S
M
T
W
T
F
S
30
73°
52°
31
73°
51°
1
74°
54°
2
74°
58°
3
73°
61°
4
81°
61°
5
82°
59°
6
81°
52°
7
80°
51°
8
73°
52°
9
73°
50°
10
72°
53°
11
71°
56°
12
71°
52°
13
73°
53°
14
76°
55°
15
75°
54°
16
70°
55°
17
71°
54°
18
73°
53°
19
75°
47°
20
72°
50°
21
72°
47°
22
74°
45°
23
67°
45°
24
67°
46°
25
66°
47°
26
66°
44°
27
67°
44°
28
65°
45°
29
63°
42°
30
64°
42°
1
64°
47°
2
70°
42°
3
68°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Byfield
Byfield's September 2026 forecast shows daily high temperatures ranging from 63° to 82°, with overnight lows between 42° and 61°. The average high for September is 72° with an average low of 50°. 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 Byfield. See also: October | November | December.