Nalayh, Ulaanbaatar, Mongolia Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
September Air Quality Analysis
Nalayh, Ulaanbaatar, Mongolia
AQI Trends: Highest and Lowest
Same Day Analysis (28th September):
On this day, AQI across the 2 years varied significantly: 2026 ranks 2nd highest AQI at 27 of Good air quality, showing improvement over 2025 on the same day.
Day & Night AQI Trend: 27th Sep - 28th Sep 2026
Nalayh, Ulaanbaatar, Mongolia
6 AM27th Sep 2026
7 PM
5 AM28th Sep 2026
30AQI
21AQI
34AQI
21AQI
In the last 24 hours,
Nalayh's AQI reached its highest point of 34 at 3 AM during the Night, while the lowest point, 21, was recorded at 4 AM during the Night between 27th Sep and 28th Sep 2026.
Day & Night AQI Trend : Aug - Sep 2026
Nalayh, Ulaanbaatar, Mongolia
11°C5/17°C
13°C6/20°C
16°C10/23°C
18°C12/25°C
19°C11/26°C
11°C6/15°C
8°C5/15°C
7°C3/13°C
7°C2/13°C
8°C3/14°C
8°C5/13°C
10°C4/17°C
11°C7/16°C
7°C3/11°C
7°C1/14°C
11°C6/18°C
13°C7/20°C
15°C9/22°C
13°C9/19°C
7°C4/11°C
8°C4/14°C
9°C6/15°C
11°C7/17°C
8°C3/12°C
5°C2/11°C
3°C3/4°C
5°C2/8°C
5°C2/10°C
4°C-1/11°C
0°C-4/5°C
34AQI
29AQI
40AQI
33AQI
2026 Days Vs Air Quality
Nalayh, Ulaanbaatar, Mongolia
73%
195
20%
54
7%
19
Total number of days with different AQI categories in last 271 days in 2026 (94 days remaining)
Under WHO’s Safe Air Quality Limits: 73%
Health Risk Level:
Low
In 2026, 73% of 271 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Nalayh, Ulaanbaatar, Mongolia
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
46AQI (US)
55AQI (US)
44AQI (US)
47AQI (US)
58AQI (US)
50AQI (US)
53AQI (US)
45AQI (US)
46AQI (US)
28AQI (US)
43AQI (US)
42AQI (US)
103AQI (US)
93AQI (US)
50AQI (US)
85AQI (US)
89AQI (US)
38AQI (US)
54AQI (US)
126AQI (US)
126AQI (US)
115AQI (US)
113AQI (US)
126AQI (US)
63AQI (US)
110AQI (US)
112AQI (US)
111AQI (US)
98AQI (US)
107AQI (US)
126AQI (US)
138AQI (US)
143AQI (US)
140AQI (US)
111AQI (US)
56AQI (US)
62AQI (US)
92AQI (US)
86AQI (US)
103AQI (US)
95AQI (US)
103AQI (US)
109AQI (US)
88AQI (US)
32AQI (US)
58AQI (US)
83AQI (US)
89AQI (US)
82AQI (US)
93AQI (US)
104AQI (US)
29AQI (US)
37AQI (US)
70AQI (US)
61AQI (US)
25AQI (US)
45AQI (US)
58AQI (US)
46AQI (US)
61AQI (US)
35AQI (US)
30AQI (US)
50AQI (US)
74AQI (US)
47AQI (US)
43AQI (US)
44AQI (US)
30AQI (US)
40AQI (US)
54AQI (US)
40AQI (US)
34AQI (US)
46AQI (US)
38AQI (US)
42AQI (US)
23AQI (US)
42AQI (US)
42AQI (US)
52AQI (US)
42AQI (US)
30AQI (US)
52AQI (US)
39AQI (US)
46AQI (US)
37AQI (US)
54AQI (US)
50AQI (US)
40AQI (US)
53AQI (US)
31AQI (US)
42AQI (US)
49AQI (US)
38AQI (US)
52AQI (US)
35AQI (US)
42AQI (US)
40AQI (US)
34AQI (US)
46AQI (US)
40AQI (US)
47AQI (US)
26AQI (US)
53AQI (US)
50AQI (US)
27AQI (US)
42AQI (US)
51AQI (US)
44AQI (US)
42AQI (US)
47AQI (US)
54AQI (US)
45AQI (US)
51AQI (US)
21AQI (US)
23AQI (US)
40AQI (US)
54AQI (US)
30AQI (US)
35AQI (US)
40AQI (US)
49AQI (US)
48AQI (US)
36AQI (US)
39AQI (US)
40AQI (US)
45AQI (US)
40AQI (US)
50AQI (US)
51AQI (US)
56AQI (US)
32AQI (US)
38AQI (US)
71AQI (US)
72AQI (US)
70AQI (US)
70AQI (US)
80AQI (US)
90AQI (US)
90AQI (US)
75AQI (US)
70AQI (US)
72AQI (US)
48AQI (US)
22AQI (US)
27AQI (US)
40AQI (US)
51AQI (US)
18AQI (US)
13AQI (US)
17AQI (US)
19AQI (US)
26AQI (US)
27AQI (US)
25AQI (US)
33AQI (US)
22AQI (US)
27AQI (US)
33AQI (US)
50AQI (US)
35AQI (US)
28AQI (US)
24AQI (US)
41AQI (US)
32AQI (US)
27AQI (US)
38AQI (US)
40AQI (US)
28AQI (US)
22AQI (US)
28AQI (US)
31AQI (US)
25AQI (US)
25AQI (US)
20AQI (US)
34AQI (US)
28AQI (US)
25AQI (US)
35AQI (US)
25AQI (US)
26AQI (US)
31AQI (US)
40AQI (US)
34AQI (US)
24AQI (US)
33AQI (US)
32AQI (US)
54AQI (US)
28AQI (US)
18AQI (US)
28AQI (US)
30AQI (US)
30AQI (US)
27AQI (US)
35AQI (US)
31AQI (US)
34AQI (US)
39AQI (US)
29AQI (US)
28AQI (US)
26AQI (US)
30AQI (US)
33AQI (US)
31AQI (US)
35AQI (US)
38AQI (US)
31AQI (US)
36AQI (US)
24AQI (US)
34AQI (US)
34AQI (US)
46AQI (US)
46AQI (US)
53AQI (US)
39AQI (US)
27AQI (US)
29AQI (US)
39AQI (US)
51AQI (US)
46AQI (US)
26AQI (US)
27AQI (US)
31AQI (US)
25AQI (US)
28AQI (US)
29AQI (US)
31AQI (US)
37AQI (US)
31AQI (US)
32AQI (US)
29AQI (US)
31AQI (US)
47AQI (US)
54AQI (US)
38AQI (US)
26AQI (US)
41AQI (US)
42AQI (US)
32AQI (US)
24AQI (US)
31AQI (US)
27AQI (US)
37AQI (US)
52AQI (US)
42AQI (US)
49AQI (US)
47AQI (US)
25AQI (US)
25AQI (US)
25AQI (US)
27AQI (US)
30AQI (US)
39AQI (US)
26AQI (US)
23AQI (US)
33AQI (US)
32AQI (US)
35AQI (US)
40AQI (US)
43AQI (US)
31AQI (US)
37AQI (US)
37AQI (US)
41AQI (US)
35AQI (US)
34AQI (US)
25AQI (US)
23AQI (US)
27AQI (US)
77AQI (US)
80AQI (US)
43AQI (US)
42AQI (US)
52AQI (US)
29AQI (US)
31AQI (US)
36AQI (US)
34AQI (US)
No. of days
202647AQI (US)
Highest AQI (US) recorded in
February80AQI (US)
Lowest AQI (US) recorded in
June29AQI (US)
202553AQI (US)
Highest AQI (US) recorded in
October70AQI (US)
Lowest AQI (US) recorded in
August45AQI (US)
Most & Least Polluted Years Over the Last 2 Years
Nalayh's annual 2026 AQI (US) (47) shows an average percentage change of -11.3% (improved AQI (US)) compared to previous years: 2025 (53).