S
M
T
W
T
F
S
30
67°
52°
31
66°
53°
1
66°
53°
2
67°
52°
3
66°
51°
4
65°
50°
5
65°
52°
6
66°
48°
7
66°
52°
8
67°
51°
9
69°
52°
10
69°
51°
11
65°
53°
12
64°
49°
13
68°
51°
14
68°
48°
15
66°
47°
16
63°
50°
17
66°
49°
18
67°
49°
19
66°
52°
20
67°
53°
21
67°
52°
22
66°
52°
23
63°
51°
24
64°
50°
25
64°
51°
26
62°
49°
27
63°
51°
28
64°
49°
29
64°
48°
30
63°
49°
1
Hist. Avg.
58°
47°
2
Hist. Avg.
58°
47°
3
Hist. Avg.
58°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sleaford
Sleaford's September 2026 forecast shows daily high temperatures ranging from 62° to 69°, with overnight lows between 47° and 53°. 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 Sleaford. See also: October | November | December.
