S
M
T
W
T
F
S
30
66°
61°
31
N/A
1
67°
62°
2
68°
64°
3
68°
64°
4
68°
58°
5
67°
63°
6
69°
61°
7
66°
58°
8
67°
58°
9
67°
59°
10
66°
57°
11
67°
57°
12
66°
56°
13
67°
57°
14
64°
60°
15
63°
60°
16
63°
59°
17
64°
60°
18
65°
60°
19
65°
59°
20
64°
59°
21
65°
60°
22
64°
59°
23
65°
59°
24
61°
58°
25
62°
58°
26
63°
57°
27
64°
58°
28
64°
59°
29
63°
58°
30
64°
58°
1
64°
57°
2
63°
58°
3
64°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Penzance
Penzance's September 2026 forecast shows daily high temperatures ranging from 61° to 69°, with overnight lows between 56° and 64°. The average high for September is 65° 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 Penzance. See also: October | November | December.
