S
M
T
W
T
F
S
30
85°
58°
31
80°
67°
1
91°
72°
2
73°
69°
3
88°
69°
4
86°
72°
5
81°
66°
6
79°
63°
7
79°
61°
8
83°
57°
9
87°
64°
10
88°
73°
11
81°
63°
12
82°
58°
13
83°
69°
14
76°
57°
15
75°
52°
16
82°
57°
17
84°
70°
18
84°
68°
19
74°
61°
20
75°
64°
21
72°
63°
22
64°
57°
23
69°
54°
24
65°
50°
25
72°
55°
26
67°
54°
27
64°
58°
28
66°
56°
29
69°
56°
30
75°
58°
1
78°
57°
2
75°
56°
3
73°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Richboro
Richboro's September 2026 forecast shows daily high temperatures ranging from 64° to 78°, with overnight lows between 50° and 58°. The average high for September is 70° with an average low of 56°. 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 Richboro. See also: October | November | December.
