S
M
T
W
T
F
S
28
80°
53°
29
79°
55°
30
59°
40°
31
58°
30°
1
67°
30°
2
72°
37°
3
75°
53°
4
70°
54°
5
76°
56°
6
80°
51°
7
79°
54°
8
82°
57°
9
85°
59°
10
85°
56°
11
79°
51°
12
69°
44°
13
77°
52°
14
67°
53°
15
58°
33°
16
61°
25°
17
76°
33°
18
73°
41°
19
59°
33°
20
64°
32°
21
75°
40°
22
81°
52°
23
83°
54°
24
83°
53°
25
86°
61°
26
73°
43°
27
54°
31°
28
62°
27°
29
67°
25°
30
73°
33°
31
58°
31°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in San Antonio
San Antonio's January 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for January is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how January weather will actually feel in San Antonio. See also: February | March | April.
