Porto Nacional Weather in September
Average highs run from 37°C on September 1 to 37°C on September 30, and lows from 22°C to 24°C. Normal precipitation for the month is 39 mm over about 6 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
- 37°C
- Average low
- 23°C
- Precipitation
- 39 mm
- Reanalysis high
- 42°CSep 29, 2020
- Reanalysis low
- 18°CSep 29, 2007
- Daylight
- 11 h 54 min to 12 h 11 min
- Cloud cover
- 48%
- Humidity
- 45%
- Dew point
- 15°C
- Wind
- 12.6 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 | 37°C | 22°C | 39°C 2016 | 18°C 1991 | 10% |
| Sep 2 | 37°C | 22°C | 40°C 2019 | 18°C 1991 | 11% |
| Sep 3 | 37°C | 22°C | 39°C 2015 | 19°C 2004 | 12% |
| Sep 4 | 37°C | 22°C | 40°C 2019 | 18°C 2004 | 13% |
| Sep 5 | 37°C | 22°C | 40°C 2015 | 18°C 1995 | 13% |
| Sep 6 | 37°C | 22°C | 41°C 1998 | 18°C 2004 | 14% |
| Sep 7 | 37°C | 22°C | 40°C 2016 | 19°C 2011 | 14% |
| Sep 8 | 37°C | 22°C | 41°C 2016 | 18°C 2014 | 14% |
| Sep 9 | 37°C | 22°C | 41°C 1998 | 19°C 2004 | 15% |
| Sep 10 | 37°C | 23°C | 41°C 1998 | 19°C 2003 | 16% |
| Sep 11 | 37°C | 23°C | 40°C 2017 | 19°C 2002 | 17% |
| Sep 12 | 38°C | 23°C | 41°C 2015 | 19°C 2002 | 17% |
| Sep 13 | 38°C | 23°C | 41°C 2019 | 18°C 2002 | 18% |
| Sep 14 | 38°C | 23°C | 42°C 2019 | 20°C 1997 | 18% |
| Sep 15 | 38°C | 23°C | 41°C 2016 | 20°C 2006 | 18% |
| Sep 16 | 38°C | 23°C | 41°C 2016 | 19°C 2006 | 18% |
| Sep 17 | 38°C | 23°C | 41°C 1998 | 21°C 2003 | 20% |
| Sep 18 | 38°C | 23°C | 41°C 1998 | 20°C 2002 | 21% |
| Sep 19 | 38°C | 23°C | 41°C 2019 | 20°C 2002 | 23% |
| Sep 20 | 38°C | 23°C | 42°C 2019 | 19°C 2000 | 25% |
| Sep 21 | 37°C | 23°C | 41°C 2019 | 19°C 2000 | 26% |
| Sep 22 | 37°C | 24°C | 41°C 2005 | 20°C 1994 | 28% |
| Sep 23 | 37°C | 24°C | 41°C 2019 | 20°C 1995 | 31% |
| Sep 24 | 37°C | 24°C | 41°C 2015 | 20°C 1995 | 33% |
| Sep 25 | 37°C | 24°C | 41°C 2011 | 21°C 2002 | 34% |
| Sep 26 | 37°C | 24°C | 41°C 2019 | 20°C 1999 | 36% |
| Sep 27 | 37°C | 24°C | 40°C 2015 | 20°C 2007 | 38% |
| Sep 28 | 37°C | 24°C | 41°C 2020 | 18°C 2007 | 41% |
| Sep 29 | 37°C | 24°C | 42°C 2020 | 18°C 2007 | 43% |
| Sep 30 | 37°C | 24°C | 41°C 2020 | 18°C 2007 | 44% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-3).
- September 1
- sunrise 6:17 AM, sunset 6:11 PM
- September 30
- sunrise 5:58 AM, sunset 6:09 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 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.