S
M
T
W
T
F
S
30
77°
61°
31
79°
60°
1
78°
59°
2
72°
57°
3
71°
59°
4
72°
59°
5
76°
58°
6
78°
60°
7
79°
60°
8
79°
59°
9
78°
59°
10
75°
58°
11
77°
59°
12
78°
58°
13
77°
59°
14
70°
46°
15
66°
49°
16
67°
53°
17
70°
52°
18
65°
46°
19
66°
49°
20
69°
52°
21
72°
54°
22
73°
52°
23
73°
44°
24
66°
47°
25
68°
50°
26
71°
52°
27
70°
47°
28
70°
42°
29
63°
41°
30
61°
45°
1
60°
50°
2
67°
50°
3
67°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Watford
Watford's September 2026 forecast shows daily high temperatures ranging from 60° to 79°, with overnight lows between 41° and 61°. The average high for September is 71° with an average low of 53°. 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 Watford. See also: October | November | December.
