Porto das Caixas, Niteroi, 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!
October Air Quality Analysis
Porto das Caixas, Niteroi, Rio de Janeiro, Brazil
AQI Trends: Highest and Lowest
Same Day Analysis (2nd October ):
On this day, AQI across the 3 years varied significantly: 2025 ranks 1st highest AQI at 70 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 2nd Oct - 3rd Oct 2025
Porto das Caixas, Niteroi, Rio de Janeiro, Brazil
5 AM2nd Oct 2025
5 PM
4 AM3rd Oct 2025
78AQI
71AQI
72AQI
50AQI
In the last 24 hours,
Porto das Caixas's AQI reached its highest point of 78 at 10 AM during the Day, while the lowest point, 50, was recorded at 1 AM during the Night between 2nd Oct and 3rd Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Porto das Caixas, Niteroi, Rio de Janeiro, Brazil
21°C15/29°C
22°C15/31°C
22°C17/32°C
21°C17/25°C
20°C19/23°C
22°C18/27°C
26°C19/36°C
21°C16/27°C
21°C15/28°C
20°C16/25°C
19°C18/20°C
20°C16/26°C
21°C15/29°C
23°C17/32°C
22°C18/27°C
22°C18/29°C
24°C17/33°C
26°C20/35°C
30°C22/38°C
29°C22/41°C
20°C19/20°C
20°C18/24°C
17°C16/18°C
17°C14/22°C
18°C13/25°C
20°C13/29°C
22°C16/31°C
23°C17/33°C
23°C17/31°C
23°C17/31°C
--°C/°C
48AQI
46AQI
46AQI
46AQI
2025 Days Vs Air Quality
Porto das Caixas, Niteroi, Rio de Janeiro, Brazil
58%
159
42%
116
Total number of days with different AQI categories in last 276 days in 2025 (89 days remaining)
Under WHO’s Safe Air Quality Limits: 58%
Health Risk Level:
Considerable
In 2025, 58% of 276 days were within WHO’s safe air quality limits, and 42% exceeded them. The risk of health issues is Considerable, with potential for conditions in sensitive individuals.
Annual Air Quality Insights
Porto das Caixas, Niteroi, Rio de Janeiro, Brazil
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
58AQI
58AQI
58AQI
59AQI
60AQI
62AQI
62AQI
61AQI
62AQI
66AQI
67AQI
67AQI
67AQI
70AQI
69AQI
72AQI
70AQI
74AQI
73AQI
74AQI
73AQI
72AQI
70AQI
70AQI
69AQI
70AQI
67AQI
65AQI
63AQI
62AQI
61AQI
60AQI
61AQI
60AQI
61AQI
60AQI
61AQI
62AQI
62AQI
63AQI
62AQI
62AQI
65AQI
64AQI
64AQI
63AQI
68AQI
71AQI
72AQI
72AQI
70AQI
70AQI
69AQI
69AQI
66AQI
66AQI
65AQI
63AQI
60AQI
60AQI
59AQI
58AQI
57AQI
57AQI
56AQI
56AQI
55AQI
54AQI
53AQI
51AQI
51AQI
50AQI
50AQI
49AQI
47AQI
45AQI
45AQI
44AQI
44AQI
44AQI
45AQI
43AQI
44AQI
45AQI
45AQI
45AQI
45AQI
46AQI
45AQI
44AQI
43AQI
43AQI
43AQI
42AQI
41AQI
40AQI
38AQI
36AQI
34AQI
32AQI
31AQI
32AQI
30AQI
30AQI
28AQI
29AQI
29AQI
27AQI
28AQI
28AQI
28AQI
28AQI
28AQI
28AQI
28AQI
29AQI
28AQI
29AQI
28AQI
28AQI
29AQI
29AQI
30AQI
29AQI
30AQI
31AQI
31AQI
31AQI
32AQI
31AQI
30AQI
28AQI
28AQI
27AQI
28AQI
28AQI
29AQI
27AQI
30AQI
28AQI
31AQI
32AQI
30AQI
29AQI
29AQI
30AQI
31AQI
32AQI
31AQI
34AQI
35AQI
38AQI
37AQI
39AQI
35AQI
36AQI
33AQI
34AQI
33AQI
32AQI
28AQI
26AQI
27AQI
27AQI
27AQI
29AQI
30AQI
35AQI
38AQI
37AQI
36AQI
39AQI
39AQI
38AQI
34AQI
32AQI
30AQI
33AQI
34AQI
35AQI
34AQI
33AQI
31AQI
31AQI
32AQI
28AQI
28AQI
27AQI
28AQI
29AQI
33AQI
35AQI
35AQI
38AQI
43AQI
59AQI
62AQI
65AQI
65AQI
64AQI
58AQI
59AQI
62AQI
60AQI
65AQI
60AQI
56AQI
58AQI
55AQI
47AQI
49AQI
47AQI
51AQI
65AQI
69AQI
65AQI
67AQI
57AQI
55AQI
59AQI
49AQI
44AQI
41AQI
43AQI
53AQI
60AQI
56AQI
53AQI
56AQI
60AQI
56AQI
58AQI
67AQI
76AQI
74AQI
65AQI
55AQI
46AQI
44AQI
50AQI
46AQI
44AQI
47AQI
45AQI
44AQI
44AQI
41AQI
54AQI
47AQI
49AQI
45AQI
52AQI
63AQI
69AQI
67AQI
59AQI
53AQI
49AQI
49AQI
40AQI
35AQI
33AQI
33AQI
34AQI
36AQI
38AQI
27AQI
25AQI
29AQI
19AQI
28AQI
46AQI
59AQI
72AQI
70AQI
66AQI
65AQI
49AQI
32AQI
30AQI
34AQI
47AQI
56AQI
44AQI
71AQI
No. of days
202547AQI
Highest AQI recorded in
October71AQI
Lowest AQI recorded in
May30AQI
202445AQI
Highest AQI recorded in
September65AQI
Lowest AQI recorded in
March25AQI
202329AQI
Highest AQI recorded in
November35AQI
Lowest AQI recorded in
December28AQI
202232AQI
Highest AQI recorded in
October39AQI
Lowest AQI recorded in
December28AQI
Most & Least Polluted Years Over the Last 4 Years
Porto das Caixas's annual 2025 AQI (47) shows an average percentage change of 38.8% (worsened AQI) compared to previous years: 2022 (32), 2023 (29), 2024 (45).