Pacos De Ferreira, Porto, Portugal 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
Pacos De Ferreira, Porto, Portugal
AQI Trends: Highest and Lowest
Same Day Analysis (18th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 27 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 18th Sep - 19th Sep 2025
Pacos De Ferreira, Porto, Portugal
7 AM18th Sep 2025
8 PM
6 AM19th Sep 2025
40AQI
24AQI
46AQI
28AQI
In the last 24 hours,
Pacos De Ferreira's AQI reached its highest point of 46 at 3 AM during the Night, while the lowest point, undefined, was recorded at 6 AM during the Night between 18th Sep and 19th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Pacos De Ferreira, Porto, Portugal
19°C14/27°C
21°C13/29°C
24°C17/33°C
24°C17/34°C
21°C15/29°C
21°C15/31°C
20°C14/29°C
18°C12/25°C
18°C13/24°C
19°C16/25°C
20°C16/26°C
18°C13/22°C
17°C12/23°C
18°C14/24°C
18°C14/22°C
19°C14/25°C
20°C12/30°C
20°C14/28°C
18°C14/22°C
17°C12/24°C
16°C10/23°C
17°C14/21°C
18°C14/25°C
19°C14/25°C
18°C13/24°C
21°C16/28°C
20°C15/27°C
22°C15/32°C
22°C16/31°C
24°C17/32°C
--°C/°C
28AQI
27AQI
28AQI
26AQI
2025 Days Vs Air Quality
Pacos De Ferreira, Porto, Portugal
92%
241
8%
20
Total number of days with different AQI categories in last 262 days in 2025 (103 days remaining)
Under WHO’s Safe Air Quality Limits: 92%
Health Risk Level:
Very Low
In 2025, 92% of 262 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Pacos De Ferreira, Porto, Portugal
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
45AQI
45AQI
46AQI
41AQI
35AQI
32AQI
29AQI
26AQI
25AQI
24AQI
24AQI
22AQI
34AQI
40AQI
60AQI
75AQI
46AQI
47AQI
61AQI
42AQI
33AQI
34AQI
31AQI
33AQI
31AQI
28AQI
29AQI
31AQI
31AQI
32AQI
34AQI
32AQI
27AQI
31AQI
37AQI
39AQI
43AQI
39AQI
36AQI
34AQI
32AQI
34AQI
33AQI
27AQI
27AQI
29AQI
30AQI
31AQI
39AQI
38AQI
41AQI
37AQI
34AQI
35AQI
35AQI
41AQI
37AQI
41AQI
38AQI
35AQI
32AQI
31AQI
35AQI
34AQI
34AQI
31AQI
29AQI
29AQI
27AQI
28AQI
28AQI
27AQI
25AQI
26AQI
26AQI
26AQI
28AQI
27AQI
26AQI
23AQI
24AQI
25AQI
24AQI
26AQI
30AQI
33AQI
36AQI
37AQI
34AQI
33AQI
36AQI
35AQI
30AQI
29AQI
24AQI
24AQI
24AQI
26AQI
27AQI
35AQI
44AQI
42AQI
37AQI
28AQI
19AQI
17AQI
17AQI
19AQI
18AQI
18AQI
20AQI
21AQI
22AQI
24AQI
25AQI
23AQI
21AQI
20AQI
23AQI
26AQI
31AQI
32AQI
38AQI
30AQI
33AQI
29AQI
31AQI
39AQI
40AQI
39AQI
34AQI
30AQI
30AQI
28AQI
27AQI
31AQI
33AQI
35AQI
32AQI
36AQI
35AQI
29AQI
31AQI
30AQI
27AQI
22AQI
24AQI
28AQI
38AQI
44AQI
44AQI
38AQI
30AQI
28AQI
25AQI
24AQI
22AQI
23AQI
37AQI
49AQI
55AQI
50AQI
39AQI
36AQI
35AQI
30AQI
30AQI
40AQI
50AQI
54AQI
51AQI
47AQI
46AQI
50AQI
54AQI
51AQI
41AQI
36AQI
36AQI
40AQI
42AQI
43AQI
41AQI
40AQI
43AQI
48AQI
49AQI
42AQI
36AQI
37AQI
38AQI
37AQI
36AQI
33AQI
31AQI
34AQI
38AQI
39AQI
35AQI
32AQI
30AQI
30AQI
28AQI
29AQI
29AQI
30AQI
31AQI
32AQI
32AQI
35AQI
34AQI
38AQI
42AQI
39AQI
38AQI
42AQI
53AQI
50AQI
55AQI
53AQI
54AQI
50AQI
54AQI
57AQI
57AQI
54AQI
58AQI
59AQI
56AQI
54AQI
40AQI
30AQI
29AQI
27AQI
37AQI
45AQI
33AQI
40AQI
34AQI
27AQI
25AQI
23AQI
22AQI
21AQI
21AQI
24AQI
21AQI
29AQI
33AQI
32AQI
27AQI
20AQI
20AQI
23AQI
25AQI
23AQI
24AQI
21AQI
23AQI
28AQI
27AQI
37AQI
35AQI
29AQI
26AQI
33AQI
40AQI
36AQI
43AQI
25AQI
No. of days
202534AQI
Highest AQI recorded in
August43AQI
Lowest AQI recorded in
September25AQI
202434AQI
Highest AQI recorded in
February50AQI
Lowest AQI recorded in
May21AQI
202333AQI
Highest AQI recorded in
January74AQI
Lowest AQI recorded in
September17AQI
202225AQI
Highest AQI recorded in
December33AQI
Lowest AQI recorded in
April9AQI
202150AQI
Highest AQI recorded in
June93AQI
Lowest AQI recorded in
November13AQI
202041AQI
Highest AQI recorded in
August56AQI
Lowest AQI recorded in
May29AQI
Most & Least Polluted Years Over the Last 6 Years
Pacos De Ferreira's annual 2025 AQI (34) shows an average percentage change of -1.08% (improved AQI) compared to previous years: 2020 (41), 2021 (50), 2022 (25), 2023 (33), 2024 (34).