S
M
T
W
T
F
S
30
66°
50°
31
67°
51°
1
65°
51°
2
64°
50°
3
64°
51°
4
63°
49°
5
64°
47°
6
63°
46°
7
62°
49°
8
63°
50°
9
63°
49°
10
62°
50°
11
63°
50°
12
61°
49°
13
62°
50°
14
63°
50°
15
62°
49°
16
61°
50°
17
62°
48°
18
59°
50°
19
60°
48°
20
61°
48°
21
Hist. Avg.
62°
49°
22
Hist. Avg.
61°
49°
23
Hist. Avg.
61°
48°
24
Hist. Avg.
61°
48°
25
Hist. Avg.
61°
48°
26
Hist. Avg.
61°
48°
27
Hist. Avg.
60°
48°
28
Hist. Avg.
60°
47°
29
Hist. Avg.
60°
47°
30
Hist. Avg.
60°
47°
1
Hist. Avg.
59°
47°
2
Hist. Avg.
59°
47°
3
Hist. Avg.
59°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Grasmere
Grasmere's September 2026 forecast shows daily high temperatures ranging from 59° to 67°, with overnight lows between 46° and 51°. The average high for September is 63° with an average low of 49°. 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 Grasmere. See also: October | November | December.
