Oregon City, Oregon, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
March Air Quality Analysis
Oregon City, Oregon, United States
AQI Trends: Highest and Lowest
Same Day Analysis (8th March):
On this day, AQI across the 2 years varied significantly: 2026 ranks 1st highest AQI at 40 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 8th Mar - 9th Mar 2026
Oregon City, Oregon, United States
7 AM8th Mar 2026
5 PM
6 AM9th Mar 2026
74AQI
33AQI
46AQI
32AQI
In the last 24 hours,
Oregon City's AQI reached its highest point of 74 at 1 PM during the Day, while the lowest point, 32, was recorded at 5 AM during the Night between 8th Mar and 9th Mar 2026.
Day & Night AQI Trend : Feb - Mar 2026
Oregon City, Oregon, United States
10°C7/11°C
8°C6/12°C
7°C3/15°C
8°C4/15°C
6°C2/13°C
8°C4/12°C
7°C5/9°C
7°C4/10°C
5°C2/6°C
3°C1/7°C
3°C0/6°C
4°C1/7°C
4°C0/10°C
7°C4/15°C
9°C6/13°C
8°C5/10°C
6°C5/8°C
6°C2/10°C
6°C1/13°C
7°C2/14°C
7°C1/14°C
10°C4/18°C
11°C8/16°C
10°C6/14°C
10°C8/11°C
8°C6/9°C
8°C5/11°C
12°C10/18°C
9°C6/11°C
5°C3/8°C
58AQI
41AQI
41AQI
34AQI
2026 Days Vs Air Quality
Oregon City, Oregon, United States
94%
63
6%
4
Total number of days with different AQI categories in last 69 days in 2026 (296 days remaining)
Under WHO’s Safe Air Quality Limits: 94%
Health Risk Level:
Very Low
In 2026, 94% of 69 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
Oregon City, Oregon, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
49AQI (US)
23AQI (US)
18AQI (US)
9AQI (US)
17AQI (US)
18AQI (US)
10AQI (US)
11AQI (US)
13AQI (US)
26AQI (US)
36AQI (US)
25AQI (US)
43AQI (US)
40AQI (US)
34AQI (US)
11AQI (US)
15AQI (US)
19AQI (US)
16AQI (US)
21AQI (US)
25AQI (US)
52AQI (US)
54AQI (US)
48AQI (US)
46AQI (US)
48AQI (US)
38AQI (US)
44AQI (US)
50AQI (US)
52AQI (US)
42AQI (US)
48AQI (US)
48AQI (US)
49AQI (US)
45AQI (US)
49AQI (US)
39AQI (US)
39AQI (US)
44AQI (US)
46AQI (US)
45AQI (US)
40AQI (US)
41AQI (US)
48AQI (US)
46AQI (US)
38AQI (US)
44AQI (US)
45AQI (US)
41AQI (US)
42AQI (US)
38AQI (US)
35AQI (US)
38AQI (US)
40AQI (US)
47AQI (US)
42AQI (US)
35AQI (US)
38AQI (US)
38AQI (US)
41AQI (US)
58AQI (US)
45AQI (US)
48AQI (US)
40AQI (US)
32AQI (US)
41AQI (US)
40AQI (US)
31AQI (US)
42AQI (US)
43AQI (US)
No. of days
202637AQI (US)
Highest AQI (US) recorded in
March43AQI (US)
Lowest AQI (US) recorded in
January31AQI (US)
202526AQI (US)
Highest AQI (US) recorded in
October38AQI (US)
Lowest AQI (US) recorded in
March17AQI (US)
Most & Least Polluted Years Over the Last 2 Years
Oregon City's annual 2026 AQI (US) (37) shows an average percentage change of 41.2% (worsened AQI (US)) compared to previous years: 2025 (26).