S
M
T
W
T
F
S
26
75°
56°
27
72°
50°
28
61°
44°
29
64°
41°
30
68°
39°
1
67°
33°
2
66°
34°
3
80°
49°
4
89°
50°
5
59°
50°
6
62°
44°
7
74°
41°
8
66°
48°
9
89°
43°
10
73°
52°
11
84°
46°
12
87°
56°
13
81°
46°
14
83°
50°
15
94°
63°
16
91°
64°
17
84°
64°
18
79°
52°
19
65°
48°
20
65°
53°
21
60°
58°
22
70°
54°
23
74°
56°
24
79°
59°
25
81°
61°
26
78°
64°
27
83°
64°
28
81°
62°
29
80°
60°
30
80°
61°
31
79°
58°
1
83°
63°
2
82°
63°
3
75°
58°
4
76°
58°
5
81°
64°
6
81°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Fillmore
Fillmore's May 2026 forecast shows daily high temperatures ranging from 60° to 83°, with overnight lows between 48° and 64°. The average high for May is 77° with an average low of 59°. 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 Fillmore. See also: June | July | August.