S
M
T
W
T
F
S
30
93°
71°
31
93°
70°
1
92°
69°
2
93°
70°
3
93°
70°
4
92°
69°
5
92°
69°
6
91°
68°
7
92°
69°
8
92°
68°
9
93°
69°
10
93°
69°
11
92°
68°
12
93°
69°
13
92°
68°
14
90°
65°
15
91°
65°
16
92°
65°
17
93°
66°
18
89°
63°
19
90°
65°
20
88°
63°
21
89°
64°
22
88°
63°
23
85°
62°
24
83°
61°
25
87°
62°
26
87°
62°
27
86°
61°
28
86°
62°
29
85°
61°
30
86°
61°
1
86°
55°
2
81°
52°
3
76°
53°
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 76° to 93°, with overnight lows between 52° and 71°. The average high for September is 89° with an average low of 65°. 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.