S
M
T
W
T
F
S
30
80°
63°
31
88°
71°
1
89°
72°
2
95°
73°
3
92°
68°
4
85°
67°
5
79°
58°
6
80°
57°
7
81°
57°
8
76°
56°
9
79°
55°
10
82°
59°
11
76°
54°
12
76°
52°
13
75°
52°
14
77°
53°
15
80°
58°
16
80°
58°
17
79°
57°
18
75°
56°
19
79°
57°
20
80°
58°
21
80°
58°
22
79°
57°
23
80°
57°
24
80°
56°
25
79°
55°
26
77°
54°
27
78°
55°
28
78°
55°
29
77°
53°
30
75°
53°
1
75°
52°
2
74°
53°
3
76°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Harpster
Harpster's September 2026 forecast shows daily high temperatures ranging from 74° to 95°, with overnight lows between 52° and 73°. The average high for September is 79° with an average low of 57°. 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.
