S
M
T
W
T
F
S
30
74°
50°
31
73°
50°
1
72°
51°
2
74°
54°
3
73°
50°
4
74°
50°
5
75°
48°
6
74°
49°
7
72°
47°
8
73°
48°
9
72°
54°
10
72°
48°
11
71°
46°
12
71°
47°
13
73°
52°
14
75°
49°
15
75°
52°
16
77°
53°
17
78°
52°
18
76°
51°
19
76°
50°
20
75°
43°
21
67°
48°
22
68°
50°
23
71°
49°
24
73°
50°
25
74°
46°
26
72°
40°
27
68°
41°
28
63°
42°
29
62°
42°
30
63°
40°
1
63°
45°
2
Hist. Avg.
67°
46°
3
Hist. Avg.
67°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sligo
Sligo's September 2026 forecast shows daily high temperatures ranging from 62° to 78°, with overnight lows between 40° and 54°. The average high for September is 72° with an average low of 48°. 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 Sligo. See also: October | November | December.
