S
M
T
W
T
F
S
26
52°
37°
27
56°
31°
28
62°
27°
29
68°
26°
30
71°
27°
1
74°
30°
2
73°
36°
3
74°
47°
4
76°
38°
5
77°
38°
6
79°
38°
7
79°
38°
8
77°
38°
9
81°
34°
10
86°
36°
11
86°
39°
12
88°
38°
13
66°
39°
14
77°
28°
15
70°
29°
16
59°
38°
17
76°
44°
18
77°
46°
19
86°
49°
20
88°
46°
21
81°
47°
22
77°
47°
23
75°
49°
24
76°
50°
25
77°
49°
26
74°
50°
27
76°
51°
28
77°
50°
29
78°
49°
30
78°
49°
31
80°
48°
1
82°
53°
2
82°
53°
3
81°
52°
4
82°
53°
5
81°
53°
6
81°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Atascadero
Atascadero's May 2026 forecast shows daily high temperatures ranging from 74° to 88°, with overnight lows between 46° and 53°. The average high for May is 79° with an average low of 50°. 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 Atascadero. See also: June | July | August.
