S
M
T
W
T
F
S
29
48°
21°
30
49°
22°
1
48°
17°
2
43°
19°
3
45°
14°
4
41°
29°
5
45°
29°
6
49°
23°
7
50°
24°
8
49°
26°
9
49°
28°
10
48°
22°
11
44°
21°
12
44°
17°
13
Hist. Avg.
44°
16°
14
Hist. Avg.
44°
16°
15
Hist. Avg.
44°
16°
16
Hist. Avg.
44°
16°
17
Hist. Avg.
44°
16°
18
Hist. Avg.
44°
16°
19
Hist. Avg.
44°
16°
20
Hist. Avg.
44°
16°
21
Hist. Avg.
44°
16°
22
Hist. Avg.
44°
16°
23
Hist. Avg.
44°
16°
24
Hist. Avg.
44°
16°
25
Hist. Avg.
44°
16°
26
Hist. Avg.
44°
16°
27
Hist. Avg.
45°
16°
28
Hist. Avg.
45°
16°
29
Hist. Avg.
45°
16°
30
Hist. Avg.
45°
16°
31
Hist. Avg.
45°
16°
1
Hist. Avg.
45°
16°
2
Hist. Avg.
45°
16°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Greeley
Greeley's December 2026 forecast shows daily high temperatures ranging from 41° to 50°, with overnight lows between 14° and 29°. The average high for December is 47° with an average low of 22°. 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 Greeley. See also: January | February | March.
