Mount Isa September Weather

Averages and records for weather in Mount Isa, Queensland in the month of September.
Typical Mount Isa September Weather
1991–2020
Average daily high 32.3 °C
Average daily low 14.1 °C
Average monthly precipitation 0.5 cm
Daily chance of precipitation 4.5%
Mount Isa September Weather Records
1926–2023
Highest temperature 40.4 °C September 27, 2017
Lowest temperature 1.0 °C September 2, 2001
Highest daily low 26.6 °C September 25, 1989
Lowest daily high 14.8 °C September 2, 1992
Hottest average high temperature 35.3 °C 2013
Coldest average high temperature 27.6 °C 1978
Most daily precipitation 4.0 cm September 24, 1998
Most monthly precipitation 6.9 cm 1978
Note: Daily averages are a moving average which includes 14 days before and after
Day Average (°C) Record (°C)
High Low High Low
September 1 30.0 12.2 36.6 5.5
September 2 30.1 12.3 36.4 1.0
September 3 30.3 12.4 36.1 4.4
September 4 30.5 12.4 35.8 2.7
September 5 30.6 12.6 35.0 1.1
September 6 30.7 12.7 36.4 1.1
September 7 30.9 12.8 36.7 2.9
September 8 31.0 12.9 36.8 4.6
September 9 31.2 13.0 37.9 4.5
September 10 31.3 13.1 36.1 6.3
September 11 31.5 13.3 36.8 4.0
September 12 31.7 13.5 38.1 5.6
September 13 31.9 13.7 37.7 7.8
September 14 32.1 13.8 38.9 7.6
September 15 32.2 14.0 38.6 6.7
September 16 32.3 14.1 37.3 5.2
September 17 32.5 14.3 37.1 4.6
September 18 32.6 14.5 37.6 4.8
September 19 32.8 14.7 37.3 7.0
September 20 32.9 14.8 38.2 6.6
September 21 33.0 14.9 38.8 6.0
September 22 33.1 15.0 38.1 4.6
September 23 33.2 15.1 39.8 4.5
September 24 33.3 15.3 39.3 6.0
September 25 33.5 15.4 39.8 6.9
September 26 33.6 15.6 39.6 8.9
September 27 33.7 15.8 40.4 10.0
September 28 33.8 16.0 38.9 8.9
September 29 33.9 16.1 39.3 7.8
September 30 34.0 16.3 39.5 5.9
Weather Station Details
Years Station Coordinates
1971–2023 Mount Isa Aero location
1926–1970 Mount Isa Post Office location