S
M
T
W
T
F
S
26
66°
47°
27
65°
50°
28
60°
51°
29
61°
39°
30
59°
34°
1
54°
39°
2
55°
31°
3
61°
38°
4
75°
47°
5
57°
47°
6
58°
38°
7
59°
35°
8
63°
47°
9
75°
50°
10
67°
48°
11
68°
41°
12
80°
40°
13
63°
40°
14
68°
37°
15
71°
58°
16
74°
60°
17
83°
63°
18
84°
68°
19
79°
57°
20
68°
50°
21
69°
50°
22
71°
51°
23
78°
58°
24
78°
58°
25
77°
62°
26
78°
60°
27
79°
60°
28
78°
55°
29
78°
59°
30
73°
56°
31
72°
54°
1
73°
52°
2
72°
51°
3
73°
54°
4
75°
61°
5
82°
63°
6
83°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Pittsburg
Pittsburg's May 2026 forecast shows daily high temperatures ranging from 68° to 84°, with overnight lows between 50° and 68°. The average high for May is 76° with an average low of 58°. 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 Pittsburg. See also: June | July | August.