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December weather forecast in Whyalla

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30 days Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Sun

Sunday

Mon

Monday

Tue

Tuesday

Wed

Wednesday

Thu

Thursday

Fri

Friday

Sat

Saturday

30 November, sun

	758 mmHg		52%
	7 m/s		+21

30 November, Sunday. day, 29°; night, 15°; clear

1 December, mon

	758 mmHg		51%
	7.2 m/s		+21

1 December, Monday. day, 27°; night, 15°; clear

2 December, tue

	759 mmHg		55%
	7.2 m/s		+21

2 December, Tuesday. day, 27°; night, 14°; clear

3 December, wed

	760 mmHg		50%
	6.6 m/s		+21

3 December, Wednesday. day, 28°; night, 15°; clear

4 December, thu

	759 mmHg		50%
	6.7 m/s		+21

4 December, Thursday. day, 28°; night, 15°; partly cloudy

5 December, fri

	759 mmHg		52%
	6.3 m/s		+21

5 December, Friday. day, 28°; night, 16°; overcast

6 December, sat

	758 mmHg		52%
	6.8 m/s		+21

6 December, Saturday. day, 28°; night, 16°; partly cloudy

7 December, sun

	758 mmHg		49%
	7 m/s		+21

7 December, Sunday. day, 29°; night, 16°; rain

8 December, mon

	759 mmHg		52%
	7.2 m/s		+21

8 December, Monday. day, 29°; night, 16°; rain

9 December, tue

	760 mmHg		55%
	7 m/s		+21

9 December, Tuesday. day, 27°; night, 15°; clear

10 December, wed

	760 mmHg		55%
	7 m/s		+21

10 December, Wednesday. day, 27°; night, 15°; clear

11 December, thu

	760 mmHg		52%
	6.5 m/s		+21

11 December, Thursday. day, 27°; night, 16°; clear

12 December, fri

	759 mmHg		51%
	6.6 m/s		+22

12 December, Friday. day, 29°; night, 16°; partly cloudy

13 December, sat

	759 mmHg		52%
	7 m/s		+22

13 December, Saturday. day, 29°; night, 17°; overcast

14 December, sun

	759 mmHg		52%
	6.4 m/s		+22

14 December, Sunday. day, 28°; night, 17°; overcast

15 December, mon

	758 mmHg		49%
	6.3 m/s		+22

15 December, Monday. day, 29°; night, 16°; clear

16 December, tue

	758 mmHg		47%
	6.4 m/s		+22

16 December, Tuesday. day, 31°; night, 17°; partly cloudy

17 December, wed

	758 mmHg		48%
	6.7 m/s		+22

17 December, Wednesday. day, 30°; night, 18°; rain

18 December, thu

	758 mmHg		46%
	6.7 m/s		+22

18 December, Thursday. day, 31°; night, 18°; clear

19 December, fri

	758 mmHg		47%
	7.4 m/s		+22

19 December, Friday. day, 32°; night, 18°; clear

20 December, sat

	758 mmHg		50%
	6.9 m/s		+22

20 December, Saturday. day, 30°; night, 18°; partly cloudy

21 December, sun

	758 mmHg		52%
	6.7 m/s		+23

21 December, Sunday. day, 28°; night, 17°; rain

22 December, mon

	759 mmHg		51%
	6.8 m/s		+23

22 December, Monday. day, 28°; night, 17°; partly cloudy

23 December, tue

	759 mmHg		50%
	6.8 m/s		+23

23 December, Tuesday. day, 30°; night, 16°; clear

24 December, wed

	759 mmHg		48%
	6.6 m/s		+23

24 December, Wednesday. day, 29°; night, 17°; clear

25 December, thu

	759 mmHg		48%
	7.4 m/s		+23

25 December, Thursday. day, 30°; night, 16°; clear

26 December, fri

	759 mmHg		48%
	7.3 m/s		+23

26 December, Friday. day, 28°; night, 17°; clear

27 December, sat

	759 mmHg		49%
	7.5 m/s		+23

27 December, Saturday. day, 30°; night, 17°; clear

28 December, sun

	759 mmHg		47%
	6.7 m/s		+23

28 December, Sunday. day, 30°; night, 17°; clear

29 December, mon

	759 mmHg		47%
	6.4 m/s		+23

29 December, Monday. day, 31°; night, 18°; clear

30 December, tue

	758 mmHg		46%
	6.5 m/s		+23

30 December, Tuesday. day, 32°; night, 18°; clear

31 December, wed

	758 mmHg		45%
	6.8 m/s		+23

31 December, Wednesday. day, 32°; night, 18°; clear

1 January, thu

	758 mmHg		50%
	7.3 m/s		+24

1 January, Thursday. day, 31°; night, 18°; clear

2 January, fri

	759 mmHg		50%
	7.5 m/s		+23

2 January, Friday. day, 30°; night, 18°; clear

3 January, sat

	758 mmHg		49%
	7.4 m/s		+24

3 January, Saturday. day, 31°; night, 18°; clear

Average data for 10 years

Whyalla December

18

sunny days

4

days with precipitation

3

cloudy days

18 sunny days; 4 days with precipitation; 3 cloudy days;

50

%

air humidity

4.5

m/s

WindS

28

mm of precipitation

(10% of annual average)

+22

°C

Water temperature

air humidity 50%; 28 millimeters of precipitation (10% of annual average); Wind southerly 4.5 Meters per second; Water temperature +22°

Weather graphs for December

TemperatureWater temperaturePrecipitation chance, %Humidity, %Wind, m/sPressure, mmHg

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S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

S

1

Average data for 10 years

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

Daytime temperature

Night-time temperature

Cities near you

Adelaide
Port Augusta
Broken Hill
Woomera
Gawler
Coober Pedy
Mount Gambier
Port Pirie
Clare

Cities with similar weather in December

Nha Trang
Sanya
Havana
Sydney
Ras al-Khaimah
Buenos Aires
Fudjeyra
Lima
Dadonghai

The weather forecast for December 2025 is based on historical data from the past 10 years.

In December, the weather in Whyalla is typically hot. Average daily high temperature in December is about 29 degrees above zero. On average, Whyalla has 18 sunny, 6 partly cloudy, 4 rainy, and 3 cloudy days in December. The rains are usually light.

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