S
M
T
W
T
F
S
30
67°
49°
31
72°
54°
1
76°
55°
2
78°
55°
3
77°
54°
4
68°
45°
5
69°
48°
6
68°
47°
7
73°
50°
8
71°
52°
9
69°
46°
10
69°
46°
11
70°
51°
12
68°
54°
13
67°
46°
14
66°
45°
15
66°
45°
16
67°
46°
17
67°
46°
18
70°
47°
19
75°
50°
20
75°
48°
21
70°
46°
22
68°
46°
23
64°
45°
24
63°
44°
25
63°
41°
26
65°
42°
27
64°
43°
28
66°
50°
29
70°
47°
30
60°
43°
1
61°
44°
2
Hist. Avg.
64°
46°
3
Hist. Avg.
64°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lyman
Lyman's September 2026 forecast shows daily high temperatures ranging from 60° to 78°, with overnight lows between 41° and 55°. The average high for September is 69° with an average low of 48°. 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 Lyman. See also: October | November | December.
