S
M
T
W
T
F
S
26
57°
38°
27
69°
30°
28
51°
47°
29
52°
41°
30
43°
34°
1
41°
28°
2
41°
29°
3
53°
25°
4
69°
41°
5
68°
50°
6
54°
39°
7
53°
28°
8
57°
28°
9
60°
45°
10
58°
32°
11
56°
28°
12
63°
25°
13
63°
40°
14
42°
39°
15
63°
38°
16
72°
37°
17
78°
60°
18
86°
61°
19
81°
61°
20
65°
40°
21
64°
38°
22
61°
46°
23
49°
45°
24
61°
52°
25
68°
51°
26
74°
52°
27
73°
52°
28
72°
54°
29
71°
54°
30
72°
55°
31
74°
55°
1
74°
54°
2
75°
48°
3
75°
53°
4
74°
54°
5
75°
54°
6
73°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Dallas City
Dallas City's May 2026 forecast shows daily high temperatures ranging from 49° to 75°, with overnight lows between 38° and 55°. The average high for May is 69° with an average low of 51°. 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 Dallas City. See also: June | July | August.