S
M
T
W
T
F
S
26
63°
30°
27
63°
36°
28
64°
34°
29
68°
32°
30
75°
36°
1
81°
41°
2
73°
48°
3
82°
45°
4
82°
46°
5
81°
46°
6
82°
52°
7
81°
45°
8
75°
43°
9
82°
37°
10
79°
45°
11
79°
39°
12
90°
46°
13
63°
41°
14
73°
32°
15
68°
37°
16
57°
37°
17
59°
34°
18
68°
37°
19
73°
37°
20
73°
39°
21
77°
43°
22
82°
43°
23
77°
36°
24
77°
45°
25
75°
36°
26
51°
35°
27
57°
40°
28
70°
40°
29
66°
36°
30
65°
35°
31
61°
31°
1
70°
36°
2
78°
40°
3
76°
38°
4
76°
39°
5
81°
48°
6
71°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Three Rivers
Three Rivers's May 2026 forecast shows daily high temperatures ranging from 51° to 81°, with overnight lows between 31° and 48°. The average high for May is 70° with an average low of 38°. 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 Three Rivers. See also: June | July | August.