S
M
T
W
T
F
S
30
87°
60°
31
91°
67°
1
92°
70°
2
94°
69°
3
95°
72°
4
87°
68°
5
84°
68°
6
80°
59°
7
82°
58°
8
86°
59°
9
90°
71°
10
81°
69°
11
81°
62°
12
80°
64°
13
87°
63°
14
73°
52°
15
86°
49°
16
88°
69°
17
84°
68°
18
76°
56°
19
82°
67°
20
78°
63°
21
78°
63°
22
77°
60°
23
75°
61°
24
74°
54°
25
72°
52°
26
77°
52°
27
77°
50°
28
78°
54°
29
77°
39°
30
77°
54°
1
76°
54°
2
70°
52°
3
68°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Baltimore
Baltimore's September 2026 forecast shows daily high temperatures ranging from 68° to 88°, with overnight lows between 39° and 69°. The average high for September is 77° 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 Baltimore. See also: October | November | December.
