S
M
T
W
T
F
S
26
67°
54°
27
67°
54°
28
68°
52°
29
68°
57°
30
69°
56°
31
69°
54°
1
72°
57°
2
68°
57°
3
70°
56°
4
70°
57°
5
72°
56°
6
72°
54°
7
71°
56°
8
69°
54°
9
68°
52°
10
69°
56°
11
70°
58°
12
72°
57°
13
72°
57°
14
73°
56°
15
74°
58°
16
74°
57°
17
72°
56°
18
68°
55°
19
71°
56°
20
72°
56°
21
72°
55°
22
69°
52°
23
68°
56°
24
68°
54°
25
67°
52°
26
67°
52°
27
68°
53°
28
67°
53°
29
66°
55°
30
66°
54°
31
67°
50°
1
66°
51°
2
65°
54°
3
65°
49°
4
69°
49°
5
65°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Hartford
Hartford's August 2026 forecast shows daily high temperatures ranging from 65° to 74°, with overnight lows between 49° and 58°. The average high for August is 69° with an average low of 54°. 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 Hartford. See also: September | October | November.