Castlebar, Mayo, Ireland Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
June Air Quality Analysis
Castlebar, Mayo, Ireland
AQI Trends: Highest and Lowest
Same Day Analysis (3rd June):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 16 of Good air quality, showing improvement over 2025, 2024 and 2023 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Jun - 4th Jun 2026
Castlebar, Mayo, Ireland
5 AM3rd Jun 2026
9 PM
4 AM4th Jun 2026
27AQI
4AQI
21AQI
8AQI
In the last 24 hours,
Castlebar's AQI reached its highest point of 27 at 5 PM during the Day, while the lowest point, 4, was recorded at 8 AM during the Day between 3rd Jun and 4th Jun 2026.
Day & Night AQI Trend : May - Jun 2026
Castlebar, Mayo, Ireland
7°C2/13°C
8°C3/12°C
9°C6/12°C
7°C3/11°C
8°C2/11°C
10°C8/12°C
10°C7/12°C
9°C7/12°C
8°C5/11°C
8°C4/11°C
10°C7/12°C
8°C4/10°C
8°C3/12°C
11°C9/14°C
12°C8/15°C
13°C12/15°C
13°C10/17°C
13°C9/16°C
14°C10/19°C
15°C9/23°C
16°C11/22°C
17°C11/24°C
15°C13/18°C
14°C12/17°C
13°C11/17°C
13°C10/17°C
14°C12/16°C
12°C10/15°C
12°C10/14°C
11°C9/14°C
30AQI
23AQI
30AQI
27AQI
2026 Days Vs Air Quality
Castlebar, Mayo, Ireland
94%
142
6%
9
Total number of days with different AQI categories in last 155 days in 2026 (210 days remaining)
Under WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2026, 94% of 155 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
Castlebar, Mayo, Ireland
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
40AQI (US)
37AQI (US)
40AQI (US)
46AQI (US)
37AQI (US)
32AQI (US)
33AQI (US)
48AQI (US)
35AQI (US)
40AQI (US)
15AQI (US)
22AQI (US)
37AQI (US)
28AQI (US)
24AQI (US)
33AQI (US)
52AQI (US)
56AQI (US)
30AQI (US)
43AQI (US)
19AQI (US)
36AQI (US)
42AQI (US)
43AQI (US)
46AQI (US)
37AQI (US)
28AQI (US)
31AQI (US)
32AQI (US)
21AQI (US)
42AQI (US)
35AQI (US)
59AQI (US)
38AQI (US)
35AQI (US)
53AQI (US)
42AQI (US)
44AQI (US)
66AQI (US)
33AQI (US)
33AQI (US)
28AQI (US)
23AQI (US)
28AQI (US)
60AQI (US)
21AQI (US)
27AQI (US)
39AQI (US)
32AQI (US)
39AQI (US)
44AQI (US)
47AQI (US)
32AQI (US)
35AQI (US)
34AQI (US)
24AQI (US)
23AQI (US)
32AQI (US)
29AQI (US)
23AQI (US)
24AQI (US)
53AQI (US)
49AQI (US)
31AQI (US)
33AQI (US)
26AQI (US)
21AQI (US)
31AQI (US)
26AQI (US)
36AQI (US)
39AQI (US)
34AQI (US)
30AQI (US)
26AQI (US)
27AQI (US)
23AQI (US)
32AQI (US)
38AQI (US)
62AQI (US)
79AQI (US)
48AQI (US)
21AQI (US)
26AQI (US)
32AQI (US)
23AQI (US)
25AQI (US)
28AQI (US)
26AQI (US)
35AQI (US)
29AQI (US)
25AQI (US)
24AQI (US)
23AQI (US)
20AQI (US)
26AQI (US)
25AQI (US)
27AQI (US)
23AQI (US)
22AQI (US)
26AQI (US)
23AQI (US)
23AQI (US)
25AQI (US)
23AQI (US)
23AQI (US)
28AQI (US)
21AQI (US)
25AQI (US)
19AQI (US)
22AQI (US)
29AQI (US)
27AQI (US)
27AQI (US)
25AQI (US)
25AQI (US)
20AQI (US)
21AQI (US)
25AQI (US)
30AQI (US)
28AQI (US)
23AQI (US)
25AQI (US)
24AQI (US)
24AQI (US)
18AQI (US)
19AQI (US)
19AQI (US)
18AQI (US)
22AQI (US)
25AQI (US)
22AQI (US)
29AQI (US)
36AQI (US)
40AQI (US)
33AQI (US)
33AQI (US)
32AQI (US)
35AQI (US)
35AQI (US)
37AQI (US)
47AQI (US)
34AQI (US)
30AQI (US)
24AQI (US)
24AQI (US)
22AQI (US)
21AQI (US)
24AQI (US)
19AQI (US)
20AQI (US)
16AQI (US)
36AQI (US)
37AQI (US)
33AQI (US)
24AQI (US)
28AQI (US)
18AQI (US)
No. of days
202631AQI (US)
Highest AQI (US) recorded in
February37AQI (US)
Lowest AQI (US) recorded in
June18AQI (US)
202534AQI (US)
Highest AQI (US) recorded in
December54AQI (US)
Lowest AQI (US) recorded in
July22AQI (US)
202425AQI (US)
Highest AQI (US) recorded in
December33AQI (US)
Lowest AQI (US) recorded in
July18AQI (US)
202323AQI (US)
Highest AQI (US) recorded in
November32AQI (US)
Lowest AQI (US) recorded in
July17AQI (US)
202229AQI (US)
Highest AQI (US) recorded in
June79AQI (US)
Lowest AQI (US) recorded in
August15AQI (US)
202122AQI (US)
Highest AQI (US) recorded in
December34AQI (US)
Lowest AQI (US) recorded in
April7AQI (US)
Most & Least Polluted Years Over the Last 6 Years
Castlebar's annual 2026 AQI (US) (31) shows an average percentage change of 19.5% (worsened AQI (US)) compared to previous years: 2021 (22), 2022 (29), 2023 (23), 2024 (25), 2025 (34).