S
M
T
W
T
F
S
27
63°
41°
28
64°
40°
29
64°
41°
30
65°
44°
31
64°
42°
1
65°
43°
2
66°
44°
3
66°
41°
4
63°
41°
5
65°
43°
6
64°
44°
7
63°
45°
8
64°
42°
9
65°
43°
10
64°
42°
11
62°
43°
12
65°
45°
13
67°
44°
14
64°
43°
15
62°
47°
16
62°
39°
17
63°
40°
18
62°
41°
19
Hist. Avg.
68°
42°
20
Hist. Avg.
68°
42°
21
Hist. Avg.
68°
42°
22
Hist. Avg.
68°
42°
23
Hist. Avg.
68°
42°
24
Hist. Avg.
68°
42°
25
Hist. Avg.
68°
42°
26
Hist. Avg.
68°
42°
27
Hist. Avg.
68°
42°
28
Hist. Avg.
68°
42°
29
Hist. Avg.
68°
42°
30
Hist. Avg.
68°
42°
31
Hist. Avg.
68°
43°
1
Hist. Avg.
68°
43°
2
Hist. Avg.
69°
43°
3
Hist. Avg.
69°
43°
4
Hist. Avg.
69°
43°
5
Hist. Avg.
69°
43°
6
Hist. Avg.
69°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Simi Valley
Simi Valley's January 2027 forecast shows daily high temperatures ranging from 62° to 67°, with overnight lows between 39° and 47°. The average high for January is 64° with an average low of 43°. 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 Simi Valley. See also: February | March | April.
