S
M
T
W
T
F
S
29
45°
35°
30
42°
39°
1
42°
38°
2
43°
35°
3
41°
38°
4
40°
37°
5
42°
37°
6
42°
35°
7
40°
30°
8
39°
28°
9
37°
30°
10
40°
37°
11
43°
38°
12
42°
35°
13
42°
32°
14
41°
35°
15
45°
38°
16
45°
35°
17
42°
33°
18
39°
31°
19
37°
29°
20
39°
26°
21
35°
28°
22
38°
34°
23
39°
37°
24
44°
36°
25
38°
29°
26
40°
29°
27
40°
28°
28
38°
27°
29
35°
33°
30
37°
35°
31
39°
31°
1
40°
33°
2
40°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Agassiz
Agassiz's December 2026 forecast shows daily high temperatures ranging from 35° to 45°, with overnight lows between 26° and 39°. The average high for December is 40° with an average low of 33°. 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 Agassiz. See also: January | February | March.