Castlebar, Mayo, Ireland Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
March Air Quality Analysis
Castlebar, Mayo, Ireland
AQI Trends: Highest and Lowest
Same Day Analysis (9th March):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 30 of Good air quality, showing improvement over 2025 and 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 8th Mar - 9th Mar 2026
Castlebar, Mayo, Ireland
7 AM8th Mar 2026
6 PM
6 AM9th Mar 2026
28AQI
4AQI
67AQI
21AQI
In the last 24 hours,
Castlebar's AQI reached its highest point of 67 at 8 PM during the Night, while the lowest point, 4, was recorded at 3 PM during the Day between 8th Mar and 9th Mar 2026.
Day & Night AQI Trend : Feb - Mar 2026
Castlebar, Mayo, Ireland
6°C3/9°C
5°C2/6°C
7°C5/8°C
8°C8/9°C
6°C3/7°C
3°C0/6°C
2°C0/4°C
6°C4/8°C
5°C1/8°C
3°C1/5°C
6°C3/9°C
6°C4/8°C
9°C7/10°C
10°C8/12°C
8°C7/10°C
9°C8/11°C
10°C9/12°C
10°C10/12°C
9°C8/12°C
6°C2/9°C
4°C0/9°C
8°C4/11°C
6°C3/10°C
4°C1/9°C
7°C2/10°C
5°C2/7°C
5°C1/10°C
9°C7/12°C
8°C6/9°C
7°C7/10°C
36AQI
27AQI
46AQI
32AQI
2026 Days Vs Air Quality
Castlebar, Mayo, Ireland
90%
61
10%
7
Total number of days with different AQI categories in last 69 days in 2026 (296 days remaining)
Under WHO’s Safe Air Quality Limits: 90%
Health Risk Level:
Very Low
In 2026, 90% of 69 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)
47AQI (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)
45AQI (US)
65AQI (US)
34AQI (US)
33AQI (US)
28AQI (US)
23AQI (US)
29AQI (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)
24AQI (US)
23AQI (US)
53AQI (US)
49AQI (US)
31AQI (US)
33AQI (US)
26AQI (US)
21AQI (US)
30AQI (US)
36AQI (US)
37AQI (US)
32AQI (US)
No. of days
202636AQI (US)
Highest AQI (US) recorded in
February37AQI (US)
Lowest AQI (US) recorded in
March32AQI (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
July15AQI (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) (36) shows an average percentage change of 37.08% (worsened AQI (US)) compared to previous years: 2021 (22), 2022 (29), 2023 (23), 2024 (25), 2025 (34).