S
M
T
W
T
F
S
26
68°
42°
27
70°
48°
28
60°
35°
29
63°
35°
30
67°
40°
1
63°
41°
2
61°
41°
3
62°
38°
4
66°
36°
5
69°
39°
6
68°
43°
7
61°
39°
8
61°
37°
9
64°
39°
10
62°
37°
11
61°
38°
12
60°
37°
13
62°
38°
14
63°
39°
15
62°
39°
16
62°
40°
17
63°
39°
18
64°
39°
19
67°
40°
20
73°
43°
21
74°
48°
22
73°
43°
23
65°
40°
24
63°
39°
25
64°
45°
26
68°
51°
27
68°
49°
28
75°
50°
29
77°
52°
30
78°
50°
31
77°
47°
1
75°
46°
2
78°
46°
3
79°
51°
4
80°
51°
5
75°
49°
6
80°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Penticton
Penticton's May 2026 forecast shows daily high temperatures ranging from 60° to 80°, with overnight lows between 35° and 55°. The average high for May is 68° with an average low of 43°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Penticton. See also: June | July | August.
