S
M
T
W
T
F
S
29
40°
26°
30
39°
25°
1
33°
24°
2
35°
24°
3
36°
23°
4
39°
24°
5
36°
23°
6
34°
21°
7
27°
16°
8
25°
16°
9
31°
21°
10
37°
22°
11
37°
22°
12
36°
21°
13
36°
21°
14
23°
16°
15
28°
17°
16
34°
16°
17
31°
17°
18
32°
16°
19
31°
11°
20
30°
5°
21
25°
15°
22
28°
12°
23
30°
15°
24
31°
12°
25
33°
8°
26
27°
13°
27
24°
14°
28
31°
14°
29
32°
11°
30
30°
6°
31
30°
0°
1
26°
-3°
2
17°
1°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Hayward
Hayward's December 2026 forecast shows daily high temperatures ranging from 17° to 40°, with overnight lows between -3° and 26°. The average high for December is 31° with an average low of 16°. 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 Hayward. See also: January | February | March.
