S
M
T
W
T
F
S
30
68°
65°
31
76°
68°
1
88°
69°
2
94°
70°
3
80°
63°
4
76°
63°
5
74°
62°
6
73°
58°
7
77°
54°
8
82°
54°
9
76°
68°
10
76°
58°
11
72°
52°
12
81°
54°
13
73°
59°
14
66°
51°
15
75°
54°
16
69°
60°
17
69°
62°
18
68°
57°
19
66°
58°
20
67°
51°
21
62°
46°
22
66°
49°
23
62°
51°
24
65°
48°
25
65°
48°
26
68°
50°
27
69°
49°
28
68°
51°
29
70°
52°
30
68°
53°
1
69°
50°
2
71°
53°
3
61°
52°
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 61° to 71°, with overnight lows between 46° and 58°. The average high for September is 66° 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 Watford. See also: October | November | December.
