S
M
T
W
T
F
S
30
80°
59°
31
81°
55°
1
78°
54°
2
77°
53°
3
76°
52°
4
77°
52°
5
77°
53°
6
78°
57°
7
76°
54°
8
76°
55°
9
77°
52°
10
76°
55°
11
79°
58°
12
80°
58°
13
81°
57°
14
82°
56°
15
80°
53°
16
79°
55°
17
73°
57°
18
80°
56°
19
79°
55°
20
77°
50°
21
80°
47°
22
76°
47°
23
74°
52°
24
77°
54°
25
71°
45°
26
Hist. Avg.
72°
49°
27
Hist. Avg.
72°
48°
28
Hist. Avg.
72°
48°
29
Hist. Avg.
71°
48°
30
Hist. Avg.
71°
47°
1
Hist. Avg.
70°
47°
2
Hist. Avg.
70°
47°
3
Hist. Avg.
70°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Harpster
Harpster's September 2026 forecast shows daily high temperatures ranging from 71° to 82°, with overnight lows between 45° and 59°. The average high for September is 78° with an average low of 54°. 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 Harpster. See also: October | November | December.
