S
M
T
W
T
F
S
30
73°
58°
31
73°
60°
1
69°
53°
2
68°
54°
3
70°
52°
4
64°
55°
5
62°
54°
6
62°
50°
7
68°
51°
8
70°
51°
9
80°
54°
10
63°
51°
11
64°
47°
12
64°
46°
13
62°
46°
14
63°
44°
15
66°
42°
16
68°
51°
17
64°
53°
18
64°
51°
19
63°
53°
20
64°
55°
21
59°
49°
22
61°
41°
23
56°
49°
24
57°
47°
25
54°
52°
26
61°
51°
27
61°
42°
28
N/A
29
61°
46°
30
66°
52°
1
64°
45°
2
59°
43°
3
62°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Riga
Riga's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September 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 September weather will actually feel in Riga. See also: October | November | December.
