When to go · Australia
When to go to Mount Isa
When to go
What the averages say
On these averages, Mount Isa has a mean high between 18°C and 32°C and under 150 mm of rain in May to August.
- Hot months (a mean high of 32°C or more): September to April.
- The warmest month is December (38°C) and the coolest June (25°C). The wettest is January (144 mm) and the driest July (3 mm); about 471 mm of rain falls in a year.
How these sentences are worded
Each sentence is written from the figures by fixed rules, and says no more than they do. Mild to warm: a mean daily high from 18°C up to 32°C. Hot: 32°C or more. Cool: 10°C up to 18°C. Cold: under 10°C. Dry: under 50 mm of rain in the month; wet: 150 mm or more. Humid: a high of 25°C or more with relative humidity of 70% or more. A month is described as good for going when it is mild to warm and not wet.
The year at a glance
- Mild to warm and dry
- Mild to warm, humid or showery
- Hot
- Cool
- Wet
- Cold
- JanHot
- FebHot
- MarHot
- AprHot
- MayMild–warm, dry
- JunMild–warm, dry
- JulMild–warm, dry
- AugMild–warm, dry
- SeptHot
- OctHot
- NovHot
- DecHot
Month by month
Every month in Mount Isa
| Month | High | Low | Rain | Humidity | Cloud | Sunlight (kWh/m²/day) | High in Dubai | What it is like |
|---|---|---|---|---|---|---|---|---|
| January | 36°C | 24°C | 144 mm | 55% | 61% | 6.7 | 23°C | Hot |
| February | 35°C | 22°C | 100 mm | 55% | 51% | 6.9 | 24°C | Hot |
| March | 35°C | 21°C | 60 mm | 50% | 44% | 6.4 | 27°C | Hot |
| April | 33°C | 18°C | 15 mm | 39% | 27% | 5.9 | 31°C | Hot |
| May | 28°C | 14°C | 8 mm | 38% | 25% | 4.9 | 35°C | Mild to warm and dry |
| June | 25°C | 10°C | 12 mm | 42% | 16% | 4.6 | 37°C | Mild to warm and dry |
| July | 25°C | 9°C | 3 mm | 37% | 13% | 4.9 | 39°C | Mild to warm and dry |
| August | 28°C | 11°C | 3 mm | 29% | 11% | 5.8 | 39°C | Mild to warm and dry |
| September | 33°C | 16°C | 5 mm | 26% | 18% | 6.7 | 37°C | Hot |
| October | 36°C | 20°C | 13 mm | 24% | 26% | 7.4 | 34°C | Hot |
| November | 38°C | 23°C | 38 mm | 31% | 41% | 7.4 | 29°C | Hot |
| December | 38°C | 25°C | 70 mm | 40% | 49% | 7.2 | 25°C | Hot |
The Dubai column is Dubai's mean daily high, for comparison.
Modelled averages for an area about 50 km across, not a weather station's record: NASA POWER climatology, 2001–2020. These data were obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program.
When to go nearby
When to go nearby
From the journal
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Plan it
Plan a trip to Mount Isa
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