Santarém Weather in September
Average highs run from 32°C on September 1 to 34°C on September 30, and lows from 25°C to 26°C. Normal precipitation for the month is 30 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
- 33°C
- Average low
- 26°C
- Precipitation
- 30 mm
- Reanalysis high
- 38°CSep 21, 1998
- Reanalysis low
- 24°CSep 30, 2000
- Daylight
- 12 h 04 min to 12 h 08 min
- Cloud cover
- 56%
- Humidity
- 70%
- Dew point
- 23°C
- Wind
- 6.8 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 | 32°C | 25°C | 35°C 2018 | 24°C 1994 | 26% |
| Sep 2 | 32°C | 25°C | 35°C 2017 | 24°C 1991 | 26% |
| Sep 3 | 32°C | 25°C | 37°C 1997 | 24°C 1996 | 27% |
| Sep 4 | 32°C | 25°C | 36°C 1992 | 25°C 2013 | 27% |
| Sep 5 | 33°C | 25°C | 36°C 2017 | 24°C 1994 | 27% |
| Sep 6 | 33°C | 26°C | 37°C 1997 | 24°C 1994 | 26% |
| Sep 7 | 33°C | 26°C | 36°C 1997 | 24°C 1993 | 26% |
| Sep 8 | 33°C | 26°C | 36°C 2020 | 24°C 2000 | 25% |
| Sep 9 | 33°C | 26°C | 37°C 1998 | 24°C 1994 | 25% |
| Sep 10 | 33°C | 26°C | 37°C 1998 | 24°C 1994 | 25% |
| Sep 11 | 33°C | 26°C | 37°C 2017 | 24°C 2006 | 25% |
| Sep 12 | 33°C | 26°C | 37°C 2015 | 25°C 2006 | 25% |
| Sep 13 | 33°C | 26°C | 37°C 1998 | 24°C 2013 | 25% |
| Sep 14 | 33°C | 26°C | 37°C 1998 | 24°C 2000 | 24% |
| Sep 15 | 34°C | 26°C | 38°C 2019 | 24°C 2003 | 22% |
| Sep 16 | 34°C | 26°C | 37°C 2019 | 24°C 2004 | 21% |
| Sep 17 | 34°C | 26°C | 37°C 2015 | 24°C 2000 | 20% |
| Sep 18 | 34°C | 26°C | 37°C 2015 | 24°C 2001 | 18% |
| Sep 19 | 34°C | 26°C | 38°C 2017 | 24°C 2000 | 17% |
| Sep 20 | 34°C | 26°C | 38°C 1998 | 24°C 2000 | 17% |
| Sep 21 | 34°C | 26°C | 38°C 1998 | 24°C 2000 | 18% |
| Sep 22 | 34°C | 26°C | 38°C 2019 | 25°C 2000 | 18% |
| Sep 23 | 34°C | 26°C | 38°C 2019 | 25°C 1991 | 18% |
| Sep 24 | 34°C | 26°C | 37°C 2017 | 24°C 1993 | 18% |
| Sep 25 | 34°C | 26°C | 38°C 2019 | 25°C 1999 | 18% |
| Sep 26 | 34°C | 26°C | 37°C 1992 | 24°C 1999 | 19% |
| Sep 27 | 34°C | 26°C | 37°C 1997 | 24°C 1999 | 19% |
| Sep 28 | 34°C | 26°C | 37°C 2015 | 24°C 1994 | 19% |
| Sep 29 | 34°C | 26°C | 37°C 2015 | 24°C 2000 | 20% |
| Sep 30 | 34°C | 26°C | 37°C 1998 | 24°C 2000 | 20% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-3).
- September 1
- sunrise 6:37 AM, sunset 6:41 PM
- September 30
- sunrise 6:25 AM, sunset 6:33 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.