S
M
T
W
T
F
S
30
73°
61°
31
72°
57°
1
73°
52°
2
70°
57°
3
79°
64°
4
70°
55°
5
73°
52°
6
81°
54°
7
77°
59°
8
63°
54°
9
68°
52°
10
N/A
11
67°
49°
12
68°
57°
13
67°
53°
14
68°
56°
15
63°
50°
16
65°
53°
17
65°
54°
18
66°
52°
19
67°
52°
20
69°
53°
21
69°
53°
22
67°
54°
23
69°
51°
24
68°
50°
25
65°
48°
26
64°
48°
27
66°
50°
28
65°
44°
29
60°
43°
30
59°
43°
1
59°
48°
2
64°
49°
3
63°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Hertford Heath
Hertford Heath's September 2026 forecast shows daily high temperatures ranging from 59° to 69°, with overnight lows between 43° and 57°. The average high for September is 65° 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 Hertford Heath. See also: October | November | December.