S
M
T
W
T
F
S
30
74°
49°
31
73°
49°
1
73°
50°
2
74°
51°
3
73°
51°
4
71°
52°
5
73°
51°
6
72°
50°
7
70°
49°
8
71°
47°
9
69°
48°
10
71°
54°
11
69°
47°
12
69°
46°
13
73°
46°
14
73°
53°
15
72°
53°
16
70°
52°
17
68°
45°
18
72°
44°
19
74°
48°
20
74°
51°
21
73°
46°
22
67°
47°
23
71°
48°
24
69°
46°
25
67°
47°
26
65°
41°
27
68°
41°
28
62°
40°
29
61°
41°
30
61°
40°
1
Hist. Avg.
65°
41°
2
Hist. Avg.
64°
41°
3
Hist. Avg.
64°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Galway
Galway's September 2026 forecast shows daily high temperatures ranging from 61° to 74°, with overnight lows between 40° and 54°. The average high for September is 70° 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 Galway. See also: October | November | December.
