S
M
T
W
T
F
S
30
70°
57°
31
N/A
1
65°
52°
2
64°
57°
3
70°
59°
4
66°
49°
5
65°
51°
6
76°
59°
7
75°
60°
8
72°
57°
9
71°
55°
10
69°
54°
11
68°
54°
12
69°
53°
13
70°
54°
14
67°
47°
15
68°
49°
16
66°
48°
17
66°
50°
18
67°
51°
19
68°
51°
20
64°
48°
21
67°
51°
22
67°
52°
23
66°
48°
24
66°
45°
25
65°
44°
26
65°
45°
27
66°
49°
28
66°
49°
29
65°
50°
30
66°
50°
1
66°
49°
2
65°
49°
3
66°
48°
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 64° to 76°, with overnight lows between 44° and 60°. 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 Hertford. See also: October | November | December.
