Mount Isa Weather in September
Average highs run from 31°C on September 1 to 35°C on September 30, and lows from 14°C to 19°C. Normal precipitation for the month is 6 mm over about 0 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
- 16°C
- Precipitation
- 6 mm
- Reanalysis high
- 41°CSep 27, 2017
- Reanalysis low
- 7°CSep 3, 2003
- Daylight
- 11 h 42 min to 12 h 15 min
- Cloud cover
- 19%
- Humidity
- 26%
- Dew point
- 2°C
- Wind
- 16.9 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 | 14°C | 36°C 2000 | 10°C 1996 | 4% |
| Sep 2 | 31°C | 15°C | 35°C 2009 | 8°C 2004 | 4% |
| Sep 3 | 31°C | 15°C | 37°C 2009 | 7°C 2003 | 4% |
| Sep 4 | 31°C | 15°C | 36°C 1998 | 8°C 2003 | 4% |
| Sep 5 | 32°C | 15°C | 36°C 1995 | 10°C 2004 | 4% |
| Sep 6 | 32°C | 15°C | 37°C 2000 | 11°C 2008 | 4% |
| Sep 7 | 32°C | 15°C | 37°C 1992 | 10°C 2017 | 4% |
| Sep 8 | 32°C | 15°C | 38°C 1992 | 12°C 2017 | 4% |
| Sep 9 | 32°C | 15°C | 37°C 2010 | 10°C 2006 | 4% |
| Sep 10 | 32°C | 16°C | 37°C 1995 | 8°C 2006 | 4% |
| Sep 11 | 33°C | 16°C | 37°C 1996 | 9°C 2006 | 4% |
| Sep 12 | 33°C | 16°C | 38°C 2013 | 9°C 2011 | 4% |
| Sep 13 | 33°C | 16°C | 38°C 2013 | 8°C 2004 | 4% |
| Sep 14 | 33°C | 16°C | 37°C 1998 | 7°C 2004 | 4% |
| Sep 15 | 33°C | 16°C | 38°C 2013 | 9°C 1993 | 5% |
| Sep 16 | 33°C | 16°C | 37°C 2007 | 11°C 2012 | 5% |
| Sep 17 | 33°C | 16°C | 38°C 2007 | 11°C 2005 | 5% |
| Sep 18 | 33°C | 16°C | 37°C 1993 | 10°C 2002 | 4% |
| Sep 19 | 34°C | 16°C | 39°C 2007 | 10°C 1999 | 4% |
| Sep 20 | 34°C | 17°C | 38°C 2003 | 10°C 2010 | 4% |
| Sep 21 | 34°C | 17°C | 39°C 2012 | 12°C 1996 | 4% |
| Sep 22 | 34°C | 17°C | 39°C 2012 | 10°C 1996 | 4% |
| Sep 23 | 34°C | 17°C | 40°C 2012 | 10°C 2016 | 4% |
| Sep 24 | 35°C | 17°C | 39°C 2013 | 12°C 2015 | 4% |
| Sep 25 | 35°C | 18°C | 40°C 2013 | 11°C 1998 | 4% |
| Sep 26 | 35°C | 18°C | 40°C 2017 | 12°C 2015 | 4% |
| Sep 27 | 35°C | 18°C | 41°C 2017 | 11°C 2009 | 4% |
| Sep 28 | 35°C | 18°C | 40°C 2017 | 12°C 2009 | 4% |
| Sep 29 | 35°C | 18°C | 40°C 2000 | 12°C 2009 | 4% |
| Sep 30 | 35°C | 19°C | 40°C 2000 | 10°C 2016 | 4% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT+10).
- September 1
- sunrise 6:51 AM, sunset 6:33 PM
- September 30
- sunrise 6:25 AM, sunset 6:40 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.