St Marys Sydney North West, Penrith, New South Wales, Australia 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
St Marys Sydney North West, Penrith, New South Wales, Australia
AQI Trends: Highest and Lowest
Same Day Analysis (9th March):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 29 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 8th Mar - 9th Mar 2026
St Marys Sydney North West, Penrith, New South Wales, Australia
6 AM8th Mar 2026
7 PM
5 AM9th Mar 2026
21AQI
8AQI
32AQI
19AQI
In the last 24 hours,
St Marys Sydney North West's AQI reached its highest point of 32 at 3 AM during the Night, while the lowest point, 8, was recorded at 1 PM during the Day between 8th Mar and 9th Mar 2026.
Day & Night AQI Trend : Feb - Mar 2026
St Marys Sydney North West, Penrith, New South Wales, Australia
21°C19/21°C
20°C19/24°C
23°C18/32°C
26°C18/37°C
22°C18/29°C
20°C18/22°C
20°C17/23°C
20°C16/25°C
19°C15/25°C
21°C14/31°C
25°C18/36°C
25°C20/34°C
24°C21/30°C
25°C20/35°C
25°C20/36°C
24°C21/31°C
25°C20/34°C
24°C19/32°C
20°C19/22°C
21°C19/22°C
21°C19/25°C
22°C18/28°C
21°C20/22°C
22°C20/25°C
24°C20/31°C
25°C20/34°C
24°C20/30°C
25°C21/33°C
20°C19/22°C
20°C17/24°C
37AQI
22AQI
27AQI
23AQI
2026 Days Vs Air Quality
St Marys Sydney North West, Penrith, New South Wales, Australia
97%
66
3%
2
Total number of days with different AQI categories in last 69 days in 2026 (296 days remaining)
Under WHO’s Safe Air Quality Limits: 97%
Health Risk Level:
Very Low
In 2026, 97% 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
St Marys Sydney North West, Penrith, New South Wales, Australia
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
23AQI (US)
15AQI (US)
17AQI (US)
15AQI (US)
27AQI (US)
27AQI (US)
26AQI (US)
24AQI (US)
33AQI (US)
25AQI (US)
64AQI (US)
17AQI (US)
22AQI (US)
17AQI (US)
30AQI (US)
16AQI (US)
20AQI (US)
18AQI (US)
16AQI (US)
15AQI (US)
19AQI (US)
25AQI (US)
21AQI (US)
21AQI (US)
36AQI (US)
32AQI (US)
19AQI (US)
21AQI (US)
22AQI (US)
19AQI (US)
45AQI (US)
59AQI (US)
16AQI (US)
15AQI (US)
28AQI (US)
39AQI (US)
35AQI (US)
31AQI (US)
25AQI (US)
19AQI (US)
34AQI (US)
39AQI (US)
35AQI (US)
20AQI (US)
12AQI (US)
14AQI (US)
29AQI (US)
27AQI (US)
28AQI (US)
30AQI (US)
20AQI (US)
30AQI (US)
32AQI (US)
23AQI (US)
34AQI (US)
28AQI (US)
13AQI (US)
16AQI (US)
17AQI (US)
19AQI (US)
24AQI (US)
17AQI (US)
39AQI (US)
36AQI (US)
44AQI (US)
32AQI (US)
14AQI (US)
29AQI (US)
24AQI (US)
27AQI (US)
28AQI (US)
No. of days
202626AQI (US)
Highest AQI (US) recorded in
March28AQI (US)
Lowest AQI (US) recorded in
January24AQI (US)
202526AQI (US)
Highest AQI (US) recorded in
October38AQI (US)
Lowest AQI (US) recorded in
August18AQI (US)
202418AQI (US)
Highest AQI (US) recorded in
December32AQI (US)
Lowest AQI (US) recorded in
June11AQI (US)
202315AQI (US)
Highest AQI (US) recorded in
December20AQI (US)
Lowest AQI (US) recorded in
April11AQI (US)
202213AQI (US)
Highest AQI (US) recorded in
January16AQI (US)
Lowest AQI (US) recorded in
May10AQI (US)
202121AQI (US)
Highest AQI (US) recorded in
August27AQI (US)
Lowest AQI (US) recorded in
February15AQI (US)
202027AQI (US)
Highest AQI (US) recorded in
July32AQI (US)
Lowest AQI (US) recorded in
December17AQI (US)
Most & Least Polluted Years Over the Last 7 Years
St Marys Sydney North West's annual 2026 AQI (US) (26) shows an average percentage change of 37.5% (worsened AQI (US)) compared to previous years: 2020 (27), 2021 (21), 2022 (13), 2023 (15), 2024 (18), 2025 (26).