S
M
T
W
T
F
S
27
39°
26°
28
38°
19°
29
36°
21°
30
34°
22°
31
34°
16°
1
35°
12°
2
32°
18°
3
32°
30°
4
39°
30°
5
40°
29°
6
39°
16°
7
38°
13°
8
33°
16°
9
32°
16°
10
38°
14°
11
35°
11°
12
31°
11°
13
28°
12°
14
33°
13°
15
29°
15°
16
33°
18°
17
37°
14°
18
32°
13°
19
31°
21°
20
33°
26°
21
40°
29°
22
39°
29°
23
40°
28°
24
39°
26°
25
38°
27°
26
38°
28°
27
40°
27°
28
39°
23°
29
38°
22°
30
40°
20°
31
34°
16°
1
46°
24°
2
Hist. Avg.
41°
23°
3
Hist. Avg.
42°
23°
4
Hist. Avg.
42°
24°
5
Hist. Avg.
42°
24°
6
Hist. Avg.
42°
24°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Riverside
Riverside's January 2027 forecast shows daily high temperatures ranging from 28° to 46°, with overnight lows between 11° and 30°. The average high for January is 36° with an average low of 20°. 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 Riverside. See also: February | March | April.
