S
M
T
W
T
F
S
26
64°
52°
27
65°
53°
28
74°
46°
29
78°
51°
30
76°
55°
1
80°
57°
2
82°
56°
3
69°
57°
4
66°
55°
5
69°
51°
6
79°
55°
7
88°
56°
8
89°
57°
9
92°
61°
10
93°
60°
11
96°
60°
12
89°
61°
13
82°
59°
14
81°
56°
15
82°
57°
16
79°
58°
17
78°
56°
18
82°
55°
19
85°
60°
20
84°
60°
21
85°
59°
22
85°
60°
23
86°
60°
24
86°
59°
25
85°
60°
26
85°
60°
27
84°
57°
28
78°
56°
29
77°
55°
30
78°
56°
31
79°
58°
1
79°
59°
2
81°
58°
3
80°
58°
4
80°
57°
5
82°
57°
6
81°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grand Terrace
Grand Terrace's May 2026 forecast shows daily high temperatures ranging from 69° to 96°, with overnight lows between 51° and 61°. The average high for May is 83° with an average low of 58°. 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 Grand Terrace. See also: June | July | August.
