Chillan, Biobio, Chile Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
June Air Quality Analysis
Chillan, Biobio, Chile
AQI Trends: Highest and Lowest
Same Day Analysis (2nd June):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 91 of Moderate air quality, showing improvement over 2025, 2024 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 1st Jun - 2nd Jun 2026
Chillan, Biobio, Chile
7 AM1st Jun 2026
5 PM
6 AM2nd Jun 2026
64AQI
35AQI
115AQI
51AQI
In the last 24 hours,
Chillan's AQI reached its highest point of 115 at 12 AM during the Night, while the lowest point, 35, was recorded at 3 PM during the Day between 1st Jun and 2nd Jun 2026.
Day & Night AQI Trend : May - Jun 2026
Chillan, Biobio, Chile
13°C11/15°C
15°C12/19°C
13°C10/15°C
10°C6/13°C
9°C6/13°C
9°C3/18°C
10°C4/20°C
12°C7/21°C
13°C7/21°C
13°C8/21°C
11°C5/19°C
10°C7/17°C
9°C4/17°C
9°C2/18°C
11°C5/20°C
12°C5/22°C
12°C6/22°C
12°C6/20°C
10°C5/18°C
9°C5/14°C
9°C5/14°C
12°C6/21°C
13°C8/21°C
13°C8/18°C
14°C11/20°C
12°C9/19°C
12°C6/21°C
14°C10/21°C
11°C7/16°C
14°C9/19°C
60AQI
45AQI
66AQI
46AQI
2026 Days Vs Air Quality
Chillan, Biobio, Chile
84%
126
15%
22
1%
2
Total number of days with different AQI categories in last 154 days in 2026 (211 days remaining)
Under WHO’s Safe Air Quality Limits: 84%
Health Risk Level:
Low
In 2026, 84% of 154 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
Chillan, Biobio, Chile
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
23AQI (US)
26AQI (US)
30AQI (US)
34AQI (US)
24AQI (US)
24AQI (US)
28AQI (US)
42AQI (US)
32AQI (US)
28AQI (US)
20AQI (US)
21AQI (US)
17AQI (US)
50AQI (US)
53AQI (US)
22AQI (US)
30AQI (US)
33AQI (US)
90AQI (US)
146AQI (US)
100AQI (US)
52AQI (US)
56AQI (US)
46AQI (US)
48AQI (US)
45AQI (US)
39AQI (US)
42AQI (US)
43AQI (US)
51AQI (US)
42AQI (US)
44AQI (US)
54AQI (US)
50AQI (US)
49AQI (US)
47AQI (US)
44AQI (US)
42AQI (US)
45AQI (US)
46AQI (US)
42AQI (US)
42AQI (US)
42AQI (US)
49AQI (US)
50AQI (US)
42AQI (US)
46AQI (US)
46AQI (US)
46AQI (US)
50AQI (US)
42AQI (US)
38AQI (US)
34AQI (US)
39AQI (US)
43AQI (US)
44AQI (US)
32AQI (US)
34AQI (US)
34AQI (US)
38AQI (US)
50AQI (US)
44AQI (US)
41AQI (US)
38AQI (US)
29AQI (US)
32AQI (US)
36AQI (US)
37AQI (US)
31AQI (US)
35AQI (US)
40AQI (US)
39AQI (US)
36AQI (US)
30AQI (US)
36AQI (US)
35AQI (US)
32AQI (US)
32AQI (US)
34AQI (US)
32AQI (US)
33AQI (US)
38AQI (US)
35AQI (US)
32AQI (US)
30AQI (US)
32AQI (US)
32AQI (US)
28AQI (US)
28AQI (US)
28AQI (US)
29AQI (US)
32AQI (US)
29AQI (US)
28AQI (US)
30AQI (US)
36AQI (US)
30AQI (US)
37AQI (US)
30AQI (US)
35AQI (US)
36AQI (US)
31AQI (US)
29AQI (US)
32AQI (US)
30AQI (US)
32AQI (US)
32AQI (US)
34AQI (US)
33AQI (US)
27AQI (US)
24AQI (US)
27AQI (US)
30AQI (US)
34AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
26AQI (US)
28AQI (US)
26AQI (US)
26AQI (US)
30AQI (US)
34AQI (US)
34AQI (US)
30AQI (US)
28AQI (US)
32AQI (US)
34AQI (US)
36AQI (US)
36AQI (US)
30AQI (US)
52AQI (US)
54AQI (US)
42AQI (US)
40AQI (US)
53AQI (US)
56AQI (US)
48AQI (US)
53AQI (US)
58AQI (US)
58AQI (US)
72AQI (US)
108AQI (US)
95AQI (US)
72AQI (US)
74AQI (US)
97AQI (US)
86AQI (US)
63AQI (US)
91AQI (US)
43AQI (US)
43AQI (US)
35AQI (US)
31AQI (US)
51AQI (US)
77AQI (US)
No. of days
202641AQI (US)
Highest AQI (US) recorded in
June77AQI (US)
Lowest AQI (US) recorded in
April31AQI (US)
202556AQI (US)
Highest AQI (US) recorded in
June107AQI (US)
Lowest AQI (US) recorded in
December28AQI (US)
202459AQI (US)
Highest AQI (US) recorded in
May118AQI (US)
Lowest AQI (US) recorded in
November27AQI (US)
202361AQI (US)
Highest AQI (US) recorded in
February93AQI (US)
Lowest AQI (US) recorded in
January27AQI (US)
202256AQI (US)
Highest AQI (US) recorded in
May100AQI (US)
Lowest AQI (US) recorded in
December26AQI (US)
202169AQI (US)
Highest AQI (US) recorded in
May125AQI (US)
Lowest AQI (US) recorded in
January32AQI (US)
202061AQI (US)
Highest AQI (US) recorded in
July106AQI (US)
Lowest AQI (US) recorded in
December27AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Chillan's annual 2026 AQI (US) (41) shows an average percentage change of -31.7% (improved AQI (US)) compared to previous years: 2020 (61), 2021 (69), 2022 (56), 2023 (61), 2024 (59), 2025 (56).