Mount Isa Weather in December

NASA POWER reanalysis for the half-degree grid cell around Mount Isa, 1991-2020; a grid cell is an area average and can differ from a thermometer in town by several degrees

Average highs run from 39°C on December 1 to 37°C on December 31, and lows from 24°C to 24°C. Normal precipitation for the month is 81 mm over about 12 wet days.

December day by day

The normal high and low for each date, in °C.

Normal low
Normal high
Reanalysis extreme high
Reanalysis extreme low

December at a glance

Average high: 38°C
Average low: 24°C
Precipitation: 81 mm
Reanalysis high: 46°CDec 21, 2018
Reanalysis low: 16°CDec 7, 2011
Daylight: 13 h 18 min to 13 h 22 min
Cloud cover: 52%
Humidity: 41%
Dew point: 14°C
Wind: 15.1 km/h

Every day of the month

A wet day has at least 1 mm of precipitation in the reanalysis.

Date	Normal high	Normal low	Reanalysis high	Reanalysis low	Chance wet
Dec 1	39°C	24°C	46°C 2006	16°C 2010	28%
Dec 2	39°C	24°C	44°C 2020	17°C 2009	28%
Dec 3	39°C	24°C	44°C 2002	19°C 2009	30%
Dec 4	39°C	24°C	44°C 2002	18°C 2017	29%
Dec 5	39°C	24°C	43°C 2020	16°C 2017	28%
Dec 6	39°C	24°C	43°C 2020	16°C 2017	27%
Dec 7	39°C	24°C	43°C 2001	16°C 2011	28%
Dec 8	39°C	24°C	44°C 2019	17°C 2011	29%
Dec 9	38°C	24°C	44°C 2009	19°C 2000	30%
Dec 10	38°C	24°C	42°C 2003	19°C 1996	31%
Dec 11	38°C	24°C	43°C 1992	19°C 1996	31%
Dec 12	38°C	24°C	43°C 2019	19°C 1991	32%
Dec 13	38°C	24°C	44°C 2019	16°C 1991	33%
Dec 14	38°C	24°C	42°C 2019	18°C 2011	35%
Dec 15	38°C	24°C	43°C 2017	17°C 2008	35%
Dec 16	38°C	24°C	44°C 2019	18°C 2008	35%
Dec 17	38°C	24°C	44°C 2019	18°C 1991	34%
Dec 18	38°C	24°C	44°C 2019	17°C 1991	34%
Dec 19	38°C	24°C	44°C 2018	18°C 1991	35%
Dec 20	38°C	24°C	44°C 2018	20°C 1999	38%
Dec 21	37°C	24°C	46°C 2018	19°C 2010	40%
Dec 22	37°C	24°C	43°C 2018	19°C 2010	42%
Dec 23	37°C	24°C	44°C 2001	20°C 2007	42%
Dec 24	37°C	24°C	43°C 2019	20°C 1993	42%
Dec 25	37°C	24°C	45°C 2019	20°C 2011	42%
Dec 26	37°C	24°C	44°C 2019	20°C 2006	42%
Dec 27	37°C	24°C	43°C 2002	18°C 2006	42%
Dec 28	37°C	24°C	43°C 2002	18°C 1993	43%
Dec 29	37°C	24°C	43°C 2001	18°C 2000	43%
Dec 30	37°C	24°C	43°C 2013	18°C 2004	44%
Dec 31	37°C	24°C	45°C 2017	18°C 2000	44%

Chance of rain

Chance of a wet day

Sunrise and sunset

Times for 2026, local time (GMT+10).

December 1: sunrise 5:52 AM, sunset 7:10 PM
December 31: sunrise 6:04 AM, sunset 7:26 PM

Every day of December: sun and moon

Other months

Sources

Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.