S
M
T
W
T
F
S
31
67°
41°
1
71°
47°
2
78°
46°
3
76°
50°
4
77°
49°
5
76°
51°
6
74°
52°
7
77°
63°
8
69°
49°
9
67°
35°
10
68°
30°
11
65°
37°
12
53°
39°
13
63°
31°
14
64°
42°
15
57°
45°
16
63°
38°
17
72°
42°
18
79°
41°
19
75°
33°
20
56°
36°
21
59°
33°
22
68°
41°
23
65°
39°
24
59°
35°
25
70°
32°
26
64°
34°
27
61°
38°
28
65°
36°
29
60°
45°
30
55°
27°
1
51°
25°
2
56°
32°
3
67°
35°
4
53°
28°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in St. Patricks
St. Patricks's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 St. Patricks. See also: October | November | December.