S
M
T
W
T
F
S
29
46°
29°
30
41°
21°
1
32°
15°
2
30°
15°
3
34°
27°
4
36°
27°
5
34°
26°
6
33°
21°
7
30°
18°
8
29°
21°
9
35°
21°
10
40°
25°
11
40°
25°
12
42°
24°
13
41°
25°
14
34°
22°
15
35°
22°
16
34°
19°
17
35°
12°
18
32°
11°
19
33°
6°
20
25°
6°
21
24°
17°
22
34°
16°
23
34°
12°
24
33°
6°
25
29°
20°
26
32°
21°
27
35°
20°
28
35°
19°
29
34°
15°
30
34°
12°
31
30°
4°
1
27°
3°
2
24°
16°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Valparaiso
Valparaiso's December 2026 forecast shows daily high temperatures ranging from 24° to 46°, with overnight lows between 3° and 29°. The average high for December is 34° with an average low of 18°. 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 Valparaiso. See also: January | February | March.
