Salem, Salem, Oregon, 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
Salem, Salem, Oregon, United States
AQI Trends: Highest and Lowest
Same Day Analysis (6th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 19 of Good air quality, showing improvement over 2024 and 2023 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 6th Aug - 7th Aug 2025
Salem, Salem, Oregon, United States
5 AM6th Aug 2025
8 PM
4 AM7th Aug 2025
20AQI
16AQI
19AQI
15AQI
In the last 24 hours,
Salem's AQI reached its highest point of 20 at 11 AM during the Day, while the lowest point, 15, was recorded at 4 AM during the Night between 6th Aug and 7th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Salem, Salem, Oregon, United States
--°C/°C
19°C14/27°C
20°C16/25°C
22°C13/33°C
23°C15/33°C
25°C16/36°C
22°C13/31°C
22°C11/34°C
26°C15/37°C
21°C11/31°C
19°C12/29°C
19°C13/29°C
17°C11/23°C
19°C15/25°C
20°C11/31°C
23°C13/34°C
21°C13/31°C
19°C11/28°C
17°C11/21°C
18°C12/26°C
20°C10/31°C
23°C12/35°C
23°C14/34°C
22°C14/32°C
22°C14/32°C
19°C13/24°C
18°C15/22°C
18°C13/24°C
19°C10/30°C
19°C15/26°C
20°C15/25°C
21AQI
19AQI
20AQI
19AQI
2025 Days Vs Air Quality
Salem, Salem, Oregon, United States
96%
210
4%
8
Total number of days with different AQI categories in last 220 days in 2025 (145 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2025, 96% of 220 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
Salem, Salem, Oregon, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
31AQI
33AQI
22AQI
18AQI
19AQI
25AQI
28AQI
41AQI
44AQI
35AQI
20AQI
29AQI
37AQI
45AQI
51AQI
40AQI
42AQI
38AQI
47AQI
39AQI
55AQI
60AQI
56AQI
61AQI
33AQI
30AQI
47AQI
59AQI
68AQI
56AQI
31AQI
19AQI
21AQI
21AQI
39AQI
26AQI
24AQI
23AQI
22AQI
29AQI
33AQI
23AQI
28AQI
24AQI
29AQI
42AQI
23AQI
17AQI
19AQI
21AQI
20AQI
28AQI
20AQI
17AQI
22AQI
20AQI
31AQI
31AQI
39AQI
37AQI
23AQI
18AQI
20AQI
22AQI
23AQI
25AQI
27AQI
24AQI
20AQI
31AQI
18AQI
16AQI
17AQI
16AQI
15AQI
16AQI
15AQI
19AQI
13AQI
14AQI
18AQI
16AQI
18AQI
29AQI
35AQI
16AQI
16AQI
15AQI
24AQI
16AQI
25AQI
17AQI
19AQI
28AQI
37AQI
23AQI
14AQI
13AQI
17AQI
25AQI
19AQI
19AQI
21AQI
21AQI
29AQI
26AQI
26AQI
28AQI
22AQI
17AQI
15AQI
17AQI
23AQI
28AQI
31AQI
27AQI
20AQI
13AQI
15AQI
20AQI
33AQI
23AQI
14AQI
16AQI
18AQI
23AQI
23AQI
20AQI
24AQI
19AQI
15AQI
18AQI
16AQI
22AQI
22AQI
23AQI
14AQI
16AQI
18AQI
13AQI
15AQI
17AQI
16AQI
20AQI
16AQI
15AQI
18AQI
24AQI
14AQI
20AQI
19AQI
18AQI
21AQI
23AQI
15AQI
17AQI
22AQI
20AQI
31AQI
33AQI
31AQI
32AQI
29AQI
21AQI
20AQI
21AQI
20AQI
19AQI
14AQI
16AQI
16AQI
11AQI
12AQI
21AQI
30AQI
30AQI
16AQI
13AQI
14AQI
19AQI
24AQI
20AQI
15AQI
14AQI
17AQI
20AQI
19AQI
19AQI
23AQI
15AQI
14AQI
18AQI
20AQI
21AQI
16AQI
21AQI
23AQI
28AQI
28AQI
21AQI
21AQI
22AQI
23AQI
21AQI
18AQI
17AQI
16AQI
21AQI
20AQI
19AQI
22AQI
23AQI
18AQI
17AQI
21AQI
24AQI
29AQI
19AQI
40AQI
25AQI
20AQI
22AQI
19AQI
21AQI
20AQI
21AQI
No. of days
202524AQI
Highest AQI recorded in
January40AQI
Lowest AQI recorded in
May19AQI
202426AQI
Highest AQI recorded in
December35AQI
Lowest AQI recorded in
May16AQI
202330AQI
Highest AQI recorded in
November47AQI
Lowest AQI recorded in
April13AQI
202232AQI
Highest AQI recorded in
October54AQI
Lowest AQI recorded in
June19AQI
202126AQI
Highest AQI recorded in
March31AQI
Lowest AQI recorded in
December19AQI
202038AQI
Highest AQI recorded in
September115AQI
Lowest AQI recorded in
June18AQI
Most & Least Polluted Years Over the Last 6 Years
Salem's annual 2025 AQI (24) shows an average percentage change of -19.1% (improved AQI) compared to previous years: 2020 (38), 2021 (26), 2022 (32), 2023 (30), 2024 (26).