Chilliwack, British Columbia, Canada Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
October Air Quality Analysis
Chilliwack, British Columbia, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (3rd October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 33 of Good air quality, showing improvement over 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Oct - 4th Oct 2025
Chilliwack, British Columbia, Canada
6 AM3rd Oct 2025
7 PM
5 AM4th Oct 2025
50AQI
12AQI
55AQI
39AQI
In the last 24 hours,
Chilliwack's AQI reached its highest point of 55 at 3 AM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 3rd Oct and 4th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Chilliwack, British Columbia, Canada
23°C19/30°C
22°C15/29°C
19°C15/22°C
16°C14/16°C
15°C12/19°C
17°C10/22°C
18°C15/23°C
13°C10/18°C
13°C10/15°C
14°C9/17°C
16°C11/19°C
13°C9/17°C
18°C11/26°C
17°C13/22°C
14°C8/21°C
15°C9/22°C
15°C10/22°C
16°C9/22°C
16°C9/24°C
18°C10/27°C
16°C8/25°C
13°C8/20°C
14°C9/21°C
16°C13/24°C
18°C13/25°C
15°C12/19°C
16°C12/22°C
15°C11/21°C
15°C12/20°C
13°C8/20°C
--°C/°C
39AQI
36AQI
40AQI
38AQI
2025 Days Vs Air Quality
Chilliwack, British Columbia, Canada
93%
256
7%
20
Total number of days with different AQI categories in last 277 days in 2025 (88 days remaining)
Under WHO’s Safe Air Quality Limits: 93%
Health Risk Level:
Very Low
In 2025, 93% of 277 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
Chilliwack, British Columbia, Canada
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
31AQI
29AQI
27AQI
25AQI
24AQI
25AQI
26AQI
27AQI
25AQI
27AQI
23AQI
33AQI
33AQI
33AQI
35AQI
44AQI
33AQI
35AQI
40AQI
35AQI
53AQI
43AQI
57AQI
39AQI
27AQI
36AQI
39AQI
43AQI
50AQI
61AQI
40AQI
21AQI
24AQI
20AQI
20AQI
21AQI
24AQI
30AQI
58AQI
50AQI
42AQI
25AQI
34AQI
39AQI
31AQI
29AQI
30AQI
41AQI
39AQI
26AQI
19AQI
24AQI
21AQI
19AQI
21AQI
16AQI
24AQI
25AQI
26AQI
29AQI
44AQI
24AQI
25AQI
20AQI
21AQI
26AQI
25AQI
24AQI
23AQI
34AQI
23AQI
20AQI
23AQI
24AQI
28AQI
25AQI
22AQI
24AQI
17AQI
18AQI
18AQI
20AQI
23AQI
23AQI
21AQI
17AQI
16AQI
16AQI
18AQI
20AQI
19AQI
23AQI
22AQI
26AQI
25AQI
28AQI
17AQI
15AQI
15AQI
16AQI
15AQI
19AQI
19AQI
21AQI
27AQI
25AQI
17AQI
23AQI
21AQI
22AQI
17AQI
20AQI
28AQI
33AQI
41AQI
45AQI
45AQI
35AQI
20AQI
22AQI
30AQI
31AQI
16AQI
18AQI
19AQI
26AQI
27AQI
18AQI
24AQI
36AQI
29AQI
26AQI
26AQI
23AQI
26AQI
22AQI
25AQI
15AQI
20AQI
12AQI
15AQI
20AQI
21AQI
25AQI
26AQI
19AQI
18AQI
20AQI
18AQI
18AQI
22AQI
18AQI
20AQI
24AQI
20AQI
26AQI
19AQI
20AQI
24AQI
24AQI
30AQI
33AQI
43AQI
39AQI
30AQI
29AQI
28AQI
27AQI
23AQI
18AQI
21AQI
23AQI
22AQI
30AQI
37AQI
35AQI
28AQI
20AQI
20AQI
22AQI
27AQI
26AQI
19AQI
18AQI
21AQI
23AQI
23AQI
25AQI
23AQI
17AQI
18AQI
23AQI
20AQI
21AQI
18AQI
19AQI
36AQI
40AQI
42AQI
31AQI
30AQI
33AQI
32AQI
34AQI
30AQI
23AQI
27AQI
34AQI
32AQI
36AQI
38AQI
35AQI
29AQI
25AQI
31AQI
45AQI
52AQI
45AQI
17AQI
20AQI
26AQI
33AQI
25AQI
27AQI
21AQI
24AQI
41AQI
14AQI
18AQI
21AQI
27AQI
26AQI
26AQI
27AQI
29AQI
54AQI
59AQI
60AQI
58AQI
58AQI
60AQI
52AQI
54AQI
54AQI
53AQI
68AQI
86AQI
82AQI
72AQI
49AQI
41AQI
47AQI
52AQI
45AQI
39AQI
34AQI
35AQI
20AQI
31AQI
48AQI
35AQI
40AQI
49AQI
41AQI
25AQI
34AQI
49AQI
26AQI
24AQI
32AQI
25AQI
35AQI
23AQI
16AQI
12AQI
33AQI
35AQI
29AQI
23AQI
24AQI
22AQI
26AQI
27AQI
36AQI
43AQI
20AQI
No. of days
202529AQI
Highest AQI recorded in
September43AQI
Lowest AQI recorded in
October20AQI
202422AQI
Highest AQI recorded in
December29AQI
Lowest AQI recorded in
January17AQI
202324AQI
Highest AQI recorded in
August45AQI
Lowest AQI recorded in
January17AQI
202249AQI
Highest AQI recorded in
October73AQI
Lowest AQI recorded in
December18AQI
202141AQI
Highest AQI recorded in
August111AQI
Lowest AQI recorded in
February18AQI
202027AQI
Highest AQI recorded in
September56AQI
Lowest AQI recorded in
December15AQI
Most & Least Polluted Years Over the Last 6 Years
Chilliwack's annual 2025 AQI (29) shows an average percentage change of -1.6% (improved AQI) compared to previous years: 2020 (27), 2021 (41), 2022 (49), 2023 (24), 2024 (22).