Boa Vista Weather in September
Average highs run from 31°C on September 1 to 32°C on September 30, and lows from 23°C to 23°C. Normal precipitation for the month is 87 mm over about 15 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
- 32°C
- Average low
- 23°C
- Precipitation
- 87 mm
- Reanalysis high
- 40°CSep 29, 2014
- Reanalysis low
- 21°CSep 19, 2002
- Daylight
- 12 h 10 min to 12 h 05 min
- Cloud cover
- 53%
- Humidity
- 81%
- Dew point
- 23°C
- Wind
- 8.6 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 | 31°C | 23°C | 35°C 2015 | 22°C 2007 | 65% |
| Sep 2 | 31°C | 23°C | 35°C 2015 | 22°C 1996 | 63% |
| Sep 3 | 31°C | 23°C | 35°C 2014 | 21°C 2004 | 62% |
| Sep 4 | 31°C | 23°C | 36°C 2015 | 22°C 1998 | 60% |
| Sep 5 | 31°C | 23°C | 35°C 2015 | 21°C 1998 | 60% |
| Sep 6 | 31°C | 23°C | 35°C 2015 | 21°C 1993 | 60% |
| Sep 7 | 31°C | 23°C | 37°C 2015 | 21°C 1991 | 58% |
| Sep 8 | 31°C | 23°C | 36°C 2005 | 21°C 2002 | 55% |
| Sep 9 | 31°C | 23°C | 38°C 2015 | 21°C 1994 | 55% |
| Sep 10 | 31°C | 23°C | 37°C 2015 | 22°C 2001 | 56% |
| Sep 11 | 31°C | 23°C | 37°C 2015 | 22°C 2010 | 55% |
| Sep 12 | 31°C | 23°C | 38°C 2015 | 21°C 1997 | 54% |
| Sep 13 | 31°C | 23°C | 37°C 2015 | 22°C 2002 | 52% |
| Sep 14 | 31°C | 23°C | 37°C 2005 | 22°C 2000 | 51% |
| Sep 15 | 31°C | 23°C | 38°C 2014 | 21°C 2001 | 51% |
| Sep 16 | 32°C | 23°C | 37°C 2014 | 21°C 1995 | 50% |
| Sep 17 | 32°C | 23°C | 36°C 2015 | 22°C 2001 | 49% |
| Sep 18 | 32°C | 23°C | 37°C 2015 | 21°C 1991 | 47% |
| Sep 19 | 32°C | 23°C | 39°C 2015 | 21°C 2002 | 46% |
| Sep 20 | 32°C | 23°C | 38°C 2015 | 22°C 1995 | 45% |
| Sep 21 | 32°C | 23°C | 37°C 2015 | 21°C 1996 | 46% |
| Sep 22 | 32°C | 23°C | 39°C 2015 | 21°C 1992 | 46% |
| Sep 23 | 32°C | 23°C | 39°C 2015 | 21°C 1996 | 47% |
| Sep 24 | 32°C | 23°C | 39°C 2015 | 21°C 1992 | 45% |
| Sep 25 | 32°C | 23°C | 39°C 2014 | 21°C 2006 | 44% |
| Sep 26 | 32°C | 23°C | 39°C 2014 | 22°C 2000 | 44% |
| Sep 27 | 32°C | 23°C | 39°C 2014 | 22°C 1991 | 44% |
| Sep 28 | 32°C | 23°C | 39°C 2014 | 21°C 1991 | 44% |
| Sep 29 | 32°C | 23°C | 40°C 2014 | 21°C 2001 | 43% |
| Sep 30 | 32°C | 23°C | 39°C 2014 | 22°C 2020 | 43% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-4).
- September 1
- sunrise 5:58 AM, sunset 6:08 PM
- September 30
- sunrise 5:50 AM, sunset 5:55 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.