S
M
T
W
T
F
S
30
87°
61°
31
82°
61°
1
81°
62°
2
81°
61°
3
82°
66°
4
82°
60°
5
85°
61°
6
81°
60°
7
80°
59°
8
79°
58°
9
79°
59°
10
82°
63°
11
84°
63°
12
79°
63°
13
78°
63°
14
83°
64°
15
Hist. Avg.
81°
60°
16
Hist. Avg.
80°
60°
17
Hist. Avg.
80°
59°
18
Hist. Avg.
80°
59°
19
Hist. Avg.
79°
59°
20
Hist. Avg.
79°
58°
21
Hist. Avg.
78°
58°
22
Hist. Avg.
78°
58°
23
Hist. Avg.
78°
57°
24
Hist. Avg.
77°
57°
25
Hist. Avg.
77°
56°
26
Hist. Avg.
76°
56°
27
Hist. Avg.
76°
55°
28
Hist. Avg.
76°
55°
29
Hist. Avg.
75°
54°
30
Hist. Avg.
75°
54°
1
Hist. Avg.
74°
54°
2
Hist. Avg.
74°
53°
3
Hist. Avg.
74°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Greenbelt
Greenbelt's September 2026 forecast shows daily high temperatures ranging from 78° to 87°, with overnight lows between 58° and 66°. The average high for September is 82° with an average low of 62°. 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 Greenbelt. See also: October | November | December.
