Mt Isa Climate

Mt Isa Long-term Averages

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
Mean Max (°C)
36.5 35.5 34.5 32.1 28.0 25.0 25.0 27.5 31.5 34.8 36.7 37.3 32.0
Mean Min (°C)
23.8 23.3 21.8 18.5 13.9 10.0 8.7 10.2 14.3 18.5 21.5 23.1 17.3
Mean Rain (mm)
113.5 101.2 64.1 13.1 11.6 7.0 5.6 3.4 8.3 18.1 37.2 69.4 461.0
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
9.7 8.8 5.7 2.0 1.6 1.1 0.9 0.9 1.7 3.2 5.3 7.6 49.0

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 40.4 42.5 43.9 45.3 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 28.2 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 12.0 -2.9
High Rain (mm)
213.0 148.8 153.8 44.6 106.4 54.8 61.8 26.6 70.3 39.2 102.4 115.0 213.0

Mt Isa Monthly Records

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann
High Mn. Max (°C)
40.3 40.5 38.3 35.1 31.1 28.8 27.9 31.6 35.3 38.2 40.1 41.2 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)
535.2 278.2 276.6 167.8 176.4 111.8 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 0.0 93.4

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
5.4 2.8 0.4 0.0 0.0 0.0 0.0 0.0 0.0 1.0 4.5 7.4 21.5
≥ 35.0°C
22.0 16.6 14.8 4.5 0.2 0.0 0.0 0.4 5.5 16.7 22.4 24.1 126.1
≥ 30.0°C
28.8 26.0 28.8 23.9 9.2 1.7 1.9 8.0 20.9 27.9 28.5 29.6 232.9
≤ 2.0°C
0.0 0.0 0.0 0.0 0.0 0.6 1.5 0.7 0.1 0.0 0.0 0.0 2.9
≤ 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
53 54 54 54 54 54 55 54 51 53 54 53 54.0
Earliest Entry
1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1966 1966
Latest Entry
2021 2021 2021 2021 2021 2021 2021 2021 2021 2020 2020 2020 2021
Years of Maxima
54 54 54 54 54 54 55 54 52 53 54 53 54.0
Earliest Entry
1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1966 1966
Latest Entry
2021 2021 2021 2021 2021 2021 2021 2021 2021 2020 2020 2020 2021
Years of Rainfall
55 54 54 55 55 55 55 55 54 54 54 53 54.0
Earliest Entry
1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1967 1966 1966
Latest Entry
2021 2021 2021 2021 2021 2021 2021 2021 2021 2020 2020 2020 2021

Station Details

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

Weather News

Contrails: Why do they form?

12:00 EDT

With travel restrictions beginning to gradually ease and international borders beginning to slowly open, airplanes, and the contrails they form are likely to become more frequent over the next few months.

Wet end to wild week of weather in Australia's southeast

11:46 EDT

There has been plenty of rain to go around in the southeast of Australia for the past week, and the rainfall totals for the past two days may have just summed up the week nicely.

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