S
M
T
W
T
F
S
26
58°
37°
27
62°
37°
28
62°
39°
29
65°
39°
30
70°
40°
1
73°
41°
2
78°
49°
3
79°
49°
4
78°
50°
5
74°
49°
6
78°
48°
7
79°
45°
8
69°
45°
9
70°
38°
10
74°
46°
11
73°
40°
12
82°
46°
13
65°
45°
14
62°
41°
15
55°
38°
16
50°
37°
17
58°
31°
18
64°
38°
19
68°
40°
20
71°
43°
21
60°
44°
22
76°
51°
23
80°
57°
24
78°
48°
25
79°
48°
26
57°
47°
27
81°
55°
28
92°
59°
29
78°
50°
30
70°
45°
31
71°
48°
1
78°
45°
2
83°
49°
3
83°
49°
4
81°
48°
5
79°
47°
6
83°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fort Spokane
Fort Spokane's May 2026 forecast shows daily high temperatures ranging from 70° to 92°, with overnight lows between 45° and 59°. The average high for May is 80° with an average low of 50°. 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 Fort Spokane. See also: June | July | August.