S
M
T
W
T
F
S
30
80°
56°
31
79°
56°
1
67°
58°
2
70°
61°
3
77°
61°
4
79°
59°
5
72°
53°
6
73°
52°
7
78°
56°
8
75°
55°
9
76°
60°
10
79°
58°
11
80°
52°
12
73°
51°
13
76°
53°
14
77°
54°
15
72°
51°
16
74°
56°
17
77°
53°
18
69°
50°
19
70°
48°
20
73°
52°
21
76°
55°
22
77°
56°
23
77°
54°
24
76°
53°
25
74°
52°
26
76°
52°
27
75°
53°
28
75°
52°
29
73°
47°
30
65°
44°
1
63°
44°
2
65°
50°
3
71°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Leominster
Leominster's September 2026 forecast shows daily high temperatures ranging from 63° to 80°, with overnight lows between 44° and 61°. The average high for September is 74° with an average low of 53°. 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 Leominster. See also: October | November | December.
