S
M
T
W
T
F
S
30
79°
57°
31
83°
60°
1
83°
52°
2
82°
51°
3
75°
52°
4
77°
55°
5
80°
60°
6
81°
55°
7
82°
51°
8
74°
54°
9
74°
58°
10
75°
58°
11
79°
56°
12
78°
55°
13
73°
56°
14
71°
49°
15
72°
48°
16
71°
47°
17
71°
51°
18
72°
52°
19
75°
53°
20
72°
55°
21
75°
52°
22
72°
45°
23
69°
51°
24
68°
53°
25
72°
48°
26
66°
48°
27
72°
51°
28
71°
49°
29
65°
50°
30
Hist. Avg.
68°
46°
1
Hist. Avg.
68°
45°
2
Hist. Avg.
68°
45°
3
Hist. Avg.
67°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Leominster
Leominster's September 2026 forecast shows daily high temperatures ranging from 65° to 83°, with overnight lows between 45° and 60°. 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.
