C 2006 | 18°C 2015 | 3% |
| Sep 4 | 24°C | 19°C | 29°C 1992 | 17°C 2015 | 3% |
| Sep 5 | 24°C | 19°C | 32°C 2016 | 16°C 2015 | 3% |
| Sep 6 | 24°C | 19°C | 30°C 2016 | 16°C 2015 | 4% |
| Sep 7 | 24°C | 19°C | 29°C 2011 | 17°C 2008 | 4% |
| Sep 8 | 24°C | 19°C | 30°C 2000 | 17°C 2008 | 5% |
| Sep 9 | 24°C | 19°C | 28°C 2006 | 17°C 1994 | 6% |
| Sep 10 | 24°C | 19°C | 30°C 2003 | 17°C 2002 | 6% |
| Sep 11 | 24°C | 19°C | 29°C 2003 | 17°C 2015 | 7% |
| Sep 12 | 24°C | 19°C | 29°C 2012 | 16°C 2008 | 9% |
| Sep 13 | 24°C | 19°C | 26°C 2008 | 17°C 2008 | 9% |
| Sep 14 | 24°C | 19°C | 28°C 2003 | 17°C 2017 | 10% |
| Sep 15 | 23°C | 19°C | 28°C 1998 | 16°C 2017 | 11% |
| Sep 16 | 23°C | 19°C | 27°C 1991 | 16°C 2017 | 12% |
| Sep 17 | 23°C | 19°C | 28°C 2016 | 15°C 2017 | 12% |
| Sep 18 | 23°C | 19°C | 29°C 1991 | 15°C 2017 | 12% |
| Sep 19 | 23°C | 19°C | 28°C 1991 | 16°C 2017 | 13% |
| Sep 20 | 23°C | 19°C | 26°C 2018 | 16°C 2017 | 14% |
| Sep 21 | 23°C | 19°C | 28°C 2018 | 16°C 2017 | 14% |
| Sep 22 | 23°C | 19°C | 27°C 2018 | 16°C 1994 | 15% |
| Sep 23 | 23°C | 19°C | 28°C 2018 | 16°C 1994 | 16% |
| Sep 24 | 23°C | 19°C | 30°C 2018 | 16°C 1992 | 16% |
| Sep 25 | 23°C | 19°C | 26°C 2018 | 15°C 1996 | 15% |
| Sep 26 | 23°C | 19°C | 26°C 2005 | 15°C 2017 | 15% |
| Sep 27 | 23°C | 19°C | 27°C 2016 | 16°C 1993 | 14% |
| Sep 28 | 23°C | 19°C | 26°C 2018 | 16°C 1993 | 14% |
| Sep 29 | 23°C | 18°C | 26°C 2004 | 16°C 1993 | 14% |
| Sep 30 | 23°C | 18°C | 26°C 2005 | 15°C 1993 | 14% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+1).
- September 1
- sunrise 7:05 AM, sunset 8:03 PM
- September 30
- sunrise 7:29 AM, sunset 7:19 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.