S
M
T
W
T
F
S
30
83°
61°
31
86°
63°
1
88°
61°
2
87°
63°
3
87°
62°
4
89°
62°
5
89°
61°
6
88°
62°
7
86°
60°
8
82°
57°
9
82°
57°
10
81°
56°
11
80°
61°
12
82°
60°
13
82°
61°
14
84°
60°
15
85°
58°
16
84°
58°
17
85°
55°
18
Hist. Avg.
81°
56°
19
Hist. Avg.
81°
56°
20
Hist. Avg.
81°
56°
21
Hist. Avg.
81°
55°
22
Hist. Avg.
80°
55°
23
Hist. Avg.
80°
55°
24
Hist. Avg.
80°
54°
25
Hist. Avg.
80°
54°
26
Hist. Avg.
80°
54°
27
Hist. Avg.
80°
54°
28
Hist. Avg.
79°
53°
29
Hist. Avg.
79°
53°
30
Hist. Avg.
79°
53°
1
Hist. Avg.
79°
52°
2
Hist. Avg.
78°
52°
3
Hist. Avg.
78°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lowell
Lowell's September 2026 forecast shows daily high temperatures ranging from 80° to 89°, with overnight lows between 55° and 63°. The average high for September is 85° with an average low of 60°. 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 Lowell. See also: October | November | December.
