S
M
T
W
T
F
S
26
76°
68°
27
75°
68°
28
78°
67°
29
77°
69°
30
78°
68°
31
78°
68°
1
79°
68°
2
Hist. Avg.
76°
67°
3
Hist. Avg.
76°
67°
4
Hist. Avg.
76°
67°
5
Hist. Avg.
77°
67°
6
Hist. Avg.
77°
67°
7
Hist. Avg.
77°
67°
8
Hist. Avg.
77°
68°
9
Hist. Avg.
77°
68°
10
Hist. Avg.
77°
68°
11
Hist. Avg.
77°
68°
12
Hist. Avg.
77°
68°
13
Hist. Avg.
77°
68°
14
Hist. Avg.
77°
68°
15
Hist. Avg.
77°
68°
16
Hist. Avg.
77°
68°
17
Hist. Avg.
77°
68°
18
Hist. Avg.
78°
68°
19
Hist. Avg.
78°
68°
20
Hist. Avg.
78°
68°
21
Hist. Avg.
78°
68°
22
Hist. Avg.
78°
68°
23
Hist. Avg.
78°
68°
24
Hist. Avg.
78°
68°
25
Hist. Avg.
78°
68°
26
Hist. Avg.
78°
68°
27
Hist. Avg.
78°
68°
28
Hist. Avg.
78°
68°
29
Hist. Avg.
78°
68°
30
Hist. Avg.
78°
68°
31
Hist. Avg.
78°
67°
1
Hist. Avg.
78°
67°
2
Hist. Avg.
78°
67°
3
Hist. Avg.
78°
67°
4
Hist. Avg.
78°
67°
5
Hist. Avg.
78°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in National City
National City's August 2026 forecast shows daily high temperatures ranging from 75° to 79°, with overnight lows between 67° and 69°. The average high for August is 77° with an average low of 68°. 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 National City. See also: September | October | November.
