Butte Greely School, Butte, Montana, 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
Butte Greely School, Butte, Montana, United States
AQI Trends: Highest and Lowest
Same Day Analysis (28th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 40 of Good air quality, showing improvement over 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 27th Oct - 28th Oct 2025
Butte Greely School, Butte, Montana, United States
7 AM27th Oct 2025
6 PM
6 AM28th Oct 2025
26AQI
11AQI
53AQI
12AQI
In the last 24 hours,
Butte Greely School's AQI reached its highest point of 53 at 1 AM during the Night, while the lowest point, 11, was recorded at 4 PM during the Day between 27th Oct and 28th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Butte Greely School, Butte, Montana, United States
16°C7/25°C
15°C8/24°C
13°C8/19°C
11°C6/17°C
11°C6/18°C
8°C5/11°C
6°C3/12°C
2°C-2/7°C
5°C-3/13°C
8°C0/19°C
9°C1/19°C
11°C4/20°C
12°C5/21°C
9°C2/13°C
3°C-1/7°C
-2°C-4/1°C
1°C-4/9°C
3°C0/9°C
3°C-1/7°C
4°C-2/12°C
3°C-3/11°C
2°C-1/9°C
1°C-2/6°C
4°C-2/13°C
6°C0/16°C
7°C2/14°C
8°C2/16°C
6°C1/13°C
1°C-3/6°C
-2°C-6/2°C
--°C/°C
29AQI
18AQI
24AQI
17AQI
2025 Days Vs Air Quality
Butte Greely School, Butte, Montana, United States
95%
287
5%
14
Total number of days with different AQI categories in last 301 days in 2025 (64 days remaining)
Under WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2025, 95% of 301 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
Butte Greely School, Butte, Montana, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
32AQI
35AQI
41AQI
25AQI
37AQI
34AQI
29AQI
35AQI
25AQI
30AQI
22AQI
23AQI
24AQI
34AQI
49AQI
35AQI
24AQI
23AQI
25AQI
33AQI
34AQI
27AQI
51AQI
38AQI
31AQI
39AQI
49AQI
54AQI
59AQI
67AQI
45AQI
25AQI
30AQI
26AQI
28AQI
27AQI
26AQI
27AQI
34AQI
35AQI
30AQI
41AQI
37AQI
45AQI
32AQI
18AQI
22AQI
31AQI
19AQI
26AQI
35AQI
22AQI
21AQI
14AQI
14AQI
13AQI
17AQI
21AQI
29AQI
32AQI
32AQI
22AQI
18AQI
17AQI
16AQI
14AQI
17AQI
18AQI
16AQI
19AQI
19AQI
19AQI
20AQI
19AQI
16AQI
18AQI
20AQI
24AQI
19AQI
15AQI
17AQI
17AQI
16AQI
19AQI
32AQI
28AQI
26AQI
19AQI
16AQI
20AQI
19AQI
31AQI
20AQI
18AQI
18AQI
28AQI
26AQI
17AQI
27AQI
41AQI
38AQI
22AQI
16AQI
25AQI
26AQI
37AQI
20AQI
18AQI
25AQI
18AQI
16AQI
17AQI
22AQI
25AQI
22AQI
22AQI
27AQI
21AQI
23AQI
18AQI
20AQI
28AQI
40AQI
23AQI
18AQI
17AQI
21AQI
23AQI
24AQI
24AQI
19AQI
27AQI
18AQI
18AQI
16AQI
18AQI
15AQI
16AQI
19AQI
16AQI
17AQI
19AQI
19AQI
23AQI
24AQI
23AQI
20AQI
19AQI
23AQI
20AQI
24AQI
32AQI
18AQI
18AQI
21AQI
23AQI
25AQI
28AQI
45AQI
41AQI
30AQI
24AQI
22AQI
23AQI
23AQI
27AQI
29AQI
26AQI
27AQI
27AQI
24AQI
17AQI
16AQI
17AQI
30AQI
29AQI
27AQI
24AQI
23AQI
20AQI
24AQI
34AQI
36AQI
29AQI
39AQI
44AQI
25AQI
28AQI
31AQI
29AQI
27AQI
24AQI
29AQI
28AQI
27AQI
22AQI
27AQI
31AQI
38AQI
40AQI
28AQI
31AQI
25AQI
22AQI
30AQI
37AQI
34AQI
27AQI
28AQI
32AQI
23AQI
32AQI
30AQI
27AQI
27AQI
26AQI
26AQI
27AQI
26AQI
17AQI
17AQI
20AQI
20AQI
21AQI
26AQI
31AQI
29AQI
31AQI
24AQI
22AQI
22AQI
35AQI
47AQI
49AQI
39AQI
50AQI
55AQI
53AQI
46AQI
35AQI
43AQI
43AQI
54AQI
53AQI
52AQI
64AQI
59AQI
73AQI
73AQI
86AQI
38AQI
41AQI
43AQI
24AQI
19AQI
18AQI
20AQI
18AQI
19AQI
23AQI
26AQI
27AQI
28AQI
24AQI
20AQI
21AQI
24AQI
25AQI
31AQI
37AQI
31AQI
33AQI
24AQI
10AQI
12AQI
9AQI
12AQI
9AQI
11AQI
22AQI
22AQI
26AQI
21AQI
11AQI
13AQI
12AQI
14AQI
25AQI
21AQI
26AQI
19AQI
33AQI
19AQI
24AQI
37AQI
33AQI
37AQI
42AQI
16AQI
22AQI
40AQI
36AQI
27AQI
20AQI
23AQI
21AQI
25AQI
30AQI
33AQI
36AQI
21AQI
No. of days
202527AQI
Highest AQI recorded in
September36AQI
Lowest AQI recorded in
March20AQI
202434AQI
Highest AQI recorded in
July54AQI
Lowest AQI recorded in
May19AQI
202330AQI
Highest AQI recorded in
December49AQI
Lowest AQI recorded in
June16AQI
202232AQI
Highest AQI recorded in
September58AQI
Lowest AQI recorded in
May14AQI
202138AQI
Highest AQI recorded in
July83AQI
Lowest AQI recorded in
May21AQI
202030AQI
Highest AQI recorded in
September50AQI
Lowest AQI recorded in
May12AQI
Most & Least Polluted Years Over the Last 6 Years
Butte Greely School's annual 2025 AQI (27) shows an average percentage change of -16.02% (improved AQI) compared to previous years: 2020 (30), 2021 (38), 2022 (32), 2023 (30), 2024 (34).