S
M
T
W
T
F
S
26
68°
28°
27
71°
31°
28
64°
47°
29
53°
39°
30
52°
32°
1
49°
25°
2
47°
35°
3
58°
29°
4
71°
42°
5
64°
42°
6
54°
30°
7
50°
37°
8
54°
36°
9
67°
36°
10
50°
36°
11
51°
30°
12
55°
23°
13
48°
42°
14
49°
40°
15
70°
35°
16
68°
43°
17
72°
49°
18
77°
50°
19
85°
63°
20
67°
41°
21
60°
33°
22
68°
30°
23
67°
49°
24
56°
51°
25
80°
51°
26
82°
55°
27
76°
45°
28
67°
42°
29
64°
44°
30
65°
48°
31
69°
47°
1
70°
48°
2
71°
49°
3
73°
50°
4
74°
52°
5
72°
53°
6
74°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Chalk River
Chalk River's May 2026 forecast shows daily high temperatures ranging from 56° to 82°, with overnight lows between 42° and 55°. The average high for May is 71° 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 Chalk River. See also: June | July | August.
