Rio de Janeiro, Rio de Janeiro, Brazil Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Rio de Janeiro, Rio de Janeiro, Brazil
AQI Trends: Highest and Lowest
Same Day Analysis (25th August ):
On this day, AQI across the 2 years varied significantly: 2025 ranks 1st highest AQI at 54 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 24th Aug - 25th Aug 2025
Rio de Janeiro, Rio de Janeiro, Brazil
6 AM24th Aug 2025
5 PM
5 AM25th Aug 2025
64AQI
57AQI
63AQI
45AQI
In the last 24 hours,
Rio de Janeiro's AQI reached its highest point of 64 at 5 PM during the Day, while the lowest point, 45, was recorded at 5 AM during the Night between 24th Aug and 25th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Rio de Janeiro, Rio de Janeiro, Brazil
--°C/°C
22°C17/29°C
25°C20/33°C
19°C17/19°C
17°C14/22°C
17°C13/22°C
18°C14/25°C
20°C14/28°C
22°C15/30°C
22°C17/30°C
20°C17/25°C
21°C17/27°C
21°C16/27°C
23°C17/33°C
19°C16/20°C
18°C15/23°C
18°C16/21°C
18°C15/23°C
19°C14/26°C
19°C15/24°C
20°C17/24°C
19°C17/24°C
20°C16/26°C
20°C16/26°C
21°C16/27°C
24°C17/31°C
25°C20/34°C
26°C20/33°C
27°C20/35°C
23°C21/28°C
23°C20/29°C
56AQI
56AQI
57AQI
57AQI
2025 Days Vs Air Quality
Rio de Janeiro, Rio de Janeiro, Brazil
60%
142
40%
95
Total number of days with different AQI categories in last 238 days in 2025 (127 days remaining)
Under WHO’s Safe Air Quality Limits: 60%
Health Risk Level:
Moderate
In 2025, 60% of 238 days were within WHO’s safe air quality limits, and 40% exceeded them. The risk of health issues is Moderate, particularly for individuals with respiratory or heart conditions.
Annual Air Quality Insights
Rio de Janeiro, Rio de Janeiro, Brazil
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
54AQI
58AQI
54AQI
53AQI
53AQI
54AQI
54AQI
55AQI
55AQI
54AQI
53AQI
52AQI
52AQI
53AQI
53AQI
53AQI
54AQI
53AQI
55AQI
54AQI
53AQI
53AQI
54AQI
53AQI
53AQI
53AQI
53AQI
52AQI
51AQI
50AQI
49AQI
48AQI
51AQI
50AQI
50AQI
51AQI
51AQI
52AQI
53AQI
54AQI
54AQI
57AQI
59AQI
61AQI
60AQI
62AQI
65AQI
65AQI
65AQI
67AQI
65AQI
64AQI
63AQI
63AQI
61AQI
59AQI
58AQI
57AQI
56AQI
57AQI
56AQI
56AQI
54AQI
53AQI
52AQI
51AQI
50AQI
48AQI
47AQI
45AQI
44AQI
44AQI
44AQI
43AQI
41AQI
40AQI
41AQI
40AQI
38AQI
37AQI
38AQI
41AQI
39AQI
41AQI
43AQI
41AQI
42AQI
43AQI
44AQI
43AQI
43AQI
45AQI
44AQI
42AQI
40AQI
38AQI
36AQI
35AQI
35AQI
34AQI
32AQI
32AQI
32AQI
31AQI
30AQI
30AQI
30AQI
30AQI
32AQI
30AQI
29AQI
29AQI
29AQI
31AQI
28AQI
28AQI
29AQI
30AQI
28AQI
29AQI
30AQI
30AQI
33AQI
33AQI
35AQI
35AQI
36AQI
38AQI
38AQI
37AQI
33AQI
32AQI
31AQI
31AQI
32AQI
33AQI
35AQI
34AQI
35AQI
35AQI
38AQI
38AQI
34AQI
34AQI
35AQI
36AQI
37AQI
37AQI
36AQI
40AQI
39AQI
44AQI
42AQI
43AQI
40AQI
40AQI
36AQI
37AQI
36AQI
36AQI
33AQI
30AQI
29AQI
30AQI
32AQI
35AQI
37AQI
42AQI
44AQI
42AQI
46AQI
46AQI
45AQI
42AQI
36AQI
34AQI
34AQI
34AQI
35AQI
38AQI
41AQI
37AQI
31AQI
29AQI
30AQI
29AQI
28AQI
27AQI
29AQI
32AQI
35AQI
36AQI
37AQI
40AQI
47AQI
59AQI
65AQI
69AQI
73AQI
67AQI
63AQI
59AQI
65AQI
69AQI
68AQI
63AQI
58AQI
61AQI
56AQI
51AQI
50AQI
51AQI
51AQI
64AQI
71AQI
67AQI
67AQI
58AQI
55AQI
59AQI
48AQI
44AQI
41AQI
41AQI
47AQI
59AQI
55AQI
49AQI
50AQI
58AQI
57AQI
58AQI
69AQI
75AQI
73AQI
65AQI
54AQI
53AQI
58AQI
45AQI
33AQI
35AQI
38AQI
49AQI
57AQI
No. of days
202546AQI
Highest AQI recorded in
February58AQI
Lowest AQI recorded in
April33AQI
202449AQI
Highest AQI recorded in
September85AQI
Lowest AQI recorded in
March25AQI
202328AQI
Highest AQI recorded in
November36AQI
Lowest AQI recorded in
January22AQI
202239AQI
Highest AQI recorded in
October42AQI
Lowest AQI recorded in
September34AQI
Most & Least Polluted Years Over the Last 4 Years
Rio de Janeiro's annual 2025 AQI (46) shows an average percentage change of 23.7% (worsened AQI) compared to previous years: 2022 (39), 2023 (28), 2024 (49).