S
M
T
W
T
F
S
26
90°
67°
27
74°
63°
28
84°
63°
29
71°
63°
30
69°
58°
31
81°
55°
1
79°
57°
2
74°
55°
3
79°
56°
4
81°
59°
5
79°
60°
6
83°
58°
7
81°
63°
8
87°
66°
9
72°
58°
10
64°
41°
11
75°
45°
12
79°
53°
13
82°
59°
14
68°
50°
15
67°
46°
16
70°
47°
17
77°
56°
18
73°
53°
19
75°
54°
20
81°
56°
21
80°
54°
22
81°
56°
23
74°
51°
24
73°
51°
25
72°
43°
26
64°
42°
27
64°
46°
28
65°
41°
29
70°
46°
30
73°
49°
31
73°
48°
1
71°
46°
2
70°
41°
3
62°
38°
4
61°
37°
5
61°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Ulan Bator
Ulan Bator's August 2026 forecast shows daily high temperatures ranging from 61° to 82°, with overnight lows between 36° and 59°. The average high for August is 71° with an average low of 48°. 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 Ulan Bator. See also: September | October | November.