S
M
T
W
T
F
S
27
65°
45°
28
64°
42°
29
64°
42°
30
65°
41°
31
63°
40°
1
63°
41°
2
64°
45°
3
65°
44°
4
66°
43°
5
67°
42°
6
67°
47°
7
66°
44°
8
65°
42°
9
65°
43°
10
66°
43°
11
66°
50°
12
65°
46°
13
69°
43°
14
68°
43°
15
68°
48°
16
69°
46°
17
66°
49°
18
65°
46°
19
67°
45°
20
67°
45°
21
66°
47°
22
65°
44°
23
66°
46°
24
69°
50°
25
68°
49°
26
67°
50°
27
68°
44°
28
69°
46°
29
Hist. Avg.
69°
50°
30
Hist. Avg.
69°
50°
31
Hist. Avg.
69°
50°
1
Hist. Avg.
69°
50°
2
Hist. Avg.
69°
50°
3
Hist. Avg.
69°
50°
4
Hist. Avg.
69°
50°
5
Hist. Avg.
69°
50°
6
Hist. Avg.
69°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Irwindale
Irwindale's January 2027 forecast shows daily high temperatures ranging from 63° to 69°, with overnight lows between 40° and 50°. The average high for January is 66° with an average low of 45°. 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 Irwindale. See also: February | March | April.
