Coeur d Alene, Idaho, United States 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
Coeur d Alene, Idaho, United States
AQI Trends: Highest and Lowest
Same Day Analysis (27th September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 81 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 27th Sep - 28th Sep 2025
Coeur d Alene, Idaho, United States
6 AM27th Sep 2025
7 PM
5 AM28th Sep 2025
95AQI
76AQI
116AQI
103AQI
In the last 24 hours,
Coeur d Alene's AQI reached its highest point of 116 at 12 AM during the Night, while the lowest point, undefined, was recorded at 5 AM during the Night between 27th Sep and 28th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Coeur d Alene, Idaho, United States
23°C16/31°C
25°C17/33°C
28°C19/36°C
28°C22/36°C
29°C21/37°C
28°C20/37°C
26°C18/33°C
24°C17/31°C
24°C18/33°C
24°C18/31°C
22°C15/29°C
22°C16/30°C
22°C15/29°C
22°C16/30°C
19°C14/25°C
21°C14/28°C
17°C13/19°C
13°C11/15°C
19°C11/28°C
23°C16/30°C
22°C14/30°C
23°C17/31°C
23°C16/30°C
17°C13/24°C
14°C7/23°C
16°C6/28°C
19°C8/30°C
19°C7/29°C
16°C8/23°C
15°C7/27°C
--°C/°C
59AQI
57AQI
62AQI
59AQI
2025 Days Vs Air Quality
Coeur d Alene, Idaho, United States
86%
160
13%
25
0.5%
1
Total number of days with different AQI categories in last 271 days in 2025 (94 days remaining)
Under WHO’s Safe Air Quality Limits: 86%
Health Risk Level:
Low
In 2025, 86% of 271 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
Coeur d Alene, Idaho, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
47AQI
27AQI
21AQI
19AQI
27AQI
19AQI
19AQI
22AQI
22AQI
22AQI
23AQI
29AQI
24AQI
14AQI
15AQI
27AQI
22AQI
27AQI
22AQI
29AQI
25AQI
33AQI
18AQI
21AQI
20AQI
22AQI
16AQI
15AQI
21AQI
25AQI
26AQI
37AQI
38AQI
28AQI
19AQI
20AQI
22AQI
28AQI
29AQI
18AQI
20AQI
21AQI
30AQI
17AQI
24AQI
28AQI
18AQI
15AQI
17AQI
19AQI
20AQI
17AQI
16AQI
14AQI
18AQI
15AQI
15AQI
20AQI
20AQI
24AQI
26AQI
28AQI
17AQI
24AQI
27AQI
16AQI
22AQI
19AQI
14AQI
17AQI
20AQI
24AQI
26AQI
25AQI
24AQI
29AQI
30AQI
35AQI
42AQI
27AQI
22AQI
23AQI
27AQI
29AQI
23AQI
22AQI
22AQI
24AQI
24AQI
28AQI
47AQI
34AQI
24AQI
18AQI
15AQI
16AQI
24AQI
29AQI
33AQI
26AQI
24AQI
34AQI
24AQI
27AQI
26AQI
22AQI
19AQI
26AQI
27AQI
21AQI
24AQI
22AQI
35AQI
37AQI
35AQI
34AQI
35AQI
35AQI
36AQI
33AQI
36AQI
31AQI
29AQI
30AQI
27AQI
29AQI
30AQI
32AQI
39AQI
45AQI
44AQI
34AQI
31AQI
32AQI
23AQI
21AQI
21AQI
25AQI
22AQI
26AQI
39AQI
46AQI
24AQI
14AQI
16AQI
25AQI
31AQI
33AQI
23AQI
40AQI
53AQI
51AQI
52AQI
54AQI
59AQI
59AQI
54AQI
53AQI
66AQI
61AQI
63AQI
75AQI
93AQI
95AQI
105AQI
70AQI
57AQI
59AQI
67AQI
61AQI
56AQI
62AQI
52AQI
33AQI
37AQI
47AQI
47AQI
44AQI
49AQI
49AQI
30AQI
37AQI
45AQI
54AQI
55AQI
81AQI
27AQI
23AQI
21AQI
25AQI
29AQI
37AQI
59AQI
No. of days
202532AQI
Highest AQI recorded in
September59AQI
Lowest AQI recorded in
May21AQI
Most & Least Polluted Years Over the Last 1 Years
Coeur d Alene's annual 2025 AQI (32) shows an average percentage change of NaN% (improved AQI) compared to previous years: .