S
M
T
W
T
F
S
26
63°
51°
27
66°
43°
28
74°
44°
29
75°
46°
30
78°
49°
1
74°
51°
2
59°
52°
3
64°
53°
4
66°
48°
5
60°
51°
6
71°
50°
7
80°
53°
8
73°
49°
9
76°
51°
10
80°
52°
11
89°
47°
12
77°
51°
13
70°
53°
14
84°
48°
15
84°
47°
16
73°
48°
17
76°
47°
18
82°
59°
19
88°
45°
20
85°
51°
21
92°
51°
22
81°
51°
23
70°
54°
24
71°
54°
25
67°
54°
26
68°
51°
27
69°
47°
28
68°
52°
29
64°
55°
30
72°
50°
31
86°
48°
1
91°
49°
2
80°
50°
3
78°
52°
4
87°
53°
5
90°
54°
6
71°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Walnut Creek
Walnut Creek's May 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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 Walnut Creek. See also: June | July | August.
