S
M
T
W
T
F
S
26
88°
73°
27
89°
75°
28
91°
77°
29
80°
63°
30
72°
61°
1
64°
51°
2
75°
49°
3
80°
47°
4
83°
56°
5
86°
70°
6
78°
63°
7
69°
60°
8
81°
63°
9
89°
70°
10
91°
65°
11
82°
63°
12
84°
58°
13
90°
59°
14
90°
60°
15
90°
69°
16
91°
69°
17
89°
75°
18
92°
78°
19
92°
66°
20
85°
68°
21
83°
65°
22
88°
72°
23
80°
69°
24
83°
66°
25
85°
68°
26
86°
69°
27
81°
69°
28
85°
70°
29
89°
69°
30
87°
70°
31
89°
72°
1
89°
71°
2
90°
71°
3
89°
72°
4
95°
75°
5
88°
73°
6
89°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mckinney Falls State Park
Mckinney Falls State Park's May 2026 forecast shows daily high temperatures ranging from 80° to 95°, with overnight lows between 66° and 75°. The average high for May is 87° with an average low of 71°. 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 Mckinney Falls State Park. See also: June | July | August.