S
M
T
W
T
F
S
30
88°
65°
31
84°
71°
1
95°
73°
2
81°
70°
3
91°
70°
4
89°
71°
5
83°
65°
6
83°
59°
7
83°
58°
8
87°
58°
9
90°
65°
10
91°
74°
11
79°
64°
12
82°
63°
13
89°
73°
14
81°
60°
15
78°
52°
16
84°
64°
17
86°
69°
18
84°
60°
19
76°
62°
20
79°
64°
21
74°
62°
22
74°
61°
23
75°
60°
24
76°
58°
25
74°
53°
26
75°
55°
27
74°
54°
28
76°
55°
29
75°
52°
30
74°
55°
1
71°
56°
2
76°
57°
3
69°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Catonsville
Catonsville's September 2026 forecast shows daily high temperatures ranging from 69° to 86°, with overnight lows between 52° and 69°. The average high for September is 76° with an average low of 59°. 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 Catonsville. See also: October | November | December.
