S
M
T
W
T
F
S
26
67°
61°
27
69°
59°
28
69°
57°
29
75°
55°
30
76°
54°
31
80°
59°
1
74°
59°
2
72°
57°
3
69°
57°
4
71°
47°
5
71°
48°
6
76°
63°
7
72°
56°
8
68°
50°
9
71°
57°
10
73°
57°
11
64°
55°
12
64°
49°
13
67°
47°
14
69°
48°
15
74°
59°
16
71°
59°
17
73°
57°
18
68°
51°
19
69°
49°
20
64°
44°
21
71°
52°
22
65°
54°
23
60°
57°
24
65°
55°
25
66°
50°
26
N/A
27
70°
48°
28
68°
51°
29
67°
58°
30
67°
57°
31
69°
56°
1
67°
53°
2
64°
50°
3
65°
49°
4
64°
49°
5
64°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Lahti
Lahti's August 2026 forecast shows daily high temperatures ranging from 64° to 70°, with overnight lows between 48° and 58°. The average high for August is 67° with an average low of 52°. 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 Lahti. See also: September | October | November.