S
M
T
W
T
F
S
26
62°
36°
27
72°
35°
28
70°
50°
29
64°
52°
30
52°
42°
1
54°
34°
2
46°
36°
3
54°
35°
4
73°
42°
5
76°
49°
6
49°
43°
7
55°
35°
8
53°
36°
9
56°
36°
10
58°
36°
11
54°
30°
12
59°
30°
13
60°
43°
14
54°
44°
15
59°
43°
16
79°
40°
17
81°
57°
18
90°
60°
19
86°
64°
20
76°
48°
21
63°
44°
22
64°
37°
23
58°
48°
24
54°
46°
25
67°
52°
26
N/A
27
77°
50°
28
66°
46°
29
69°
49°
30
61°
40°
31
69°
45°
1
68°
46°
2
73°
46°
3
76°
50°
4
75°
53°
5
78°
54°
6
76°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Herkimer
Herkimer's May 2026 forecast shows daily high temperatures ranging from 61° to 78°, with overnight lows between 40° and 54°. The average high for May is 72° with an average low of 48°. 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 Herkimer. See also: June | July | August.
