S
M
T
W
T
F
S
26
63°
39°
27
61°
41°
28
70°
39°
29
77°
39°
30
81°
39°
1
81°
45°
2
77°
50°
3
77°
48°
4
68°
55°
5
79°
52°
6
84°
54°
7
86°
46°
8
82°
45°
9
90°
45°
10
88°
48°
11
91°
48°
12
88°
52°
13
69°
47°
14
79°
43°
15
74°
43°
16
69°
38°
17
71°
39°
18
76°
43°
19
83°
42°
20
90°
48°
21
91°
48°
22
88°
49°
23
86°
47°
24
80°
42°
25
75°
41°
26
76°
42°
27
77°
44°
28
80°
43°
29
74°
44°
30
75°
43°
31
81°
47°
1
83°
48°
2
84°
48°
3
82°
46°
4
75°
41°
5
76°
41°
6
77°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Junction City
Junction City's May 2026 forecast shows daily high temperatures ranging from 69° to 91°, with overnight lows between 38° and 49°. The average high for May is 79° 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 Junction City. See also: June | July | August.