S
M
T
W
T
F
S
26
37°
32°
27
45°
32°
28
50°
36°
29
60°
41°
30
65°
47°
1
67°
49°
2
63°
51°
3
74°
44°
4
60°
43°
5
71°
45°
6
80°
48°
7
78°
48°
8
75°
42°
9
80°
43°
10
83°
46°
11
85°
49°
12
83°
49°
13
86°
48°
14
83°
47°
15
77°
43°
16
67°
37°
17
71°
41°
18
70°
38°
19
70°
42°
20
72°
42°
21
72°
41°
22
71°
42°
23
72°
43°
24
73°
44°
25
74°
44°
26
74°
43°
27
73°
43°
28
72°
42°
29
70°
43°
30
70°
43°
31
71°
44°
1
73°
44°
2
75°
45°
3
75°
45°
4
74°
44°
5
75°
45°
6
72°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Black Forest
Black Forest's May 2026 forecast shows daily high temperatures ranging from 60° to 86°, with overnight lows between 37° and 49°. The average high for May is 74° with an average low of 44°. 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 Black Forest. See also: June | July | August.