S
M
T
W
T
F
S
30
81°
63°
31
83°
63°
1
82°
56°
2
84°
54°
3
79°
54°
4
78°
57°
5
82°
58°
6
87°
64°
7
88°
66°
8
89°
59°
9
83°
55°
10
80°
58°
11
80°
64°
12
84°
58°
13
88°
53°
14
78°
54°
15
79°
60°
16
83°
61°
17
86°
58°
18
85°
57°
19
79°
60°
20
84°
60°
21
85°
59°
22
85°
59°
23
84°
58°
24
83°
59°
25
84°
59°
26
81°
58°
27
83°
58°
28
83°
57°
29
82°
58°
30
82°
58°
1
81°
47°
2
82°
45°
3
79°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Galva
Galva's September 2026 forecast shows daily high temperatures ranging from 78° to 89°, with overnight lows between 45° and 66°. The average high for September is 83° with an average low of 58°. 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 Galva. See also: October | November | December.