S
M
T
W
T
F
S
30
73°
59°
31
70°
55°
1
72°
52°
2
68°
57°
3
73°
63°
4
68°
57°
5
N/A
6
76°
60°
7
68°
53°
8
65°
50°
9
64°
48°
10
65°
56°
11
66°
50°
12
64°
51°
13
65°
52°
14
67°
54°
15
67°
53°
16
67°
52°
17
65°
51°
18
64°
48°
19
63°
51°
20
66°
53°
21
67°
53°
22
67°
52°
23
66°
53°
24
67°
51°
25
65°
47°
26
63°
46°
27
64°
47°
28
63°
50°
29
62°
50°
30
63°
48°
1
63°
45°
2
62°
49°
3
63°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Sleaford
Sleaford's September 2026 forecast shows daily high temperatures ranging from 62° to 76°, with overnight lows between 45° and 60°. The average high for September is 65° 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 Sleaford. See also: October | November | December.
