Olgii, Bayan Olgii, 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
Olgii, Bayan Olgii, Mongolia
AQI Trends: Highest and Lowest
Same Day Analysis (29th September):
On this day, AQI across the 4 years varied significantly: 2026 ranks 2nd highest AQI at 22 of Good air quality, showing improvement over 2025 on the same day.
Day & Night AQI Trend: 29th Sep - 30th Sep 2026
Olgii, Bayan Olgii, Mongolia
6 AM29th Sep 2026
7 PM
5 AM30th Sep 2026
29AQI
12AQI
38AQI
17AQI
In the last 24 hours,
Olgii's AQI reached its highest point of 38 at 3 AM during the Night, while the lowest point, 12, was recorded at 7 AM during the Day between 29th Sep and 30th Sep 2026.
Day & Night AQI Trend : Sep 2026
Olgii, Bayan Olgii, Mongolia
12°C8/16°C
9°C4/15°C
6°C0/10°C
7°C2/13°C
9°C4/14°C
10°C5/15°C
11°C6/15°C
12°C8/17°C
12°C7/17°C
13°C9/18°C
13°C8/19°C
15°C9/21°C
16°C10/22°C
16°C11/22°C
15°C10/20°C
12°C7/16°C
8°C4/12°C
8°C3/14°C
11°C5/18°C
11°C6/18°C
12°C7/17°C
10°C5/15°C
8°C6/12°C
6°C3/11°C
7°C3/11°C
7°C3/11°C
8°C3/14°C
2°C0/5°C
2°C-3/7°C
5°C-1/11°C
23AQI
18AQI
30AQI
21AQI
2026 Days Vs Air Quality
Olgii, Bayan Olgii, Mongolia
89%
239
11%
29
0.3%
1
Total number of days with different AQI categories in last 273 days in 2026 (92 days remaining)
Under WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2026, 89% of 273 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
Olgii, Bayan Olgii, Mongolia
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
31AQI (US)
23AQI (US)
27AQI (US)
20AQI (US)
38AQI (US)
60AQI (US)
51AQI (US)
48AQI (US)
31AQI (US)
30AQI (US)
34AQI (US)
75AQI (US)
112AQI (US)
62AQI (US)
53AQI (US)
24AQI (US)
32AQI (US)
31AQI (US)
34AQI (US)
56AQI (US)
63AQI (US)
67AQI (US)
84AQI (US)
70AQI (US)
57AQI (US)
60AQI (US)
61AQI (US)
72AQI (US)
92AQI (US)
62AQI (US)
41AQI (US)
55AQI (US)
72AQI (US)
41AQI (US)
42AQI (US)
60AQI (US)
51AQI (US)
31AQI (US)
53AQI (US)
47AQI (US)
35AQI (US)
42AQI (US)
48AQI (US)
41AQI (US)
26AQI (US)
29AQI (US)
34AQI (US)
37AQI (US)
37AQI (US)
57AQI (US)
71AQI (US)
31AQI (US)
21AQI (US)
26AQI (US)
29AQI (US)
27AQI (US)
32AQI (US)
42AQI (US)
43AQI (US)
40AQI (US)
30AQI (US)
27AQI (US)
26AQI (US)
29AQI (US)
44AQI (US)
56AQI (US)
53AQI (US)
59AQI (US)
50AQI (US)
18AQI (US)
22AQI (US)
23AQI (US)
27AQI (US)
22AQI (US)
39AQI (US)
27AQI (US)
32AQI (US)
30AQI (US)
34AQI (US)
24AQI (US)
29AQI (US)
32AQI (US)
38AQI (US)
20AQI (US)
17AQI (US)
24AQI (US)
30AQI (US)
29AQI (US)
17AQI (US)
26AQI (US)
24AQI (US)
25AQI (US)
26AQI (US)
20AQI (US)
22AQI (US)
25AQI (US)
20AQI (US)
21AQI (US)
17AQI (US)
18AQI (US)
24AQI (US)
25AQI (US)
21AQI (US)
24AQI (US)
32AQI (US)
22AQI (US)
17AQI (US)
18AQI (US)
19AQI (US)
21AQI (US)
27AQI (US)
29AQI (US)
20AQI (US)
19AQI (US)
17AQI (US)
22AQI (US)
24AQI (US)
20AQI (US)
19AQI (US)
20AQI (US)
20AQI (US)
23AQI (US)
28AQI (US)
20AQI (US)
20AQI (US)
25AQI (US)
23AQI (US)
19AQI (US)
18AQI (US)
17AQI (US)
17AQI (US)
16AQI (US)
36AQI (US)
43AQI (US)
56AQI (US)
56AQI (US)
57AQI (US)
48AQI (US)
39AQI (US)
33AQI (US)
37AQI (US)
28AQI (US)
39AQI (US)
16AQI (US)
18AQI (US)
27AQI (US)
16AQI (US)
22AQI (US)
22AQI (US)
17AQI (US)
24AQI (US)
21AQI (US)
21AQI (US)
22AQI (US)
25AQI (US)
24AQI (US)
22AQI (US)
28AQI (US)
24AQI (US)
26AQI (US)
22AQI (US)
18AQI (US)
18AQI (US)
26AQI (US)
33AQI (US)
19AQI (US)
15AQI (US)
21AQI (US)
25AQI (US)
18AQI (US)
26AQI (US)
36AQI (US)
21AQI (US)
18AQI (US)
27AQI (US)
27AQI (US)
27AQI (US)
24AQI (US)
28AQI (US)
23AQI (US)
19AQI (US)
24AQI (US)
22AQI (US)
19AQI (US)
18AQI (US)
20AQI (US)
31AQI (US)
25AQI (US)
24AQI (US)
22AQI (US)
18AQI (US)
21AQI (US)
23AQI (US)
19AQI (US)
18AQI (US)
24AQI (US)
26AQI (US)
21AQI (US)
24AQI (US)
28AQI (US)
19AQI (US)
22AQI (US)
21AQI (US)
23AQI (US)
20AQI (US)
22AQI (US)
18AQI (US)
17AQI (US)
21AQI (US)
20AQI (US)
24AQI (US)
22AQI (US)
26AQI (US)
28AQI (US)
19AQI (US)
18AQI (US)
18AQI (US)
21AQI (US)
21AQI (US)
25AQI (US)
19AQI (US)
20AQI (US)
22AQI (US)
20AQI (US)
20AQI (US)
20AQI (US)
18AQI (US)
24AQI (US)
22AQI (US)
22AQI (US)
21AQI (US)
24AQI (US)
20AQI (US)
21AQI (US)
18AQI (US)
24AQI (US)
24AQI (US)
24AQI (US)
28AQI (US)
26AQI (US)
29AQI (US)
18AQI (US)
19AQI (US)
19AQI (US)
19AQI (US)
19AQI (US)
22AQI (US)
24AQI (US)
27AQI (US)
21AQI (US)
22AQI (US)
23AQI (US)
24AQI (US)
23AQI (US)
23AQI (US)
21AQI (US)
18AQI (US)
21AQI (US)
23AQI (US)
25AQI (US)
24AQI (US)
22AQI (US)
20AQI (US)
25AQI (US)
22AQI (US)
22AQI (US)
21AQI (US)
21AQI (US)
22AQI (US)
52AQI (US)
41AQI (US)
31AQI (US)
22AQI (US)
29AQI (US)
23AQI (US)
22AQI (US)
22AQI (US)
22AQI (US)
No. of days
202629AQI (US)
Highest AQI (US) recorded in
January52AQI (US)
Lowest AQI (US) recorded in
September22AQI (US)
202567AQI (US)
Highest AQI (US) recorded in
January152AQI (US)
Lowest AQI (US) recorded in
November34AQI (US)
202462AQI (US)
Highest AQI (US) recorded in
December155AQI (US)
Lowest AQI (US) recorded in
October13AQI (US)
202384AQI (US)
Highest AQI (US) recorded in
February186AQI (US)
Lowest AQI (US) recorded in
September0AQI (US)
2022143AQI (US)
Highest AQI (US) recorded in
December173AQI (US)
Lowest AQI (US) recorded in
October107AQI (US)
Most & Least Polluted Years Over the Last 5 Years
Olgii's annual 2026 AQI (US) (29) shows an average percentage change of -63.7% (improved AQI (US)) compared to previous years: 2022 (143), 2023 (84), 2024 (62), 2025 (67).