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Australia weather

Weather in Mount Isa for December 2026

Your guide to Mount Isa weather in December - trends and predictions

    Temperatures

  • In general, the average temperature in Mount Isa at the beginning of December is 36 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 35.1 °C by the end of December.

    • Rain 🌧️

  • The climate of Mount Isa in December is notably wet, with an average of 15 rainy days, and a total of 62.2 mm of precipitation.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
16
Dry days
Average rainy days
15
Rainy days
Average snowy days
0
Snow days
Average temperatures
36°/26°
Temperatures
Average wind speed
29 km/h
Avg max wind
Average humidity
37 %
Avg humidity

Mount Isa Weather December

Move between months or click on a day
November
January
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Sunny
35°
2
Heavy rain at times
35°
3
Patchy light rain
34°
4
Sunny
38°
5
Sunny
37°
6
Moderate rain at times
36°
7
Sunny
37°
8
Partly cloudy
39°
9
Partly cloudy
38°
10
Sunny
39°
11
Sunny
37°
12
Sunny
38°
13
Sunny
38°
14
Patchy light drizzle
38°
15
Patchy rain possible
39°
16
Sunny
39°
17
Partly cloudy
38°
18
Partly cloudy
37°
19
Patchy rain possible
36°
20
Patchy rain possible
37°
21
Sunny
35°
22
Sunny
34°
23
Sunny
36°
24
Sunny
36°
25
Patchy rain possible
36°
26
Sunny
36°
27
Sunny
36°
28
Sunny
34°
29
Sunny
34°
30
Sunny
35°
31
Sunny
35°

Temperatures trend during December in Mount Isa

See the weather trend as well as the moving average line

December weather in Mount Isa day by day

Click on a date for more information
November January
Date Weather Temperatures Rain UV More
1 Dec. Sunny
Sunny
 35° /24° 0.5 mm 11
2 Dec. Heavy rain at times
Heavy rain at times
 35° /23° 6.6 mm 11
3 Dec. Patchy light rain
Patchy light rain
 34° /23° 8.3 mm 11
4 Dec. Sunny
Sunny
 38° /26° 0 mm 12
5 Dec. Sunny
Sunny
 37° /27° 0.1 mm 11
6 Dec. Moderate rain at times
Moderate rain at times
 36° /26° 1.1 mm 11
7 Dec. Sunny
Sunny
 37° /28° 0.7 mm 12
8 Dec. Partly cloudy
Partly cloudy
 39° /28° 0 mm 12
9 Dec. Partly cloudy
Partly cloudy
 38° /27° 0.1 mm 12
10 Dec. Sunny
Sunny
 39° /28° 0 mm 12
11 Dec. Sunny
Sunny
 37° /27° 1 mm 11
12 Dec. Sunny
Sunny
 38° /26° 0 mm 12
13 Dec. Sunny
Sunny
 38° /27° 0 mm 12
14 Dec. Patchy light drizzle
Patchy light drizzle
 38° /28° 1.7 mm 11
15 Dec. Patchy rain possible
Patchy rain possible
 39° /28° 0.7 mm 12
16 Dec. Sunny
Sunny
 39° /26° 0 mm 12
17 Dec. Partly cloudy
Partly cloudy
 38° /26° 0.3 mm 12
18 Dec. Partly cloudy
Partly cloudy
 37° /26° 0.1 mm 12
19 Dec. Patchy rain possible
Patchy rain possible
 36° /27° 1.4 mm 11
20 Dec. Patchy rain possible
Patchy rain possible
 37° /26° 1.8 mm 11
21 Dec. Sunny
Sunny
 35° /24° 1.1 mm 11
22 Dec. Sunny
Sunny
 34° /24° 0.4 mm 10
23 Dec. Sunny
Sunny
 36° /26° 3.1 mm 10
24 Dec. Sunny
Sunny
 36° /25° 1.1 mm 10
25 Dec. Patchy rain possible
Patchy rain possible
 36° /25° 5.8 mm 9
26 Dec. Sunny
Sunny
 36° /24° 3.6 mm 10
27 Dec. Sunny
Sunny
 36° /25° 0.6 mm 10
28 Dec. Sunny
Sunny
 34° /25° 0.3 mm 9
29 Dec. Sunny
Sunny
 34° /24° 18 mm 9
30 Dec. Sunny
Sunny
 35° /24° 1.1 mm 9
31 Dec. Sunny
Sunny
 35° /25° 2.6 mm 9
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Important Notice
Our weather forecast for Mount Isa in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Mount Isa forecast closer to your planned date for the most up-to-date weather information.
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Mount Isa in December - FAQ

What are the expected maximum and minimum temperatures in Mount Isa during December?

With daytime temperatures soaring above 36° and not dropping much below 26° at night, December in Mount Isa is quite hot. Staying hydrated and avoiding peak sun hours is advisable.

How much rainfall should be expected in Mount Isa during December?

Moderate rainfall is anticipated in Mount Isa during December, with a total of 62.2 mm spread over approximately 15 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Mount Isa during December?

The average wind speed in Mount Isa during December is 29 km/h, suggesting breezy to windy conditions, depending on your activities.

December rainfall patterns in Mount Isa

Explore the daily rainfall trends and prepare for Mount Isas December weather 💧
Typically, Mount Isa has 15 rainy days in December with a total of 62.2 mm of rainfall.

UV exposure in Mount Isa during December

Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️

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Location coordinates Where is Mount Isa?

Get accurate weather forecasts for Mount Isa, located at latitude -20.725 and longitude 139.497. Stay updated with localized weather information tailored for Mount Isa.

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