S
M
T
W
T
F
S
30
91°
71°
31
86°
76°
1
93°
74°
2
87°
74°
3
95°
74°
4
91°
69°
5
83°
64°
6
82°
67°
7
82°
67°
8
83°
65°
9
80°
68°
10
82°
66°
11
84°
68°
12
85°
65°
13
82°
64°
14
83°
65°
15
79°
69°
16
77°
70°
17
77°
65°
18
75°
60°
19
75°
61°
20
76°
64°
21
78°
64°
22
81°
67°
23
82°
68°
24
83°
67°
25
81°
66°
26
79°
65°
27
80°
66°
28
80°
65°
29
81°
64°
30
76°
62°
1
71°
59°
2
73°
63°
3
77°
63°
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 71° to 95°, with overnight lows between 59° and 74°. The average high for September is 81° with an average low of 66°. 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.
