Thompson Falls, 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
Thompson Falls, Montana, United States
AQI Trends: Highest and Lowest
Same Day Analysis (1st September ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 61 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 2nd Sep - 3rd Sep 2025
Thompson Falls, Montana, United States
6 AM2nd Sep 2025
8 PM
5 AM3rd Sep 2025
76AQI
56AQI
68AQI
56AQI
In the last 24 hours,
Thompson Falls's AQI reached its highest point of 76 at 3 PM during the Day, while the lowest point, 56, was recorded at 8 AM during the Day between 2nd Sep and 3rd Sep 2025.
Day & Night AQI Trend : Aug - Sep 2025
Thompson Falls, Montana, United States
20°C15/25°C
19°C12/25°C
18°C15/23°C
15°C13/17°C
15°C9/21°C
19°C14/24°C
22°C17/27°C
24°C19/29°C
24°C18/29°C
24°C19/28°C
20°C16/23°C
18°C13/23°C
18°C16/21°C
18°C15/22°C
20°C13/27°C
22°C16/28°C
21°C15/25°C
20°C14/26°C
20°C14/26°C
21°C14/28°C
22°C15/29°C
24°C17/30°C
25°C18/30°C
23°C19/27°C
17°C16/20°C
19°C14/24°C
21°C15/27°C
23°C17/31°C
25°C18/31°C
25°C18/32°C
--°C/°C
46AQI
36AQI
45AQI
38AQI
2025 Days Vs Air Quality
Thompson Falls, Montana, United States
94%
150
6%
10
Total number of days with different AQI categories in last 246 days in 2025 (119 days remaining)
Under WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2025, 94% of 246 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
Thompson Falls, Montana, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
48AQI
24AQI
23AQI
19AQI
39AQI
29AQI
17AQI
24AQI
18AQI
19AQI
20AQI
21AQI
24AQI
13AQI
18AQI
25AQI
23AQI
17AQI
17AQI
24AQI
21AQI
27AQI
19AQI
21AQI
22AQI
20AQI
29AQI
21AQI
20AQI
23AQI
28AQI
29AQI
27AQI
27AQI
21AQI
19AQI
22AQI
28AQI
31AQI
16AQI
15AQI
17AQI
24AQI
19AQI
25AQI
27AQI
17AQI
15AQI
18AQI
19AQI
17AQI
19AQI
14AQI
16AQI
13AQI
13AQI
13AQI
17AQI
16AQI
16AQI
17AQI
20AQI
19AQI
18AQI
22AQI
15AQI
23AQI
19AQI
15AQI
19AQI
20AQI
20AQI
20AQI
23AQI
33AQI
27AQI
31AQI
33AQI
36AQI
25AQI
18AQI
22AQI
22AQI
28AQI
29AQI
23AQI
18AQI
19AQI
19AQI
24AQI
40AQI
35AQI
22AQI
15AQI
15AQI
16AQI
21AQI
27AQI
32AQI
26AQI
21AQI
30AQI
22AQI
26AQI
29AQI
26AQI
20AQI
27AQI
25AQI
23AQI
27AQI
25AQI
41AQI
34AQI
31AQI
27AQI
28AQI
28AQI
34AQI
33AQI
32AQI
29AQI
29AQI
29AQI
28AQI
29AQI
35AQI
38AQI
45AQI
44AQI
44AQI
38AQI
37AQI
36AQI
33AQI
18AQI
19AQI
24AQI
22AQI
24AQI
37AQI
46AQI
30AQI
17AQI
17AQI
22AQI
28AQI
35AQI
34AQI
55AQI
53AQI
51AQI
51AQI
55AQI
52AQI
52AQI
55AQI
49AQI
62AQI
61AQI
30AQI
22AQI
19AQI
24AQI
29AQI
38AQI
61AQI
No. of days
202527AQI
Highest AQI recorded in
September61AQI
Lowest AQI recorded in
May19AQI
Most & Least Polluted Years Over the Last 1 Years
Thompson Falls's annual 2025 AQI (27) shows an average percentage change of NaN% (improved AQI) compared to previous years: .