S
M
T
W
T
F
S
30
66°
52°
31
66°
53°
1
67°
54°
2
67°
52°
3
66°
50°
4
65°
50°
5
66°
53°
6
65°
48°
7
67°
53°
8
67°
51°
9
68°
52°
10
69°
50°
11
64°
52°
12
66°
47°
13
68°
51°
14
67°
50°
15
67°
46°
16
63°
49°
17
66°
47°
18
66°
47°
19
65°
52°
20
66°
52°
21
66°
51°
22
65°
51°
23
63°
49°
24
64°
50°
25
64°
50°
26
63°
49°
27
63°
50°
28
64°
49°
29
64°
48°
30
59°
42°
1
60°
49°
2
60°
47°
3
Hist. Avg.
59°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Harrington
Harrington's September 2026 forecast shows daily high temperatures ranging from 59° to 69°, with overnight lows between 42° and 54°. 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 Harrington. See also: October | November | December.
