S
M
T
W
T
F
S
30
89°
57°
31
88°
53°
1
91°
61°
2
94°
54°
3
93°
53°
4
96°
59°
5
95°
57°
6
94°
58°
7
89°
63°
8
87°
60°
9
79°
51°
10
89°
44°
11
92°
56°
12
78°
48°
13
85°
48°
14
87°
57°
15
75°
49°
16
83°
53°
17
69°
57°
18
86°
58°
19
78°
53°
20
69°
50°
21
72°
45°
22
81°
51°
23
75°
56°
24
77°
51°
25
77°
53°
26
86°
52°
27
78°
50°
28
74°
58°
29
77°
52°
30
78°
43°
1
69°
48°
2
87°
44°
3
78°
42°
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 ° 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.