Montrose, Colorado, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Montrose, Colorado, United States
AQI Trends: Highest and Lowest
Same Day Analysis (12th August ):
On this day, AQI across the 3 years varied significantly: 2025 ranks 2nd highest AQI at 41 of Good air quality, showing improvement over 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 12th Aug - 13th Aug 2025
Montrose, Colorado, United States
5 AM12th Aug 2025
8 PM
4 AM13th Aug 2025
48AQI
37AQI
52AQI
38AQI
In the last 24 hours,
Montrose's AQI reached its highest point of 52 at 3 AM during the Night, while the lowest point, 37, was recorded at 7 AM during the Day between 12th Aug and 13th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Montrose, Colorado, United States
20°C12/29°C
18°C9/27°C
17°C8/26°C
16°C6/26°C
17°C10/24°C
18°C11/25°C
17°C5/26°C
13°C2/22°C
13°C4/21°C
14°C6/22°C
13°C5/22°C
12°C3/19°C
12°C5/17°C
14°C8/18°C
15°C8/23°C
15°C6/22°C
13°C7/19°C
15°C7/22°C
15°C9/22°C
15°C4/24°C
14°C4/24°C
12°C1/22°C
16°C7/24°C
16°C8/25°C
16°C8/25°C
17°C5/27°C
18°C10/27°C
19°C9/27°C
19°C10/27°C
19°C11/27°C
--°C/°C
40AQI
35AQI
36AQI
36AQI
2025 Days Vs Air Quality
Montrose, Colorado, United States
100%
223
0.4%
1
Total number of days with different AQI categories in last 225 days in 2025 (140 days remaining)
Under WHO’s Safe Air Quality Limits: 100%
Health Risk Level:
Very Low
In 2025, 100% of 225 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
Montrose, Colorado, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
32AQI
36AQI
27AQI
22AQI
21AQI
23AQI
20AQI
24AQI
23AQI
23AQI
21AQI
23AQI
23AQI
23AQI
23AQI
24AQI
25AQI
21AQI
21AQI
20AQI
23AQI
24AQI
21AQI
22AQI
24AQI
28AQI
33AQI
29AQI
29AQI
28AQI
26AQI
29AQI
24AQI
26AQI
23AQI
23AQI
26AQI
24AQI
23AQI
22AQI
27AQI
27AQI
25AQI
17AQI
14AQI
13AQI
14AQI
14AQI
15AQI
13AQI
15AQI
14AQI
16AQI
17AQI
13AQI
13AQI
14AQI
14AQI
16AQI
18AQI
23AQI
15AQI
14AQI
15AQI
11AQI
11AQI
13AQI
15AQI
17AQI
17AQI
18AQI
20AQI
43AQI
31AQI
27AQI
24AQI
22AQI
26AQI
25AQI
26AQI
16AQI
20AQI
19AQI
18AQI
22AQI
23AQI
25AQI
25AQI
33AQI
29AQI
23AQI
16AQI
17AQI
19AQI
18AQI
20AQI
23AQI
24AQI
30AQI
36AQI
37AQI
29AQI
26AQI
26AQI
25AQI
22AQI
24AQI
19AQI
18AQI
19AQI
18AQI
20AQI
24AQI
27AQI
23AQI
20AQI
28AQI
16AQI
17AQI
19AQI
17AQI
19AQI
21AQI
22AQI
18AQI
17AQI
19AQI
21AQI
21AQI
22AQI
22AQI
26AQI
28AQI
26AQI
17AQI
18AQI
20AQI
21AQI
19AQI
20AQI
20AQI
25AQI
28AQI
27AQI
22AQI
19AQI
24AQI
26AQI
25AQI
27AQI
32AQI
31AQI
26AQI
22AQI
26AQI
22AQI
24AQI
27AQI
29AQI
31AQI
29AQI
27AQI
29AQI
29AQI
29AQI
26AQI
29AQI
28AQI
30AQI
28AQI
39AQI
42AQI
40AQI
32AQI
32AQI
34AQI
34AQI
33AQI
34AQI
37AQI
35AQI
32AQI
30AQI
28AQI
27AQI
35AQI
28AQI
24AQI
25AQI
28AQI
32AQI
43AQI
49AQI
43AQI
40AQI
43AQI
50AQI
52AQI
41AQI
34AQI
28AQI
23AQI
23AQI
28AQI
42AQI
37AQI
31AQI
30AQI
34AQI
37AQI
36AQI
48AQI
33AQI
29AQI
28AQI
39AQI
42AQI
45AQI
40AQI
36AQI
38AQI
33AQI
39AQI
41AQI
25AQI
19AQI
21AQI
23AQI
22AQI
30AQI
35AQI
37AQI
No. of days
202526AQI
Highest AQI recorded in
August37AQI
Lowest AQI recorded in
February19AQI
202426AQI
Highest AQI recorded in
September38AQI
Lowest AQI recorded in
January6AQI
20236AQI
Highest AQI recorded in
December6AQI
Lowest AQI recorded in
November6AQI
202146AQI
Highest AQI recorded in
September88AQI
Lowest AQI recorded in
October7AQI
2020185AQI
Highest AQI recorded in
September205AQI
Lowest AQI recorded in
August0AQI
Most & Least Polluted Years Over the Last 5 Years
Montrose's annual 2025 AQI (26) shows an average percentage change of 48.7% (worsened AQI) compared to previous years: 2020 (185), 2021 (46), 2023 (6), 2024 (26).