S
M
T
W
T
F
S
30
96°
70°
31
97°
70°
1
97°
72°
2
94°
71°
3
93°
70°
4
94°
71°
5
93°
72°
6
93°
72°
7
95°
71°
8
96°
72°
9
96°
72°
10
94°
71°
11
95°
72°
12
95°
71°
13
94°
71°
14
95°
69°
15
92°
68°
16
91°
69°
17
91°
69°
18
92°
70°
19
90°
69°
20
91°
70°
21
92°
71°
22
91°
70°
23
93°
66°
24
94°
65°
25
90°
65°
26
92°
69°
27
91°
68°
28
89°
68°
29
Hist. Avg.
92°
69°
30
Hist. Avg.
91°
69°
1
Hist. Avg.
91°
69°
2
Hist. Avg.
91°
68°
3
Hist. Avg.
91°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Hartland
Hartland's September 2026 forecast shows daily high temperatures ranging from 89° to 97°, with overnight lows between 65° and 72°. The average high for September is 93° 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 Hartland. See also: October | November | December.