S
M
T
W
T
F
S
26
58°
49°
27
59°
50°
28
57°
50°
29
59°
49°
30
59°
50°
31
58°
50°
1
59°
49°
2
59°
46°
3
55°
46°
4
55°
50°
5
59°
50°
6
59°
48°
7
58°
50°
8
56°
48°
9
57°
49°
10
58°
48°
11
57°
49°
12
57°
49°
13
56°
48°
14
58°
49°
15
57°
49°
16
56°
48°
17
57°
49°
18
57°
49°
19
56°
47°
20
57°
48°
21
56°
48°
22
55°
47°
23
56°
47°
24
55°
48°
25
57°
48°
26
53°
46°
27
53°
47°
28
Hist. Avg.
54°
45°
29
Hist. Avg.
54°
45°
30
Hist. Avg.
54°
45°
31
Hist. Avg.
54°
45°
1
Hist. Avg.
54°
45°
2
Hist. Avg.
54°
45°
3
Hist. Avg.
54°
44°
4
Hist. Avg.
53°
44°
5
Hist. Avg.
53°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Reykjavik
Reykjavik's August 2026 forecast shows daily high temperatures ranging from 53° to 59°, with overnight lows between 46° and 50°. The average high for August is 57° with an average low of 48°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Reykjavik. See also: September | October | November.
