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