Pm2.5, 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!
October Air Quality Analysis
Pm2.5, Grand Junction, Colorado, United States
AQI Trends: Highest and Lowest
Same Day Analysis (22nd October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 28 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 22nd Oct - 23rd Oct 2025
Pm2.5, Grand Junction, Colorado, United States
7 AM22nd Oct 2025
6 PM
6 AM23rd Oct 2025
37AQI
18AQI
48AQI
22AQI
In the last 24 hours,
Pm2.5's AQI reached its highest point of 48 at 1 AM during the Night, while the lowest point, 18, was recorded at 8 AM during the Day between 22nd Oct and 23rd Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Pm2.5, Grand Junction, Colorado, United States
17°C11/25°C
18°C9/28°C
19°C8/29°C
20°C9/29°C
21°C12/31°C
20°C15/28°C
19°C11/28°C
21°C12/30°C
20°C12/29°C
21°C12/32°C
24°C17/33°C
18°C13/24°C
15°C6/24°C
15°C7/26°C
17°C7/27°C
18°C7/29°C
22°C14/30°C
17°C14/22°C
16°C12/21°C
13°C8/18°C
11°C7/18°C
17°C12/26°C
17°C10/26°C
11°C6/18°C
10°C3/18°C
11°C3/20°C
13°C4/24°C
14°C8/22°C
13°C4/22°C
12°C4/22°C
--°C/°C
25AQI
18AQI
27AQI
19AQI
2025 Days Vs Air Quality
Pm2.5, Grand Junction, Colorado, United States
98%
289
2%
6
Total number of days with different AQI categories in last 296 days in 2025 (69 days remaining)
Under WHO’s Safe Air Quality Limits: 98%
Health Risk Level:
Very Low
In 2025, 98% of 296 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
Pm2.5, 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
22AQI
21AQI
28AQI
27AQI
28AQI
33AQI
19AQI
21AQI
16AQI
20AQI
14AQI
16AQI
19AQI
27AQI
33AQI
49AQI
43AQI
34AQI
27AQI
26AQI
25AQI
23AQI
30AQI
17AQI
15AQI
18AQI
18AQI
18AQI
23AQI
26AQI
21AQI
18AQI
26AQI
14AQI
15AQI
16AQI
15AQI
18AQI
20AQI
23AQI
16AQI
16AQI
15AQI
18AQI
18AQI
17AQI
18AQI
23AQI
34AQI
27AQI
16AQI
18AQI
14AQI
16AQI
16AQI
17AQI
17AQI
20AQI
27AQI
20AQI
23AQI
19AQI
19AQI
22AQI
22AQI
20AQI
27AQI
26AQI
25AQI
18AQI
28AQI
19AQI
22AQI
24AQI
23AQI
26AQI
25AQI
23AQI
25AQI
25AQI
26AQI
23AQI
24AQI
25AQI
26AQI
27AQI
31AQI
32AQI
30AQI
40AQI
38AQI
38AQI
35AQI
42AQI
35AQI
37AQI
30AQI
34AQI
28AQI
28AQI
35AQI
39AQI
31AQI
29AQI
28AQI
29AQI
32AQI
37AQI
33AQI
33AQI
31AQI
46AQI
55AQI
58AQI
53AQI
41AQI
34AQI
37AQI
28AQI
25AQI
46AQI
52AQI
49AQI
38AQI
31AQI
40AQI
35AQI
43AQI
30AQI
27AQI
27AQI
38AQI
48AQI
49AQI
49AQI
44AQI
44AQI
29AQI
40AQI
50AQI
56AQI
55AQI
47AQI
41AQI
26AQI
26AQI
25AQI
30AQI
37AQI
35AQI
34AQI
27AQI
32AQI
31AQI
30AQI
30AQI
40AQI
43AQI
45AQI
37AQI
39AQI
44AQI
49AQI
48AQI
50AQI
36AQI
27AQI
26AQI
23AQI
21AQI
20AQI
18AQI
19AQI
24AQI
24AQI
23AQI
24AQI
26AQI
27AQI
19AQI
20AQI
18AQI
18AQI
19AQI
16AQI
18AQI
13AQI
16AQI
21AQI
22AQI
26AQI
25AQI
22AQI
27AQI
24AQI
26AQI
32AQI
29AQI
25AQI
20AQI
17AQI
18AQI
23AQI
20AQI
21AQI
19AQI
27AQI
29AQI
24AQI
23AQI
28AQI
32AQI
22AQI
20AQI
23AQI
20AQI
28AQI
37AQI
38AQI
26AQI
24AQI
No. of days
202527AQI
Highest AQI recorded in
August38AQI
Lowest AQI recorded in
May20AQI
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
Pm2.5's annual 2025 AQI (27) shows an average percentage change of 20.4% (worsened AQI) compared to previous years: 2020 (25), 2021 (26), 2022 (23), 2023 (19), 2024 (21).