S
M
T
W
T
F
S
26
55°
35°
27
59°
34°
28
62°
39°
29
66°
37°
30
71°
37°
1
75°
37°
2
78°
45°
3
77°
42°
4
76°
47°
5
72°
48°
6
77°
43°
7
75°
46°
8
73°
43°
9
74°
47°
10
76°
44°
11
74°
45°
12
80°
49°
13
70°
49°
14
78°
50°
15
74°
46°
16
71°
48°
17
70°
47°
18
72°
47°
19
68°
46°
20
67°
45°
21
68°
50°
22
64°
44°
23
68°
45°
24
72°
50°
25
73°
51°
26
72°
50°
27
66°
46°
28
71°
49°
29
70°
51°
30
72°
51°
31
74°
52°
1
75°
53°
2
75°
52°
3
65°
46°
4
64°
47°
5
70°
51°
6
71°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Post Falls
Post Falls's May 2026 forecast shows daily high temperatures ranging from 64° to 80°, with overnight lows between 43° and 53°. The average high for May is 71° 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 May weather will actually feel in Post Falls. See also: June | July | August.
