Lac Saint Jean, Roberval, Quebec, Canada Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Lac Saint Jean, Roberval, Quebec, Canada
AQI Trends: Highest and Lowest
Same Day Analysis (20th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 19 of Good air quality, showing improvement over 2023 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 20th Aug - 21st Aug 2025
Lac Saint Jean, Roberval, Quebec, Canada
5 AM20th Aug 2025
8 PM
4 AM21st Aug 2025
20AQI
17AQI
24AQI
18AQI
In the last 24 hours,
Lac Saint Jean's AQI reached its highest point of 24 at 12 AM during the Night, while the lowest point, 17, was recorded at 3 PM during the Day between 20th Aug and 21st Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Lac Saint Jean, Roberval, Quebec, Canada
16°C11/21°C
19°C13/23°C
20°C17/24°C
21°C18/24°C
20°C12/26°C
23°C19/28°C
20°C16/24°C
19°C13/25°C
18°C16/21°C
14°C10/18°C
15°C8/20°C
17°C11/22°C
20°C16/25°C
15°C12/19°C
15°C7/21°C
17°C10/23°C
19°C10/26°C
23°C15/29°C
25°C20/30°C
27°C22/32°C
28°C24/32°C
27°C23/32°C
24°C19/26°C
16°C12/20°C
16°C8/22°C
22°C15/27°C
14°C11/14°C
13°C9/18°C
13°C7/17°C
16°C10/19°C
--°C/°C
38AQI
38AQI
41AQI
39AQI
2025 Days Vs Air Quality
Lac Saint Jean, Roberval, Quebec, Canada
94%
219
6%
13
Total number of days with different AQI categories in last 233 days in 2025 (132 days remaining)
Under WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2025, 94% of 233 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
Lac Saint Jean, Roberval, Quebec, Canada
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
30AQI
21AQI
22AQI
20AQI
23AQI
22AQI
20AQI
22AQI
21AQI
22AQI
24AQI
24AQI
30AQI
28AQI
22AQI
23AQI
30AQI
37AQI
24AQI
24AQI
28AQI
38AQI
33AQI
31AQI
26AQI
32AQI
29AQI
30AQI
30AQI
25AQI
35AQI
26AQI
28AQI
31AQI
22AQI
21AQI
27AQI
27AQI
24AQI
23AQI
25AQI
24AQI
29AQI
27AQI
23AQI
23AQI
23AQI
19AQI
20AQI
19AQI
22AQI
23AQI
26AQI
27AQI
28AQI
26AQI
25AQI
25AQI
24AQI
24AQI
21AQI
24AQI
28AQI
31AQI
19AQI
23AQI
25AQI
27AQI
23AQI
24AQI
20AQI
20AQI
20AQI
25AQI
31AQI
15AQI
16AQI
25AQI
28AQI
17AQI
17AQI
18AQI
22AQI
22AQI
21AQI
18AQI
18AQI
19AQI
22AQI
28AQI
17AQI
17AQI
20AQI
31AQI
28AQI
24AQI
27AQI
31AQI
15AQI
21AQI
19AQI
23AQI
20AQI
23AQI
23AQI
17AQI
17AQI
17AQI
25AQI
17AQI
13AQI
17AQI
12AQI
14AQI
16AQI
16AQI
12AQI
16AQI
19AQI
13AQI
17AQI
23AQI
14AQI
15AQI
16AQI
21AQI
17AQI
14AQI
14AQI
17AQI
14AQI
15AQI
18AQI
27AQI
23AQI
27AQI
30AQI
14AQI
13AQI
12AQI
19AQI
16AQI
19AQI
12AQI
14AQI
17AQI
23AQI
26AQI
30AQI
23AQI
22AQI
12AQI
15AQI
22AQI
36AQI
38AQI
45AQI
55AQI
35AQI
52AQI
48AQI
38AQI
33AQI
21AQI
20AQI
22AQI
30AQI
36AQI
24AQI
31AQI
21AQI
21AQI
23AQI
38AQI
33AQI
23AQI
18AQI
23AQI
26AQI
23AQI
28AQI
28AQI
26AQI
29AQI
20AQI
26AQI
28AQI
24AQI
22AQI
24AQI
30AQI
32AQI
37AQI
40AQI
36AQI
39AQI
45AQI
33AQI
21AQI
35AQI
45AQI
20AQI
16AQI
21AQI
25AQI
37AQI
53AQI
61AQI
56AQI
55AQI
61AQI
27AQI
20AQI
33AQI
78AQI
47AQI
28AQI
34AQI
35AQI
41AQI
52AQI
52AQI
54AQI
57AQI
52AQI
31AQI
28AQI
37AQI
25AQI
14AQI
20AQI
19AQI
27AQI
25AQI
22AQI
19AQI
19AQI
30AQI
34AQI
38AQI
No. of days
202526AQI
Highest AQI recorded in
August38AQI
Lowest AQI recorded in
May19AQI
202426AQI
Highest AQI recorded in
August40AQI
Lowest AQI recorded in
November14AQI
202329AQI
Highest AQI recorded in
June60AQI
Lowest AQI recorded in
December21AQI
202224AQI
Highest AQI recorded in
July33AQI
Lowest AQI recorded in
November19AQI
202123AQI
Highest AQI recorded in
August35AQI
Lowest AQI recorded in
September14AQI
202020AQI
Highest AQI recorded in
June27AQI
Lowest AQI recorded in
October14AQI
Most & Least Polluted Years Over the Last 6 Years
Lac Saint Jean's annual 2025 AQI (26) shows an average percentage change of 8.8% (worsened AQI) compared to previous years: 2020 (20), 2021 (23), 2022 (24), 2023 (29), 2024 (26).