S
M
T
W
T
F
S
30
87°
67°
31
85°
68°
1
82°
67°
2
83°
68°
3
86°
68°
4
86°
67°
5
85°
68°
6
86°
68°
7
86°
67°
8
83°
65°
9
83°
62°
10
79°
61°
11
79°
63°
12
83°
61°
13
83°
66°
14
84°
61°
15
80°
58°
16
77°
61°
17
78°
60°
18
82°
63°
19
83°
63°
20
83°
62°
21
82°
64°
22
83°
61°
23
82°
58°
24
78°
57°
25
77°
57°
26
76°
61°
27
81°
61°
28
80°
62°
29
81°
60°
30
80°
57°
1
77°
60°
2
79°
61°
3
79°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Hertford
Hertford's September 2026 forecast shows daily high temperatures ranging from 76° to 87°, with overnight lows between 57° and 68°. The average high for September is 82° with an average low of 63°. 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 Hertford. See also: October | November | December.
