Castelo Weather in September
Average highs run from 28°C on September 1 to 28°C on September 30, and lows from 15°C to 16°C. Normal precipitation for the month is 54 mm over about 9 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
- 28°C
- Average low
- 15°C
- Precipitation
- 54 mm
- Reanalysis high
- 38°CSep 25, 2015
- Reanalysis low
- 8°CSep 25, 1999
- Daylight
- 11 h 42 min to 12 h 16 min
- Cloud cover
- 58%
- Humidity
- 73%
- Dew point
- 14°C
- Wind
- 15.5 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 |
|---|---|---|---|---|---|
| Sep 1 | 28°C | 15°C | 35°C 2015 | 10°C 2012 | 22% |
| Sep 2 | 28°C | 15°C | 33°C 1995 | 10°C 2008 | 22% |
| Sep 3 | 28°C | 15°C | 34°C 2019 | 9°C 2011 | 23% |
| Sep 4 | 28°C | 15°C | 34°C 2019 | 10°C 1991 | 24% |
| Sep 5 | 28°C | 15°C | 34°C 2010 | 9°C 2011 | 23% |
| Sep 6 | 28°C | 15°C | 34°C 2008 | 8°C 1991 | 24% |
| Sep 7 | 28°C | 15°C | 34°C 1993 | 11°C 1991 | 25% |
| Sep 8 | 28°C | 15°C | 34°C 1998 | 10°C 1995 | 26% |
| Sep 9 | 28°C | 15°C | 35°C 1997 | 12°C 2006 | 28% |
| Sep 10 | 28°C | 15°C | 36°C 1997 | 12°C 2010 | 29% |
| Sep 11 | 28°C | 15°C | 35°C 2001 | 10°C 2010 | 30% |
| Sep 12 | 28°C | 15°C | 36°C 2019 | 10°C 1994 | 30% |
| Sep 13 | 28°C | 15°C | 35°C 2019 | 11°C 1993 | 30% |
| Sep 14 | 28°C | 16°C | 34°C 1997 | 10°C 1993 | 32% |
| Sep 15 | 28°C | 16°C | 35°C 1997 | 11°C 1993 | 34% |
| Sep 16 | 28°C | 16°C | 33°C 2006 | 11°C 2011 | 35% |
| Sep 17 | 28°C | 16°C | 33°C 2019 | 11°C 2011 | 37% |
| Sep 18 | 28°C | 16°C | 35°C 2016 | 12°C 2011 | 38% |
| Sep 19 | 28°C | 16°C | 35°C 2019 | 11°C 2008 | 40% |
| Sep 20 | 28°C | 16°C | 35°C 2012 | 10°C 2011 | 40% |
| Sep 21 | 28°C | 16°C | 35°C 2019 | 13°C 1996 | 40% |
| Sep 22 | 28°C | 16°C | 35°C 2013 | 13°C 1996 | 41% |
| Sep 23 | 28°C | 16°C | 37°C 2013 | 11°C 1999 | 42% |
| Sep 24 | 28°C | 16°C | 37°C 2007 | 9°C 1999 | 42% |
| Sep 25 | 28°C | 16°C | 38°C 2015 | 8°C 1999 | 41% |
| Sep 26 | 28°C | 16°C | 34°C 2015 | 10°C 1999 | 42% |
| Sep 27 | 28°C | 16°C | 35°C 2003 | 9°C 2012 | 43% |
| Sep 28 | 28°C | 16°C | 36°C 2020 | 11°C 2012 | 43% |
| Sep 29 | 28°C | 16°C | 35°C 2015 | 11°C 1994 | 42% |
| Sep 30 | 28°C | 16°C | 35°C 2020 | 9°C 1994 | 42% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-3).
- September 1
- sunrise 5:54 AM, sunset 5:36 PM
- September 30
- sunrise 5:27 AM, sunset 5:43 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.