S
M
T
W
T
F
S
29
43°
30°
30
43°
29°
1
41°
28°
2
38°
28°
3
39°
29°
4
42°
30°
5
43°
27°
6
40°
25°
7
33°
25°
8
37°
20°
9
27°
19°
10
31°
20°
11
35°
23°
12
35°
24°
13
34°
23°
14
37°
23°
15
35°
22°
16
35°
23°
17
36°
22°
18
34°
21°
19
33°
21°
20
34°
20°
21
25°
16°
22
29°
5°
23
33°
3°
24
25°
2°
25
19°
3°
26
18°
4°
27
20°
3°
28
25°
-1°
29
20°
17°
30
25°
3°
31
35°
4°
1
18°
4°
2
19°
3°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Perth
Perth's December 2026 forecast shows daily high temperatures ranging from 18° to 43°, with overnight lows between -1° and 30°. The average high for December is 32° with an average low of 17°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Perth. See also: January | February | March.
