S
M
T
W
T
F
S
30
82°
65°
31
82°
69°
1
85°
65°
2
86°
64°
3
80°
65°
4
81°
66°
5
82°
68°
6
85°
69°
7
85°
69°
8
84°
68°
9
84°
69°
10
83°
69°
11
85°
68°
12
84°
68°
13
83°
66°
14
84°
65°
15
80°
65°
16
77°
63°
17
78°
62°
18
77°
62°
19
80°
64°
20
81°
66°
21
82°
65°
22
78°
62°
23
78°
65°
24
79°
66°
25
79°
59°
26
80°
63°
27
80°
63°
28
80°
64°
29
Hist. Avg.
77°
62°
30
Hist. Avg.
77°
62°
1
Hist. Avg.
77°
62°
2
Hist. Avg.
76°
61°
3
Hist. Avg.
76°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Merrifield
Merrifield's September 2026 forecast shows daily high temperatures ranging from 77° to 86°, with overnight lows between 59° and 69°. The average high for September is 81° with an average low of 65°. 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 Merrifield. See also: October | November | December.