S
M
T
W
T
F
S
26
52°
45°
27
50°
47°
28
49°
41°
29
45°
38°
30
45°
36°
1
40°
32°
2
47°
30°
3
45°
32°
4
73°
33°
5
41°
30°
6
43°
33°
7
41°
30°
8
42°
32°
9
45°
39°
10
46°
32°
11
47°
32°
12
48°
38°
13
45°
32°
14
49°
42°
15
49°
32°
16
49°
42°
17
50°
42°
18
53°
32°
19
51°
32°
20
59°
32°
21
61°
48°
22
54°
48°
23
57°
44°
24
54°
44°
25
50°
43°
26
50°
44°
27
51°
44°
28
55°
45°
29
53°
43°
30
52°
46°
31
53°
44°
1
54°
45°
2
55°
46°
3
56°
44°
4
54°
46°
5
52°
45°
6
50°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Reykjavik
Reykjavik's May 2026 forecast shows daily high temperatures ranging from 50° to 57°, with overnight lows between 43° and 46°. The average high for May is 53° with an average low of 45°. 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 Reykjavik. See also: June | July | August.
