S
M
T
W
T
F
S
30
81°
55°
31
84°
54°
1
84°
56°
2
85°
56°
3
84°
55°
4
83°
54°
5
83°
55°
6
82°
54°
7
80°
48°
8
74°
46°
9
81°
52°
10
81°
53°
11
71°
46°
12
73°
47°
13
82°
52°
14
83°
54°
15
81°
50°
16
73°
49°
17
78°
51°
18
79°
52°
19
80°
49°
20
79°
48°
21
77°
51°
22
77°
50°
23
75°
46°
24
72°
40°
25
69°
40°
26
70°
41°
27
73°
41°
28
73°
45°
29
74°
46°
30
72°
37°
1
68°
38°
2
66°
42°
3
71°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Osoyoos
Osoyoos's September 2026 forecast shows daily high temperatures ranging from 66° to 85°, with overnight lows between 37° and 56°. The average high for September is 77° with an average low of 48°. 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 Osoyoos. See also: October | November | December.
