S
M
T
W
T
F
S
30
99°
75°
31
94°
75°
1
85°
77°
2
88°
78°
3
92°
75°
4
94°
74°
5
90°
75°
6
93°
74°
7
94°
75°
8
93°
75°
9
91°
73°
10
92°
72°
11
92°
74°
12
90°
74°
13
90°
75°
14
90°
72°
15
89°
70°
16
90°
72°
17
91°
71°
18
91°
70°
19
88°
71°
20
89°
67°
21
89°
71°
22
88°
70°
23
89°
71°
24
89°
71°
25
88°
70°
26
88°
70°
27
87°
69°
28
88°
70°
29
86°
70°
30
87°
69°
1
84°
61°
2
79°
61°
3
79°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Welsh
Welsh's September 2026 forecast shows daily high temperatures ranging from 79° to 94°, with overnight lows between 60° and 75°. The average high for September is 89° with an average low of 70°. 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 Welsh. See also: October | November | December.
