San Fernando, Libertador General Bernardo O Higgins, Chile Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
San Fernando, Libertador General Bernardo O Higgins, Chile
AQI Trends: Highest and Lowest
Same Day Analysis (6th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 53 of Moderate air quality, showing improvement over 2023 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 6th Oct - 7th Oct 2025
San Fernando, Libertador General Bernardo O Higgins, Chile
7 AM6th Oct 2025
7 PM
6 AM7th Oct 2025
51AQI
34AQI
AQI
AQI
In the last 24 hours,
San Fernando's AQI reached its highest point of 51 at 2 PM during the Day, while the lowest point, undefined, was recorded at 6 AM during the Night between 6th Oct and 7th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
San Fernando, Libertador General Bernardo O Higgins, Chile
12°C8/18°C
15°C9/22°C
23°C16/31°C
18°C12/27°C
18°C11/27°C
16°C10/22°C
16°C9/25°C
19°C11/27°C
18°C11/26°C
16°C9/24°C
17°C9/27°C
19°C12/27°C
19°C13/28°C
18°C13/26°C
17°C9/25°C
19°C10/28°C
18°C11/26°C
20°C12/29°C
18°C11/24°C
16°C11/24°C
20°C11/31°C
19°C13/26°C
16°C9/24°C
17°C9/26°C
17°C9/27°C
19°C12/28°C
17°C11/24°C
16°C11/23°C
17°C8/26°C
19°C11/27°C
--°C/°C
47AQI
43AQI
45AQI
45AQI
2025 Days Vs Air Quality
San Fernando, Libertador General Bernardo O Higgins, Chile
29%
81
51%
142
17%
47
3%
9
Total number of days with different AQI categories in last 280 days in 2025 (85 days remaining)
Under WHO’s Safe Air Quality Limits: 29%
Health Risk Level:
Very high
In 2025, 29% of 280 days were within WHO’s safe air quality limits. The risk of health issues is Very high, including respiratory issues, heart disease, and stress, particularly affecting vulnerable groups.
Annual Air Quality Insights
San Fernando, Libertador General Bernardo O Higgins, Chile
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
39AQI
38AQI
46AQI
43AQI
45AQI
38AQI
35AQI
32AQI
36AQI
43AQI
43AQI
42AQI
33AQI
37AQI
33AQI
27AQI
35AQI
33AQI
38AQI
47AQI
46AQI
42AQI
37AQI
52AQI
46AQI
61AQI
41AQI
43AQI
55AQI
51AQI
47AQI
46AQI
43AQI
34AQI
41AQI
34AQI
38AQI
53AQI
61AQI
70AQI
54AQI
72AQI
63AQI
58AQI
48AQI
38AQI
40AQI
41AQI
50AQI
55AQI
50AQI
44AQI
48AQI
38AQI
34AQI
42AQI
51AQI
57AQI
35AQI
29AQI
28AQI
29AQI
40AQI
39AQI
32AQI
30AQI
32AQI
39AQI
41AQI
53AQI
55AQI
58AQI
51AQI
47AQI
49AQI
50AQI
53AQI
53AQI
52AQI
53AQI
51AQI
65AQI
62AQI
55AQI
66AQI
60AQI
61AQI
62AQI
33AQI
46AQI
52AQI
59AQI
53AQI
59AQI
56AQI
53AQI
53AQI
65AQI
75AQI
55AQI
46AQI
58AQI
64AQI
53AQI
53AQI
57AQI
60AQI
62AQI
71AQI
69AQI
82AQI
80AQI
77AQI
52AQI
47AQI
62AQI
61AQI
58AQI
66AQI
67AQI
80AQI
72AQI
93AQI
80AQI
75AQI
97AQI
101AQI
55AQI
58AQI
72AQI
85AQI
95AQI
107AQI
96AQI
113AQI
119AQI
94AQI
71AQI
65AQI
80AQI
78AQI
93AQI
133AQI
115AQI
116AQI
56AQI
46AQI
75AQI
105AQI
90AQI
93AQI
112AQI
119AQI
148AQI
133AQI
140AQI
122AQI
139AQI
133AQI
153AQI
154AQI
142AQI
73AQI
87AQI
110AQI
64AQI
38AQI
83AQI
90AQI
105AQI
132AQI
118AQI
103AQI
68AQI
115AQI
103AQI
122AQI
140AQI
134AQI
155AQI
140AQI
160AQI
160AQI
156AQI
156AQI
141AQI
93AQI
87AQI
98AQI
97AQI
110AQI
142AQI
158AQI
159AQI
102AQI
110AQI
96AQI
81AQI
101AQI
124AQI
146AQI
133AQI
129AQI
130AQI
119AQI
93AQI
124AQI
137AQI
131AQI
121AQI
113AQI
62AQI
35AQI
40AQI
83AQI
96AQI
80AQI
84AQI
80AQI
99AQI
105AQI
119AQI
100AQI
82AQI
83AQI
85AQI
57AQI
69AQI
89AQI
73AQI
80AQI
57AQI
43AQI
30AQI
63AQI
64AQI
55AQI
63AQI
72AQI
71AQI
64AQI
85AQI
76AQI
68AQI
56AQI
52AQI
48AQI
80AQI
77AQI
66AQI
64AQI
56AQI
43AQI
53AQI
73AQI
47AQI
52AQI
59AQI
60AQI
63AQI
64AQI
57AQI
37AQI
21AQI
45AQI
57AQI
62AQI
47AQI
35AQI
50AQI
39AQI
40AQI
54AQI
58AQI
63AQI
64AQI
49AQI
45AQI
53AQI
41AQI
48AQI
48AQI
61AQI
87AQI
116AQI
122AQI
74AQI
54AQI
55AQI
No. of days
202572AQI
Highest AQI recorded in
July122AQI
Lowest AQI recorded in
January41AQI
202458AQI
Highest AQI recorded in
May96AQI
Lowest AQI recorded in
November34AQI
202373AQI
Highest AQI recorded in
May106AQI
Lowest AQI recorded in
January38AQI
202263AQI
Highest AQI recorded in
June118AQI
Lowest AQI recorded in
January33AQI
202170AQI
Highest AQI recorded in
July131AQI
Lowest AQI recorded in
November37AQI
202070AQI
Highest AQI recorded in
June108AQI
Lowest AQI recorded in
December38AQI
Most & Least Polluted Years Over the Last 6 Years
San Fernando's annual 2025 AQI (72) shows an average percentage change of 8.7% (worsened AQI) compared to previous years: 2020 (70), 2021 (70), 2022 (63), 2023 (73), 2024 (58).