S
M
T
W
T
F
S
30
78°
57°
31
79°
62°
1
84°
55°
2
79°
53°
3
77°
52°
4
75°
53°
5
77°
55°
6
81°
59°
7
85°
63°
8
86°
62°
9
84°
54°
10
77°
54°
11
78°
61°
12
80°
56°
13
84°
51°
14
75°
48°
15
74°
50°
16
75°
56°
17
79°
58°
18
82°
49°
19
75°
57°
20
79°
56°
21
81°
57°
22
81°
57°
23
80°
56°
24
78°
57°
25
80°
57°
26
79°
56°
27
80°
56°
28
80°
55°
29
79°
55°
30
80°
56°
1
80°
49°
2
79°
44°
3
77°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Parsons
Parsons's September 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 44° and 63°. The average high for September is 79° with an average low of 55°. 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 Parsons. See also: October | November | December.