Bahía Blanca Weather in September
Average highs run from 17°C on September 1 to 20°C on September 30, and lows from 4°C to 7°C. Normal precipitation for the month is 49 mm over about 5 wet days.
September day by day
The normal high and low for each date, and the record, in °C.
- Normal low
- Normal high
- Record high
- Record low
September at a glance
- Average high
- 18°C
- Average low
- 5°C
- Precipitation
- 49 mm
- Record high
- 33°CSep 5, 1968
- Record low
- -7°CSep 1, 1988
- Daylight
- 11 h 16 min to 12 h 27 min
- Cloud cover
- 56%
- Humidity
- 65%
- Dew point
- 4°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 | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Sep 1 | 17°C | 4°C | 29°C 1962 | -7°C 1988 | 14% |
| Sep 2 | 17°C | 4°C | 26°C 1973 | -7°C 1978 | 15% |
| Sep 3 | 17°C | 4°C | 27°C 2003 | -5°C 2019 | 16% |
| Sep 4 | 17°C | 4°C | 29°C 2003 | -5°C 1967 | 16% |
| Sep 5 | 17°C | 4°C | 33°C 1968 | -6°C 2008 | 16% |
| Sep 6 | 17°C | 4°C | 30°C 1981 | -6°C 1974 | 16% |
| Sep 7 | 17°C | 4°C | 30°C 1968 | -4°C 1958 | 16% |
| Sep 8 | 17°C | 4°C | 29°C 1985 | -5°C 1994 | 17% |
| Sep 9 | 18°C | 5°C | 30°C 2007 | -5°C 1964 | 18% |
| Sep 10 | 18°C | 5°C | 31°C 2013 | -5°C 1964 | 19% |
| Sep 11 | 18°C | 5°C | 27°C 1991 | -6°C 1957 | 18% |
| Sep 12 | 18°C | 5°C | 29°C 1980 | -4°C 1959 | 17% |
| Sep 13 | 18°C | 5°C | 30°C 1996 | -3°C 2005 | 17% |
| Sep 14 | 18°C | 5°C | 29°C 1993 | -6°C 1981 | 16% |
| Sep 15 | 18°C | 5°C | 29°C 1993 | -2°C 1956 | 18% |
| Sep 16 | 18°C | 5°C | 28°C 2011 | -5°C 1980 | 18% |
| Sep 17 | 19°C | 5°C | 27°C 1995 | -1°C 1956 | 17% |
| Sep 18 | 19°C | 5°C | 26°C 1989 | -3°C 1976 | 16% |
| Sep 19 | 19°C | 6°C | 29°C 2024 | -4°C 1959 | 16% |
| Sep 20 | 19°C | 6°C | 28°C 1976 | -3°C 1998 | 16% |
| Sep 21 | 19°C | 6°C | 27°C 1962 | -4°C 2020 | 17% |
| Sep 22 | 19°C | 6°C | 28°C 1973 | -1°C 1993 | 17% |
| Sep 23 | 20°C | 6°C | 30°C 1959 | -1°C 1985 | 17% |
| Sep 24 | 20°C | 6°C | 29°C 1964 | -3°C 2016 | 18% |
| Sep 25 | 20°C | 6°C | 32°C 1977 | -2°C 1975 | 18% |
| Sep 26 | 20°C | 6°C | 29°C 1977 | -3°C 2012 | 19% |
| Sep 27 | 20°C | 6°C | 28°C 2000 | -2°C 1995 | 21% |
| Sep 28 | 20°C | 6°C | 27°C 1992 | -3°C 2017 | 21% |
| Sep 29 | 20°C | 6°C | 30°C 1996 | -4°C 2009 | 22% |
| Sep 30 | 20°C | 7°C | 31°C 1996 | -2°C 2023 | 21% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-3).
- September 1
- sunrise 7:31 AM, sunset 6:47 PM
- September 30
- sunrise 6:46 AM, sunset 7:13 PM
Other months
Sources
Records: NOAA GHCN-Daily, station AR000877500, every year on file, quality-flagged values removed. 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 2026-09-26. Sun and moon: computed with the NOAA solar equations and Meeus.