S
M
T
W
T
F
S
26
52°
47°
27
51°
46°
28
50°
39°
29
45°
38°
30
44°
38°
1
45°
38°
2
48°
38°
3
47°
37°
4
47°
36°
5
48°
35°
6
47°
35°
7
49°
37°
8
46°
39°
9
44°
34°
10
45°
35°
11
45°
35°
12
46°
36°
13
50°
40°
14
50°
41°
15
52°
40°
16
51°
42°
17
51°
42°
18
52°
41°
19
52°
42°
20
51°
42°
21
51°
41°
22
49°
43°
23
50°
43°
24
48°
42°
25
48°
43°
26
49°
42°
27
49°
43°
28
50°
43°
29
49°
40°
30
49°
42°
31
52°
44°
1
51°
44°
2
50°
45°
3
50°
45°
4
52°
44°
5
52°
45°
6
54°
44°
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 44° to 54°, with overnight lows between 34° and 47°. The average high for May is 49° with an average low of 41°. 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.
