S
M
T
W
T
F
S
26
100°
80°
27
101°
83°
28
94°
77°
29
89°
79°
30
83°
75°
31
89°
70°
1
84°
67°
2
87°
67°
3
88°
71°
4
92°
72°
5
84°
74°
6
83°
71°
7
90°
71°
8
92°
70°
9
96°
78°
10
95°
76°
11
97°
81°
12
94°
82°
13
99°
81°
14
92°
81°
15
88°
80°
16
88°
73°
17
86°
68°
18
88°
70°
19
75°
70°
20
86°
66°
21
94°
71°
22
85°
70°
23
79°
68°
24
83°
69°
25
88°
67°
26
91°
73°
27
85°
66°
28
88°
67°
29
98°
71°
30
100°
80°
31
101°
80°
1
100°
77°
2
99°
79°
3
98°
81°
4
98°
78°
5
99°
76°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mission
Mission's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August 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 August weather will actually feel in Mission. See also: September | October | November.