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