S
M
T
W
T
F
S
30
93°
71°
31
94°
70°
1
94°
71°
2
92°
69°
3
91°
64°
4
88°
67°
5
90°
67°
6
90°
68°
7
91°
69°
8
90°
68°
9
90°
69°
10
91°
67°
11
90°
64°
12
83°
64°
13
83°
66°
14
84°
66°
15
83°
65°
16
84°
66°
17
84°
65°
18
82°
61°
19
81°
57°
20
79°
56°
21
79°
58°
22
81°
59°
23
82°
63°
24
84°
64°
25
85°
62°
26
84°
57°
27
82°
61°
28
79°
56°
29
79°
55°
30
77°
58°
1
Hist. Avg.
81°
52°
2
Hist. Avg.
80°
52°
3
Hist. Avg.
80°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Olive Branch
Olive Branch's September 2026 forecast shows daily high temperatures ranging from 77° to 94°, with overnight lows between 55° and 71°. The average high for September is 86° with an average low of 64°. 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 Olive Branch. See also: October | November | December.