S
M
T
W
T
F
S
30
82°
62°
31
76°
67°
1
87°
70°
2
82°
66°
3
81°
65°
4
80°
65°
5
75°
64°
6
75°
55°
7
74°
54°
8
81°
55°
9
85°
63°
10
81°
71°
11
77°
64°
12
72°
64°
13
81°
68°
14
71°
51°
15
70°
52°
16
84°
57°
17
80°
65°
18
77°
61°
19
70°
58°
20
75°
63°
21
65°
56°
22
59°
51°
23
60°
49°
24
64°
48°
25
72°
53°
26
69°
50°
27
68°
52°
28
66°
49°
29
68°
52°
30
72°
50°
1
71°
50°
2
69°
49°
3
66°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Thurmont
Thurmont's September 2026 forecast shows daily high temperatures ranging from 59° to 72°, with overnight lows between 48° and 56°. The average high for September is 67° with an average low of 51°. 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 Thurmont. See also: October | November | December.
