S
M
T
W
T
F
S
26
67°
50°
27
62°
46°
28
53°
41°
29
64°
37°
30
62°
40°
1
63°
33°
2
70°
32°
3
78°
51°
4
86°
47°
5
59°
47°
6
62°
40°
7
77°
44°
8
77°
53°
9
85°
42°
10
75°
49°
11
84°
47°
12
85°
54°
13
81°
44°
14
83°
57°
15
94°
58°
16
91°
63°
17
87°
62°
18
69°
52°
19
59°
42°
20
64°
49°
21
60°
53°
22
65°
52°
23
73°
52°
24
78°
54°
25
80°
59°
26
80°
59°
27
77°
58°
28
80°
60°
29
79°
60°
30
78°
61°
31
77°
58°
1
78°
56°
2
77°
59°
3
73°
56°
4
75°
60°
5
79°
62°
6
82°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Firth
Firth's May 2026 forecast shows daily high temperatures ranging from 59° to 82°, with overnight lows between 42° and 62°. The average high for May is 74° with an average low of 56°. 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 Firth. See also: June | July | August.
