S
M
T
W
T
F
S
29
41°
25°
30
41°
23°
1
39°
26°
2
38°
15°
3
36°
11°
4
33°
21°
5
34°
27°
6
38°
28°
7
41°
29°
8
48°
25°
9
35°
19°
10
47°
27°
11
48°
24°
12
Hist. Avg.
36°
18°
13
Hist. Avg.
36°
18°
14
Hist. Avg.
35°
17°
15
Hist. Avg.
35°
17°
16
Hist. Avg.
35°
17°
17
Hist. Avg.
35°
16°
18
Hist. Avg.
34°
16°
19
Hist. Avg.
34°
16°
20
Hist. Avg.
34°
16°
21
Hist. Avg.
34°
16°
22
Hist. Avg.
34°
15°
23
Hist. Avg.
33°
15°
24
Hist. Avg.
33°
15°
25
Hist. Avg.
33°
15°
26
Hist. Avg.
33°
15°
27
Hist. Avg.
33°
14°
28
Hist. Avg.
33°
14°
29
Hist. Avg.
32°
14°
30
Hist. Avg.
32°
14°
31
Hist. Avg.
32°
14°
1
Hist. Avg.
33°
14°
2
Hist. Avg.
33°
14°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Gretna
Gretna's December 2026 forecast shows daily high temperatures ranging from 33° to 48°, with overnight lows between 11° and 29°. The average high for December is 40° with an average low of 23°. 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 Gretna. See also: January | February | March.
