S
M
T
W
T
F
S
26
84°
62°
27
83°
66°
28
74°
62°
29
72°
58°
30
65°
49°
1
67°
49°
2
70°
47°
3
75°
44°
4
81°
57°
5
68°
51°
6
59°
49°
7
69°
46°
8
75°
50°
9
83°
56°
10
77°
57°
11
78°
54°
12
81°
51°
13
82°
57°
14
79°
50°
15
89°
61°
16
87°
73°
17
89°
71°
18
88°
75°
19
80°
68°
20
70°
60°
21
75°
66°
22
79°
65°
23
82°
63°
24
81°
66°
25
80°
67°
26
81°
66°
27
82°
68°
28
82°
67°
29
83°
67°
30
83°
66°
31
84°
64°
1
84°
62°
2
87°
65°
3
84°
64°
4
80°
59°
5
82°
62°
6
87°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sitka
Sitka's May 2026 forecast shows daily high temperatures ranging from 70° to 87°, with overnight lows between 59° and 68°. The average high for May is 81° with an average low of 65°. 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 Sitka. See also: June | July | August.