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
55°
32°
24
53°
32°
25
52°
44°
26
52°
32°
27
49°
42°
28
50°
32°
29
47°
32°
30
50°
47°
31
56°
47°
1
55°
46°
2
54°
48°
3
56°
49°
4
58°
49°
5
57°
47°
6
55°
46°
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 58°, with overnight lows between 46° and 49°. The average high for May is 55° with an average low of 47°. 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.
