Ribeirao Preto, State Of Sao Paulo, Brazil 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
Ribeirao Preto, State Of Sao Paulo, Brazil
AQI Trends: Highest and Lowest
Same Day Analysis (16th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 66 of Moderate air quality, showing improvement over 2024 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 16th Sep - 17th Sep 2025
Ribeirao Preto, State Of Sao Paulo, Brazil
6 AM16th Sep 2025
6 PM
5 AM17th Sep 2025
69AQI
57AQI
64AQI
46AQI
In the last 24 hours,
Ribeirao Preto's AQI reached its highest point of 69 at 8 AM during the Day, while the lowest point, 46, was recorded at 4 AM during the Night between 16th Sep and 17th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Ribeirao Preto, State Of Sao Paulo, Brazil
--°C/°C
23°C15/32°C
24°C17/33°C
26°C20/34°C
26°C19/34°C
25°C17/33°C
25°C18/34°C
25°C17/33°C
25°C18/33°C
25°C17/33°C
25°C19/33°C
23°C19/29°C
23°C15/30°C
23°C16/32°C
25°C18/32°C
24°C19/31°C
24°C17/31°C
24°C16/32°C
25°C17/34°C
25°C18/34°C
26°C17/35°C
28°C22/34°C
27°C21/33°C
24°C16/34°C
25°C16/35°C
25°C17/34°C
24°C16/34°C
24°C16/34°C
26°C17/36°C
26°C20/35°C
26°C19/34°C
67AQI
64AQI
69AQI
64AQI
2025 Days Vs Air Quality
Ribeirao Preto, State Of Sao Paulo, Brazil
59%
153
41%
106
Total number of days with different AQI categories in last 261 days in 2025 (104 days remaining)
Under WHO’s Safe Air Quality Limits: 59%
Health Risk Level:
Considerable
In 2025, 59% of 261 days were within WHO’s safe air quality limits, and 41% exceeded them. The risk of health issues is Considerable, with potential for conditions in sensitive individuals.
Annual Air Quality Insights
Ribeirao Preto, State Of Sao Paulo, Brazil
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
38AQI
40AQI
32AQI
35AQI
32AQI
35AQI
33AQI
36AQI
38AQI
41AQI
47AQI
48AQI
33AQI
40AQI
33AQI
43AQI
41AQI
44AQI
40AQI
37AQI
37AQI
46AQI
40AQI
33AQI
40AQI
39AQI
31AQI
39AQI
35AQI
37AQI
32AQI
31AQI
29AQI
22AQI
28AQI
35AQI
43AQI
43AQI
36AQI
49AQI
44AQI
42AQI
40AQI
33AQI
48AQI
49AQI
48AQI
45AQI
42AQI
42AQI
49AQI
55AQI
47AQI
37AQI
38AQI
47AQI
46AQI
56AQI
51AQI
50AQI
44AQI
45AQI
42AQI
39AQI
44AQI
48AQI
49AQI
56AQI
51AQI
50AQI
54AQI
54AQI
49AQI
49AQI
41AQI
40AQI
40AQI
38AQI
31AQI
38AQI
43AQI
37AQI
33AQI
49AQI
48AQI
47AQI
47AQI
50AQI
44AQI
39AQI
47AQI
54AQI
55AQI
48AQI
32AQI
23AQI
25AQI
29AQI
48AQI
37AQI
35AQI
43AQI
47AQI
42AQI
38AQI
38AQI
36AQI
43AQI
34AQI
28AQI
33AQI
33AQI
44AQI
49AQI
29AQI
27AQI
37AQI
37AQI
38AQI
47AQI
42AQI
46AQI
45AQI
47AQI
48AQI
50AQI
53AQI
53AQI
54AQI
53AQI
33AQI
27AQI
32AQI
31AQI
36AQI
39AQI
47AQI
39AQI
48AQI
56AQI
59AQI
62AQI
60AQI
55AQI
54AQI
53AQI
52AQI
51AQI
32AQI
49AQI
58AQI
60AQI
61AQI
46AQI
41AQI
49AQI
50AQI
50AQI
52AQI
35AQI
48AQI
47AQI
35AQI
34AQI
40AQI
48AQI
52AQI
56AQI
62AQI
62AQI
59AQI
70AQI
70AQI
64AQI
32AQI
52AQI
45AQI
56AQI
60AQI
57AQI
60AQI
56AQI
49AQI
39AQI
37AQI
48AQI
58AQI
58AQI
61AQI
63AQI
60AQI
55AQI
59AQI
52AQI
54AQI
61AQI
61AQI
62AQI
77AQI
63AQI
70AQI
68AQI
69AQI
69AQI
75AQI
72AQI
58AQI
69AQI
64AQI
44AQI
51AQI
51AQI
55AQI
65AQI
63AQI
59AQI
63AQI
55AQI
52AQI
65AQI
52AQI
52AQI
53AQI
54AQI
62AQI
67AQI
63AQI
57AQI
60AQI
63AQI
63AQI
64AQI
69AQI
76AQI
72AQI
84AQI
68AQI
65AQI
62AQI
53AQI
48AQI
53AQI
50AQI
45AQI
49AQI
50AQI
42AQI
71AQI
94AQI
70AQI
65AQI
66AQI
75AQI
79AQI
90AQI
77AQI
68AQI
76AQI
66AQI
38AQI
42AQI
45AQI
39AQI
47AQI
52AQI
59AQI
61AQI
68AQI
No. of days
202549AQI
Highest AQI recorded in
September68AQI
Lowest AQI recorded in
January38AQI
202452AQI
Highest AQI recorded in
September89AQI
Lowest AQI recorded in
January31AQI
202349AQI
Highest AQI recorded in
August67AQI
Lowest AQI recorded in
January31AQI
202249AQI
Highest AQI recorded in
August84AQI
Lowest AQI recorded in
February33AQI
202164AQI
Highest AQI recorded in
September124AQI
Lowest AQI recorded in
January35AQI
202062AQI
Highest AQI recorded in
September96AQI
Lowest AQI recorded in
December38AQI
Most & Least Polluted Years Over the Last 6 Years
Ribeirao Preto's annual 2025 AQI (49) shows an average percentage change of -9.9% (improved AQI) compared to previous years: 2020 (62), 2021 (64), 2022 (49), 2023 (49), 2024 (52).