S
M
T
W
T
F
S
26
65°
25°
27
68°
28°
28
71°
35°
29
74°
37°
30
79°
37°
1
79°
40°
2
80°
47°
3
81°
41°
4
84°
49°
5
81°
49°
6
85°
44°
7
82°
46°
8
75°
43°
9
79°
39°
10
77°
58°
11
76°
46°
12
82°
43°
13
72°
51°
14
69°
46°
15
58°
41°
16
60°
35°
17
69°
47°
18
69°
38°
19
69°
38°
20
75°
41°
21
72°
38°
22
77°
43°
23
84°
51°
24
81°
48°
25
79°
53°
26
72°
54°
27
78°
55°
28
89°
53°
29
79°
51°
30
72°
44°
31
75°
52°
1
70°
47°
2
75°
51°
3
77°
54°
4
78°
49°
5
77°
50°
6
67°
46°
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 67° to 78°, with overnight lows between 44° and 54°. The average high for May is 74° 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 May weather will actually feel in Penticton. See also: June | July | August.
