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Mt Isa Climate

Mt Isa Long-term Averages

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Mean Max (°C)
36.4 35.4 34.4 32.0 28.0 24.9 24.8 27.4 31.3 34.7 36.6 37.1 31.9
Mean Min (°C)
23.7 23.3 21.8 18.5 13.8 10.0 8.7 10.2 14.2 18.4 21.5 23.1 17.3
Mean Rain (mm)
118.1 101.3 63.6 14.3 12.7 6.5 6.0 3.6 8.7 17.9 38.6 76.0 470.8
Median Rain (mm)
72.8 85.6 38.0 1.8 3.7 0.0 0.0 0.4 0.4 8.6 25.2 49.4 421.2
Mean Rain Days
9.9 9.0 5.7 2.2 1.7 1.1 0.9 1.0 1.7 3.2 5.4 8.0 48.6

Mt Isa Daily Records

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Max (°C)
45.9 43.5 41.9 38.6 37.8 34.3 35.2 36.4 39.8 42.5 43.9 45.1 45.9
Low Max (°C)
22.8 23.1 23.3 17.0 15.6 9.4 10.1 14.1 14.8 19.1 19.1 20.4 9.4
High Min (°C)
31.6 30.1 29.3 27.3 24.0 20.3 20.1 21.3 26.6 27.6 30.1 30.7 31.6
Low Min (°C)
15.4 13.1 13.1 5.8 1.8 -1.3 -2.9 -1.1 1.0 6.1 10.3 13.4 -2.9
High Rain (mm)
213.0 148.8 153.8 44.6 106.4 54.8 61.8 26.6 70.3 34.2 102.4 109.4 213.0

Mt Isa Monthly Records

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Mn. Max (°C)
39.9 40.5 38.3 35.1 31.1 28.8 26.9 31.6 35.3 38.2 39.8 39.7 34.2
Low Mn. Max (°C)
30.0 31.3 30.2 26.9 24.2 20.4 22.6 24.9 27.6 31.9 32.7 31.6 29.9
High Mn. Min (°C)
26.2 25.5 24.4 20.9 17.7 13.9 12.9 13.8 17.8 21.7 24.1 25.8 19.3
Low Mn. Min (°C)
21.1 19.9 18.4 15.3 9.3 6.5 5.0 5.9 10.8 14.6 19.7 20.1 15.4
High Rain (mm)
535.2 251.8 276.6 167.8 176.4 111.8 67.4 41.8 117.0 91.4 205.6 275.2 1092.4
Low Rain (mm)
0.2 2.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.6 101.6

Mt Isa Annual Temperatures & Rainfall

MOUNT ISA AERO

Mean daily minimum temp
Mean daily maximum temp
Highest/lowest on record
Highest/lowest on record
Mean monthly rainfall

Mt Isa Average Number of Days With Temperatures

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
≥ 40.0°C
4.8 2.4 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.0 6.4 18.3
≥ 35.0°C
21.5 16.2 14.3 4.3 0.2 0.0 0.0 0.3 5.1 16.3 22.1 23.6 120.6
≥ 30.0°C
28.4 25.7 28.6 23.5 9.1 1.7 1.7 7.5 20.2 27.6 28.4 29.2 225.5
≤ 2.0°C
0.0 0.0 0.0 0.0 0.0 0.7 1.4 0.7 0.1 0.0 0.0 0.0 2.7
≤ 0.0°C
0.0 0.0 0.0 0.0 0.0 0.1 0.4 0.1 0.0 0.0 0.0 0.0 0.6

Mt Isa 'per Week' Values (14th/86th Percentiles)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Max
40.0 39.0 37.0 34.7 31.2 28.5 28.4 31.2 35.3 38.0 39.8 40.5 37.9
Low Max
32.0 31.4 31.7 28.9 24.3 21.1 21.0 23.2 26.8 30.9 33.1 33.5 25.1
High Min
26.3 25.7 24.4 22.0 18.5 14.3 13.1 15.0 18.8 22.6 24.9 26.1 24.0
Low Min
21.3 21.2 18.6 15.0 9.4 5.6 4.0 5.6 9.8 14.3 17.9 20.2 9.3

Mt Isa Data Availability

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Years of Minima
50 50 50 50 50 50 50 49 49 49 50 50 49.8
Earliest Entry
1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1966 1966
Latest Entry
2017 2017 2017 2017 2017 2016 2016 2016 2016 2016 2016 2016 2017
Years of Maxima
50 50 51 50 50 50 50 49 49 49 50 50 49.8
Earliest Entry
1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1966 1966
Latest Entry
2017 2017 2017 2017 2017 2016 2016 2016 2016 2016 2016 2016 2017
Years of Rainfall
51 51 51 51 50 50 50 50 49 50 50 50 50.1
Earliest Entry
1967 1967 1967 1967 1968 1967 1967 1967 1968 1967 1967 1966 1966
Latest Entry
2017 2017 2017 2017 2017 2016 2016 2016 2016 2016 2016 2016 2017

Station Details

MOUNT ISA AERO
Northwest, Queensland
20.6778°S 139.4875°E 340m AMSL
Commenced 1966
Display Your Local Weather

Weather News

Second surge of heat could challenge records

10:33 EDT

Another round of intense heat is about to sweep across southern and eastern Australia, challenging December heat records for the second time in a week.

Sydney weather: Temperatures hit 40C in western Sydney ahead of late cool change

18:43 EDT

Demand for ambulances has risen by 40 per cent across the Sydney metro area today, with temperatures in the western suburbs hitting 40 degrees Celsius.

How hot does it get in Australia?

14:43 EDT

With summer underway in Australia and heatwave conditions affecting a number of states this week, a lot of temperature observations are being compared to historical records.