West Glacier, Montana, 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
West Glacier, Montana, United States
AQI Trends: Highest and Lowest
Same Day Analysis (29th September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 51 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 29th Sep - 30th Sep 2025
West Glacier, Montana, United States
7 AM29th Sep 2025
7 PM
6 AM30th Sep 2025
78AQI
46AQI
35AQI
13AQI
In the last 24 hours,
West Glacier's AQI reached its highest point of 78 at 5 PM during the Day, while the lowest point, 13, was recorded at 5 AM during the Night between 29th Sep and 30th Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
West Glacier, Montana, United States
22°C15/30°C
23°C15/29°C
24°C14/32°C
23°C16/32°C
18°C14/21°C
17°C8/26°C
20°C12/28°C
20°C15/27°C
18°C15/24°C
19°C12/28°C
19°C12/26°C
19°C12/27°C
17°C13/22°C
17°C10/24°C
17°C11/25°C
14°C12/17°C
17°C11/23°C
18°C12/25°C
18°C12/26°C
19°C13/27°C
19°C13/26°C
17°C12/23°C
13°C6/21°C
14°C5/25°C
17°C7/27°C
18°C4/29°C
16°C10/22°C
14°C5/25°C
17°C4/27°C
18°C7/29°C
--°C/°C
60AQI
53AQI
53AQI
53AQI
2025 Days Vs Air Quality
West Glacier, Montana, United States
89%
168
11%
20
Total number of days with different AQI categories in last 273 days in 2025 (92 days remaining)
Under WHO’s Safe Air Quality Limits: 89%
Health Risk Level:
Low
In 2025, 89% of 273 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
West Glacier, Montana, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
34AQI
22AQI
17AQI
15AQI
19AQI
18AQI
16AQI
18AQI
17AQI
24AQI
28AQI
30AQI
24AQI
11AQI
13AQI
30AQI
28AQI
16AQI
16AQI
27AQI
25AQI
24AQI
17AQI
17AQI
24AQI
17AQI
13AQI
16AQI
16AQI
17AQI
22AQI
24AQI
30AQI
20AQI
15AQI
17AQI
23AQI
28AQI
39AQI
16AQI
17AQI
19AQI
19AQI
19AQI
23AQI
29AQI
19AQI
16AQI
17AQI
17AQI
16AQI
17AQI
13AQI
13AQI
13AQI
13AQI
14AQI
16AQI
16AQI
16AQI
18AQI
22AQI
21AQI
16AQI
21AQI
20AQI
23AQI
20AQI
15AQI
16AQI
20AQI
24AQI
25AQI
25AQI
51AQI
45AQI
33AQI
41AQI
53AQI
23AQI
20AQI
23AQI
28AQI
30AQI
28AQI
23AQI
23AQI
20AQI
20AQI
24AQI
37AQI
37AQI
28AQI
19AQI
16AQI
17AQI
21AQI
28AQI
30AQI
24AQI
22AQI
32AQI
25AQI
24AQI
24AQI
27AQI
19AQI
21AQI
27AQI
23AQI
25AQI
28AQI
49AQI
38AQI
32AQI
29AQI
30AQI
25AQI
24AQI
28AQI
32AQI
30AQI
25AQI
25AQI
24AQI
26AQI
29AQI
32AQI
35AQI
35AQI
36AQI
40AQI
36AQI
36AQI
24AQI
17AQI
23AQI
28AQI
25AQI
29AQI
41AQI
46AQI
44AQI
31AQI
22AQI
25AQI
37AQI
38AQI
38AQI
37AQI
42AQI
42AQI
48AQI
51AQI
46AQI
41AQI
48AQI
46AQI
58AQI
58AQI
61AQI
76AQI
83AQI
80AQI
93AQI
97AQI
69AQI
56AQI
54AQI
46AQI
44AQI
39AQI
56AQI
35AQI
36AQI
50AQI
43AQI
45AQI
45AQI
55AQI
26AQI
29AQI
33AQI
41AQI
72AQI
62AQI
66AQI
51AQI
21AQI
20AQI
19AQI
27AQI
28AQI
37AQI
55AQI
No. of days
202531AQI
Highest AQI recorded in
September55AQI
Lowest AQI recorded in
May19AQI
Most & Least Polluted Years Over the Last 1 Years
West Glacier's annual 2025 AQI (31) shows an average percentage change of NaN% (improved AQI) compared to previous years: .