Nanaimo, British Columbia, Canada 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
Nanaimo, British Columbia, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (7th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 43 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 7th Sep - 8th Sep 2025
Nanaimo, British Columbia, Canada
6 AM7th Sep 2025
8 PM
5 AM8th Sep 2025
44AQI
26AQI
41AQI
25AQI
In the last 24 hours,
Nanaimo's AQI reached its highest point of 44 at 6 AM during the Day, while the lowest point, 25, was recorded at 5 AM during the Night between 7th Sep and 8th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Nanaimo, British Columbia, Canada
20°C17/23°C
23°C19/28°C
22°C17/28°C
25°C21/30°C
20°C18/21°C
17°C16/20°C
17°C14/21°C
18°C16/21°C
17°C14/18°C
17°C15/19°C
17°C16/19°C
17°C15/19°C
19°C14/25°C
22°C18/27°C
25°C20/29°C
25°C21/29°C
24°C20/28°C
24°C19/28°C
21°C18/25°C
20°C18/24°C
21°C19/24°C
18°C16/21°C
20°C15/26°C
19°C16/22°C
19°C15/26°C
23°C19/29°C
22°C18/26°C
20°C17/24°C
20°C18/23°C
18°C16/20°C
--°C/°C
39AQI
32AQI
36AQI
36AQI
2025 Days Vs Air Quality
Nanaimo, British Columbia, Canada
94%
235
6%
15
Total number of days with different AQI categories in last 251 days in 2025 (114 days remaining)
Under WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2025, 94% of 251 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
Nanaimo, British Columbia, Canada
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
47AQI
44AQI
43AQI
42AQI
41AQI
43AQI
45AQI
47AQI
45AQI
46AQI
43AQI
44AQI
44AQI
50AQI
51AQI
51AQI
43AQI
44AQI
46AQI
46AQI
53AQI
54AQI
55AQI
44AQI
44AQI
46AQI
46AQI
48AQI
51AQI
50AQI
25AQI
20AQI
23AQI
25AQI
24AQI
31AQI
27AQI
31AQI
54AQI
48AQI
41AQI
28AQI
27AQI
33AQI
34AQI
23AQI
22AQI
29AQI
27AQI
21AQI
21AQI
21AQI
19AQI
18AQI
23AQI
18AQI
23AQI
26AQI
31AQI
36AQI
34AQI
22AQI
22AQI
26AQI
26AQI
28AQI
23AQI
37AQI
34AQI
36AQI
29AQI
26AQI
25AQI
23AQI
20AQI
24AQI
20AQI
22AQI
18AQI
20AQI
17AQI
17AQI
20AQI
21AQI
20AQI
17AQI
16AQI
15AQI
27AQI
18AQI
20AQI
21AQI
29AQI
32AQI
33AQI
30AQI
17AQI
13AQI
15AQI
20AQI
17AQI
22AQI
19AQI
25AQI
18AQI
19AQI
19AQI
21AQI
21AQI
18AQI
18AQI
21AQI
19AQI
23AQI
30AQI
25AQI
24AQI
24AQI
20AQI
18AQI
25AQI
29AQI
17AQI
16AQI
19AQI
21AQI
25AQI
19AQI
20AQI
24AQI
20AQI
19AQI
23AQI
21AQI
19AQI
15AQI
15AQI
14AQI
15AQI
12AQI
14AQI
16AQI
16AQI
19AQI
23AQI
20AQI
16AQI
20AQI
16AQI
18AQI
16AQI
16AQI
17AQI
19AQI
17AQI
19AQI
16AQI
18AQI
21AQI
18AQI
25AQI
27AQI
27AQI
26AQI
20AQI
20AQI
20AQI
20AQI
16AQI
16AQI
17AQI
14AQI
14AQI
20AQI
32AQI
33AQI
19AQI
17AQI
17AQI
20AQI
20AQI
19AQI
17AQI
18AQI
20AQI
23AQI
21AQI
21AQI
22AQI
16AQI
16AQI
19AQI
20AQI
19AQI
16AQI
23AQI
35AQI
39AQI
33AQI
28AQI
26AQI
28AQI
25AQI
25AQI
28AQI
22AQI
22AQI
26AQI
31AQI
33AQI
36AQI
25AQI
21AQI
21AQI
23AQI
42AQI
37AQI
43AQI
17AQI
19AQI
27AQI
26AQI
19AQI
20AQI
18AQI
22AQI
22AQI
13AQI
16AQI
21AQI
22AQI
21AQI
23AQI
22AQI
29AQI
35AQI
43AQI
51AQI
53AQI
54AQI
56AQI
42AQI
46AQI
45AQI
40AQI
64AQI
56AQI
60AQI
60AQI
43AQI
46AQI
27AQI
24AQI
22AQI
19AQI
20AQI
24AQI
30AQI
53AQI
No. of days
202527AQI
Highest AQI recorded in
September53AQI
Lowest AQI recorded in
May19AQI
202422AQI
Highest AQI recorded in
December40AQI
Lowest AQI recorded in
June16AQI
202323AQI
Highest AQI recorded in
May29AQI
Lowest AQI recorded in
December18AQI
202226AQI
Highest AQI recorded in
November35AQI
Lowest AQI recorded in
July17AQI
202127AQI
Highest AQI recorded in
March32AQI
Lowest AQI recorded in
November24AQI
202029AQI
Highest AQI recorded in
September60AQI
Lowest AQI recorded in
June18AQI
Most & Least Polluted Years Over the Last 6 Years
Nanaimo's annual 2025 AQI (27) shows an average percentage change of 8.5% (worsened AQI) compared to previous years: 2020 (29), 2021 (27), 2022 (26), 2023 (23), 2024 (22).