Gresham, Oregon, 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
Gresham, Oregon, United States
AQI Trends: Highest and Lowest
Same Day Analysis (25th September):
On this day, AQI across the 2 years varied significantly: 2026 ranks 1st highest AQI at 44 of Good air quality on the same day.
Day & Night AQI Trend: 24th Sep - 25th Sep 2026
Gresham, Oregon, United States
6 AM24th Sep 2026
7 PM
5 AM25th Sep 2026
84AQI
48AQI
54AQI
44AQI
In the last 24 hours,
Gresham's AQI reached its highest point of 84 at 6 AM during the Day, while the lowest point, 44, was recorded at 10 PM during the Night between 24th Sep and 25th Sep 2026.
Day & Night AQI Trend : Aug - Sep 2026
Gresham, Oregon, United States
21°C16/28°C
19°C13/26°C
17°C13/22°C
17°C10/26°C
22°C11/33°C
18°C13/23°C
15°C13/19°C
15°C12/19°C
15°C12/20°C
16°C11/23°C
15°C14/17°C
17°C12/22°C
19°C10/28°C
21°C13/31°C
19°C13/25°C
15°C10/21°C
16°C11/21°C
13°C10/17°C
15°C11/21°C
14°C11/16°C
19°C11/27°C
19°C13/27°C
18°C12/24°C
17°C11/24°C
18°C11/27°C
17°C12/24°C
16°C12/22°C
16°C11/22°C
15°C10/21°C
14°C10/18°C
55AQI
41AQI
52AQI
42AQI
2026 Days Vs Air Quality
Gresham, Oregon, United States
82%
216
18%
49
Total number of days with different AQI categories in last 268 days in 2026 (97 days remaining)
Under WHO’s Safe Air Quality Limits: 82%
Health Risk Level:
Low
In 2026, 82% of 268 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Gresham, Oregon, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
28AQI (US)
18AQI (US)
27AQI (US)
12AQI (US)
20AQI (US)
28AQI (US)
11AQI (US)
11AQI (US)
14AQI (US)
49AQI (US)
48AQI (US)
43AQI (US)
60AQI (US)
61AQI (US)
41AQI (US)
17AQI (US)
20AQI (US)
26AQI (US)
20AQI (US)
27AQI (US)
26AQI (US)
48AQI (US)
54AQI (US)
48AQI (US)
45AQI (US)
46AQI (US)
44AQI (US)
47AQI (US)
52AQI (US)
49AQI (US)
45AQI (US)
48AQI (US)
49AQI (US)
49AQI (US)
48AQI (US)
47AQI (US)
39AQI (US)
40AQI (US)
46AQI (US)
46AQI (US)
46AQI (US)
40AQI (US)
42AQI (US)
48AQI (US)
48AQI (US)
39AQI (US)
44AQI (US)
46AQI (US)
40AQI (US)
41AQI (US)
38AQI (US)
34AQI (US)
37AQI (US)
40AQI (US)
46AQI (US)
41AQI (US)
36AQI (US)
34AQI (US)
39AQI (US)
40AQI (US)
55AQI (US)
46AQI (US)
46AQI (US)
41AQI (US)
38AQI (US)
40AQI (US)
40AQI (US)
40AQI (US)
35AQI (US)
43AQI (US)
42AQI (US)
40AQI (US)
35AQI (US)
36AQI (US)
36AQI (US)
33AQI (US)
32AQI (US)
31AQI (US)
37AQI (US)
37AQI (US)
37AQI (US)
39AQI (US)
37AQI (US)
31AQI (US)
28AQI (US)
29AQI (US)
31AQI (US)
29AQI (US)
26AQI (US)
25AQI (US)
31AQI (US)
31AQI (US)
26AQI (US)
31AQI (US)
28AQI (US)
26AQI (US)
26AQI (US)
30AQI (US)
28AQI (US)
31AQI (US)
30AQI (US)
26AQI (US)
33AQI (US)
33AQI (US)
32AQI (US)
29AQI (US)
28AQI (US)
32AQI (US)
26AQI (US)
26AQI (US)
23AQI (US)
26AQI (US)
28AQI (US)
32AQI (US)
25AQI (US)
23AQI (US)
23AQI (US)
25AQI (US)
26AQI (US)
23AQI (US)
23AQI (US)
30AQI (US)
32AQI (US)
30AQI (US)
28AQI (US)
27AQI (US)
34AQI (US)
29AQI (US)
26AQI (US)
27AQI (US)
25AQI (US)
47AQI (US)
52AQI (US)
58AQI (US)
57AQI (US)
55AQI (US)
50AQI (US)
41AQI (US)
49AQI (US)
49AQI (US)
47AQI (US)
43AQI (US)
27AQI (US)
28AQI (US)
27AQI (US)
26AQI (US)
28AQI (US)
29AQI (US)
31AQI (US)
31AQI (US)
29AQI (US)
25AQI (US)
28AQI (US)
25AQI (US)
24AQI (US)
27AQI (US)
26AQI (US)
27AQI (US)
27AQI (US)
26AQI (US)
25AQI (US)
24AQI (US)
26AQI (US)
27AQI (US)
28AQI (US)
27AQI (US)
24AQI (US)
24AQI (US)
22AQI (US)
25AQI (US)
24AQI (US)
24AQI (US)
25AQI (US)
27AQI (US)
29AQI (US)
27AQI (US)
25AQI (US)
26AQI (US)
26AQI (US)
27AQI (US)
28AQI (US)
25AQI (US)
25AQI (US)
28AQI (US)
29AQI (US)
27AQI (US)
29AQI (US)
32AQI (US)
30AQI (US)
29AQI (US)
31AQI (US)
30AQI (US)
28AQI (US)
28AQI (US)
59AQI (US)
54AQI (US)
46AQI (US)
47AQI (US)
55AQI (US)
56AQI (US)
48AQI (US)
58AQI (US)
61AQI (US)
61AQI (US)
54AQI (US)
51AQI (US)
50AQI (US)
62AQI (US)
50AQI (US)
47AQI (US)
54AQI (US)
62AQI (US)
71AQI (US)
72AQI (US)
72AQI (US)
53AQI (US)
47AQI (US)
83AQI (US)
63AQI (US)
58AQI (US)
62AQI (US)
63AQI (US)
46AQI (US)
63AQI (US)
56AQI (US)
53AQI (US)
51AQI (US)
46AQI (US)
50AQI (US)
44AQI (US)
63AQI (US)
55AQI (US)
41AQI (US)
52AQI (US)
61AQI (US)
63AQI (US)
65AQI (US)
61AQI (US)
64AQI (US)
62AQI (US)
63AQI (US)
54AQI (US)
52AQI (US)
41AQI (US)
35AQI (US)
49AQI (US)
36AQI (US)
42AQI (US)
50AQI (US)
48AQI (US)
48AQI (US)
52AQI (US)
36AQI (US)
27AQI (US)
46AQI (US)
38AQI (US)
43AQI (US)
48AQI (US)
45AQI (US)
46AQI (US)
46AQI (US)
54AQI (US)
50AQI (US)
59AQI (US)
44AQI (US)
35AQI (US)
43AQI (US)
37AQI (US)
28AQI (US)
36AQI (US)
26AQI (US)
41AQI (US)
58AQI (US)
46AQI (US)
No. of days
202639AQI (US)
Highest AQI (US) recorded in
August58AQI (US)
Lowest AQI (US) recorded in
June26AQI (US)
202527AQI (US)
Highest AQI (US) recorded in
November40AQI (US)
Lowest AQI (US) recorded in
May17AQI (US)
Most & Least Polluted Years Over the Last 2 Years
Gresham's annual 2026 AQI (US) (39) shows an average percentage change of 44.4% (worsened AQI (US)) compared to previous years: 2025 (27).