S
M
T
W
T
F
S
26
66°
49°
27
69°
46°
28
75°
49°
29
80°
55°
30
84°
57°
1
85°
62°
2
86°
60°
3
85°
58°
4
71°
53°
5
71°
51°
6
82°
53°
7
92°
62°
8
96°
69°
9
95°
68°
10
99°
72°
11
100°
73°
12
102°
74°
13
90°
67°
14
94°
63°
15
96°
63°
16
90°
59°
17
88°
60°
18
82°
54°
19
87°
58°
20
91°
58°
21
93°
59°
22
92°
63°
23
90°
62°
24
88°
59°
25
90°
61°
26
89°
60°
27
98°
63°
28
87°
59°
29
88°
59°
30
91°
62°
31
95°
66°
1
98°
68°
2
98°
69°
3
99°
70°
4
98°
63°
5
91°
65°
6
94°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fort Irwin
Fort Irwin's May 2026 forecast shows daily high temperatures ranging from 82° to 99°, with overnight lows between 54° and 70°. The average high for May is 92° with an average low of 62°. 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 Fort Irwin. See also: June | July | August.
