S
M
T
W
T
F
S
30
82°
56°
31
84°
55°
1
84°
58°
2
83°
53°
3
81°
53°
4
78°
51°
5
74°
45°
6
71°
48°
7
74°
50°
8
77°
54°
9
80°
54°
10
72°
45°
11
68°
49°
12
69°
51°
13
76°
52°
14
78°
55°
15
80°
51°
16
75°
43°
17
67°
44°
18
70°
48°
19
66°
40°
20
74°
53°
21
74°
42°
22
Hist. Avg.
68°
43°
23
Hist. Avg.
68°
43°
24
Hist. Avg.
68°
42°
25
Hist. Avg.
67°
42°
26
Hist. Avg.
67°
42°
27
Hist. Avg.
66°
42°
28
Hist. Avg.
66°
41°
29
Hist. Avg.
65°
41°
30
Hist. Avg.
65°
41°
1
Hist. Avg.
64°
41°
2
Hist. Avg.
64°
41°
3
Hist. Avg.
64°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Penticton
Penticton's September 2026 forecast shows daily high temperatures ranging from 66° to 84°, with overnight lows between 40° and 58°. The average high for September is 76° with an average low of 50°. 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 Penticton. See also: October | November | December.
