S
M
T
W
T
F
S
26
85°
62°
27
85°
72°
28
83°
66°
29
69°
60°
30
66°
54°
1
66°
51°
2
71°
45°
3
75°
45°
4
81°
58°
5
72°
60°
6
72°
50°
7
68°
51°
8
75°
50°
9
82°
56°
10
81°
59°
11
76°
55°
12
81°
50°
13
84°
54°
14
78°
51°
15
86°
61°
16
85°
67°
17
90°
71°
18
87°
73°
19
87°
67°
20
74°
62°
21
74°
63°
22
80°
65°
23
82°
68°
24
81°
67°
25
81°
67°
26
86°
68°
27
86°
68°
28
85°
67°
29
84°
66°
30
87°
70°
31
88°
71°
1
89°
71°
2
88°
70°
3
87°
69°
4
82°
65°
5
85°
67°
6
89°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Thompson Grove
Thompson Grove's May 2026 forecast shows daily high temperatures ranging from 74° to 90°, with overnight lows between 62° and 73°. The average high for May is 84° with an average low of 68°. 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 Thompson Grove. See also: June | July | August.