Grand Junction, 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
Grand Junction, Colorado, United States
AQI Trends: Highest and Lowest
Same Day Analysis (21st August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 38 of Good air quality, showing improvement over 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 21st Aug - 22nd Aug 2025
Grand Junction, Colorado, United States
6 AM21st Aug 2025
8 PM
5 AM22nd Aug 2025
44AQI
28AQI
37AQI
28AQI
In the last 24 hours,
Grand Junction's AQI reached its highest point of 44 at 11 AM during the Day, while the lowest point, 28, was recorded at 9 PM during the Night between 21st Aug and 22nd Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Grand Junction, Colorado, United States
25°C16/35°C
25°C15/35°C
24°C11/35°C
23°C12/33°C
23°C10/36°C
25°C12/38°C
27°C16/36°C
24°C14/35°C
21°C13/33°C
22°C11/33°C
24°C12/34°C
24°C12/35°C
25°C11/37°C
24°C10/37°C
25°C12/38°C
26°C13/39°C
25°C13/37°C
25°C13/36°C
22°C12/30°C
22°C13/33°C
24°C11/35°C
25°C13/38°C
24°C13/35°C
22°C13/32°C
21°C12/32°C
22°C11/33°C
23°C11/35°C
25°C11/38°C
25°C12/38°C
27°C14/39°C
--°C/°C
45AQI
36AQI
39AQI
34AQI
2025 Days Vs Air Quality
Grand Junction, Colorado, United States
97%
227
3%
6
Total number of days with different AQI categories in last 234 days in 2025 (131 days remaining)
Under WHO’s Safe Air Quality Limits: 97%
Health Risk Level:
Very Low
In 2025, 97% of 234 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
Grand Junction, Colorado, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
34AQI
44AQI
41AQI
33AQI
24AQI
27AQI
30AQI
26AQI
25AQI
24AQI
25AQI
24AQI
23AQI
28AQI
30AQI
36AQI
46AQI
27AQI
21AQI
24AQI
25AQI
34AQI
25AQI
26AQI
27AQI
36AQI
48AQI
49AQI
45AQI
45AQI
34AQI
38AQI
33AQI
43AQI
33AQI
27AQI
30AQI
27AQI
21AQI
23AQI
36AQI
42AQI
24AQI
16AQI
12AQI
13AQI
16AQI
17AQI
13AQI
12AQI
13AQI
14AQI
16AQI
16AQI
17AQI
14AQI
14AQI
11AQI
16AQI
20AQI
24AQI
16AQI
14AQI
13AQI
10AQI
10AQI
12AQI
14AQI
16AQI
22AQI
19AQI
16AQI
23AQI
17AQI
21AQI
22AQI
20AQI
23AQI
19AQI
18AQI
17AQI
23AQI
22AQI
21AQI
24AQI
21AQI
30AQI
29AQI
30AQI
35AQI
20AQI
21AQI
17AQI
20AQI
14AQI
17AQI
20AQI
27AQI
34AQI
50AQI
45AQI
36AQI
27AQI
26AQI
27AQI
24AQI
31AQI
18AQI
15AQI
19AQI
19AQI
19AQI
24AQI
27AQI
22AQI
18AQI
27AQI
14AQI
15AQI
17AQI
16AQI
18AQI
20AQI
24AQI
16AQI
17AQI
15AQI
18AQI
18AQI
17AQI
18AQI
24AQI
35AQI
30AQI
17AQI
17AQI
15AQI
17AQI
17AQI
17AQI
18AQI
21AQI
27AQI
21AQI
23AQI
19AQI
19AQI
23AQI
23AQI
21AQI
28AQI
26AQI
25AQI
19AQI
29AQI
20AQI
23AQI
25AQI
24AQI
27AQI
25AQI
23AQI
25AQI
25AQI
26AQI
23AQI
24AQI
26AQI
26AQI
27AQI
32AQI
37AQI
37AQI
43AQI
37AQI
37AQI
34AQI
43AQI
35AQI
37AQI
29AQI
34AQI
29AQI
29AQI
35AQI
39AQI
30AQI
29AQI
28AQI
29AQI
32AQI
37AQI
33AQI
33AQI
32AQI
47AQI
56AQI
58AQI
52AQI
39AQI
34AQI
38AQI
27AQI
25AQI
46AQI
52AQI
49AQI
38AQI
31AQI
41AQI
36AQI
43AQI
30AQI
27AQI
27AQI
39AQI
48AQI
49AQI
47AQI
43AQI
43AQI
27AQI
40AQI
50AQI
56AQI
55AQI
46AQI
41AQI
26AQI
26AQI
25AQI
30AQI
38AQI
32AQI
22AQI
20AQI
24AQI
20AQI
29AQI
37AQI
39AQI
No. of days
202527AQI
Highest AQI recorded in
August39AQI
Lowest AQI recorded in
March20AQI
202421AQI
Highest AQI recorded in
December40AQI
Lowest AQI recorded in
May14AQI
202319AQI
Highest AQI recorded in
November26AQI
Lowest AQI recorded in
June14AQI
202223AQI
Highest AQI recorded in
January40AQI
Lowest AQI recorded in
July13AQI
202126AQI
Highest AQI recorded in
August43AQI
Lowest AQI recorded in
May15AQI
202025AQI
Highest AQI recorded in
August41AQI
Lowest AQI recorded in
March12AQI
Most & Least Polluted Years Over the Last 6 Years
Grand Junction's annual 2025 AQI (27) shows an average percentage change of 22.1% (worsened AQI) compared to previous years: 2020 (25), 2021 (26), 2022 (23), 2023 (19), 2024 (21).