St Maries, Coeur Dalene, Idaho, United States 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
St Maries, Coeur Dalene, Idaho, United States
AQI Trends: Highest and Lowest
Same Day Analysis (3rd October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 47 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Oct - 4th Oct 2025
St Maries, Coeur Dalene, Idaho, United States
6 AM3rd Oct 2025
6 PM
5 AM4th Oct 2025
63AQI
30AQI
66AQI
54AQI
In the last 24 hours,
St Maries's AQI reached its highest point of 66 at 1 AM during the Night, while the lowest point, 30, was recorded at 4 PM during the Day between 3rd Oct and 4th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
St Maries, Coeur Dalene, Idaho, United States
26°C20/33°C
24°C16/32°C
25°C19/33°C
24°C19/30°C
21°C13/28°C
21°C13/29°C
21°C13/29°C
20°C13/28°C
17°C12/24°C
19°C12/28°C
15°C10/18°C
12°C8/15°C
18°C8/28°C
21°C13/30°C
21°C12/30°C
21°C13/31°C
23°C15/29°C
18°C14/24°C
15°C7/23°C
18°C8/28°C
21°C12/31°C
21°C13/30°C
15°C8/22°C
17°C9/28°C
21°C12/31°C
20°C14/29°C
15°C12/21°C
15°C11/22°C
13°C9/19°C
13°C8/19°C
--°C/°C
53AQI
53AQI
55AQI
52AQI
2025 Days Vs Air Quality
St Maries, Coeur Dalene, Idaho, United States
85%
235
15%
41
Total number of days with different AQI categories in last 277 days in 2025 (88 days remaining)
Under WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2025, 85% of 277 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
St Maries, Coeur Dalene, Idaho, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
28AQI
31AQI
30AQI
34AQI
24AQI
33AQI
38AQI
33AQI
35AQI
33AQI
58AQI
48AQI
36AQI
31AQI
40AQI
28AQI
32AQI
37AQI
42AQI
36AQI
43AQI
55AQI
38AQI
57AQI
60AQI
51AQI
53AQI
53AQI
52AQI
46AQI
41AQI
24AQI
32AQI
28AQI
26AQI
28AQI
54AQI
45AQI
30AQI
64AQI
53AQI
57AQI
57AQI
65AQI
50AQI
32AQI
28AQI
42AQI
35AQI
46AQI
41AQI
23AQI
27AQI
20AQI
20AQI
20AQI
26AQI
28AQI
32AQI
33AQI
39AQI
46AQI
30AQI
26AQI
44AQI
37AQI
25AQI
23AQI
24AQI
24AQI
21AQI
21AQI
34AQI
23AQI
20AQI
28AQI
29AQI
24AQI
23AQI
21AQI
18AQI
24AQI
21AQI
23AQI
23AQI
22AQI
24AQI
22AQI
28AQI
20AQI
27AQI
25AQI
34AQI
28AQI
32AQI
27AQI
30AQI
18AQI
21AQI
30AQI
21AQI
27AQI
23AQI
27AQI
30AQI
34AQI
25AQI
32AQI
32AQI
28AQI
25AQI
20AQI
22AQI
22AQI
22AQI
23AQI
24AQI
23AQI
21AQI
23AQI
24AQI
24AQI
31AQI
21AQI
21AQI
23AQI
25AQI
18AQI
27AQI
30AQI
22AQI
18AQI
20AQI
24AQI
21AQI
24AQI
16AQI
16AQI
19AQI
22AQI
23AQI
27AQI
20AQI
20AQI
24AQI
27AQI
19AQI
24AQI
25AQI
18AQI
24AQI
22AQI
20AQI
24AQI
25AQI
24AQI
28AQI
24AQI
23AQI
28AQI
32AQI
35AQI
40AQI
29AQI
24AQI
22AQI
24AQI
35AQI
35AQI
26AQI
24AQI
28AQI
27AQI
25AQI
43AQI
34AQI
29AQI
24AQI
21AQI
19AQI
23AQI
26AQI
29AQI
28AQI
25AQI
34AQI
25AQI
25AQI
26AQI
29AQI
22AQI
25AQI
28AQI
25AQI
24AQI
23AQI
26AQI
31AQI
29AQI
27AQI
27AQI
27AQI
32AQI
31AQI
32AQI
26AQI
21AQI
21AQI
23AQI
24AQI
30AQI
38AQI
43AQI
50AQI
42AQI
36AQI
33AQI
32AQI
25AQI
20AQI
22AQI
22AQI
29AQI
33AQI
47AQI
53AQI
27AQI
20AQI
15AQI
21AQI
31AQI
33AQI
25AQI
41AQI
59AQI
52AQI
55AQI
57AQI
62AQI
61AQI
55AQI
54AQI
65AQI
61AQI
61AQI
73AQI
80AQI
85AQI
97AQI
69AQI
57AQI
57AQI
68AQI
58AQI
51AQI
60AQI
49AQI
31AQI
32AQI
42AQI
40AQI
42AQI
45AQI
53AQI
33AQI
41AQI
44AQI
40AQI
65AQI
81AQI
76AQI
47AQI
35AQI
35AQI
36AQI
47AQI
41AQI
37AQI
26AQI
26AQI
22AQI
27AQI
27AQI
39AQI
56AQI
39AQI
No. of days
202534AQI
Highest AQI recorded in
September56AQI
Lowest AQI recorded in
May22AQI
202435AQI
Highest AQI recorded in
January50AQI
Lowest AQI recorded in
June21AQI
202340AQI
Highest AQI recorded in
November69AQI
Lowest AQI recorded in
June27AQI
202242AQI
Highest AQI recorded in
November71AQI
Lowest AQI recorded in
July23AQI
202141AQI
Highest AQI recorded in
August70AQI
Lowest AQI recorded in
May22AQI
202040AQI
Highest AQI recorded in
September78AQI
Lowest AQI recorded in
May16AQI
Most & Least Polluted Years Over the Last 6 Years
St Maries's annual 2025 AQI (34) shows an average percentage change of -15.09% (improved AQI) compared to previous years: 2020 (40), 2021 (41), 2022 (42), 2023 (40), 2024 (35).