S
M
T
W
T
F
S
26
91°
69°
27
91°
68°
28
90°
69°
29
90°
69°
30
85°
68°
31
86°
68°
1
84°
67°
2
85°
67°
3
85°
68°
4
86°
63°
5
85°
63°
6
84°
62°
7
85°
62°
8
86°
68°
9
83°
68°
10
84°
67°
11
84°
66°
12
85°
64°
13
85°
65°
14
86°
65°
15
86°
67°
16
85°
68°
17
90°
67°
18
89°
67°
19
88°
66°
20
89°
65°
21
84°
58°
22
82°
58°
23
83°
59°
24
85°
60°
25
84°
59°
26
90°
63°
27
91°
65°
28
91°
65°
29
89°
64°
30
90°
58°
31
87°
58°
1
84°
63°
2
89°
60°
3
89°
63°
4
88°
64°
5
90°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Celina
Celina's August 2026 forecast shows daily high temperatures ranging from 82° to 91°, with overnight lows between 58° and 69°. The average high for August is 87° with an average low of 64°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Celina. See also: September | October | November.