S
M
T
W
T
F
S
31
76°
63°
1
78°
59°
2
79°
57°
3
79°
62°
4
85°
60°
5
88°
64°
6
87°
68°
7
79°
61°
8
76°
56°
9
74°
52°
10
80°
51°
11
83°
54°
12
84°
58°
13
82°
58°
14
85°
55°
15
85°
59°
16
72°
60°
17
85°
56°
18
85°
60°
19
89°
61°
20
87°
61°
21
84°
61°
22
85°
60°
23
88°
60°
24
92°
64°
25
87°
68°
26
80°
70°
27
78°
62°
28
83°
60°
29
74°
64°
30
74°
62°
1
80°
60°
2
73°
55°
3
73°
51°
4
75°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lyman
Lyman's September 2025 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 Lyman. See also: October | November | December.