Chehalis, Washington, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
June Air Quality Analysis
Chehalis, Washington, United States
AQI Trends: Highest and Lowest
Same Day Analysis (3rd June):
On this day, AQI across the 5 years varied significantly: 2026 ranks 1st highest AQI at 30 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 2nd Jun - 3rd Jun 2026
Chehalis, Washington, United States
5 AM2nd Jun 2026
8 PM
4 AM3rd Jun 2026
34AQI
29AQI
32AQI
30AQI
In the last 24 hours,
Chehalis's AQI reached its highest point of 34 at 8 AM during the Day, while the lowest point, 29, was recorded at 6 AM during the Day between 2nd Jun and 3rd Jun 2026.
Day & Night AQI Trend : May - Jun 2026
Chehalis, Washington, United States
15°C10/19°C
13°C11/16°C
13°C9/19°C
12°C7/17°C
15°C7/24°C
14°C9/18°C
16°C9/25°C
18°C9/28°C
13°C11/16°C
12°C10/15°C
9°C6/12°C
10°C6/15°C
10°C3/17°C
13°C7/22°C
12°C6/16°C
12°C5/20°C
17°C8/27°C
17°C9/27°C
14°C10/19°C
15°C7/23°C
13°C10/15°C
13°C7/18°C
17°C8/25°C
18°C11/28°C
13°C8/17°C
12°C6/18°C
13°C6/22°C
17°C6/27°C
20°C9/31°C
17°C14/21°C
42AQI
36AQI
39AQI
34AQI
2026 Days Vs Air Quality
Chehalis, Washington, United States
95%
144
5%
7
Total number of days with different AQI categories in last 154 days in 2026 (211 days remaining)
Under WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2026, 95% of 154 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
Chehalis, Washington, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
47AQI (US)
42AQI (US)
32AQI (US)
12AQI (US)
15AQI (US)
24AQI (US)
13AQI (US)
14AQI (US)
20AQI (US)
23AQI (US)
24AQI (US)
20AQI (US)
25AQI (US)
26AQI (US)
24AQI (US)
23AQI (US)
44AQI (US)
60AQI (US)
60AQI (US)
44AQI (US)
46AQI (US)
49AQI (US)
52AQI (US)
50AQI (US)
48AQI (US)
46AQI (US)
44AQI (US)
46AQI (US)
49AQI (US)
48AQI (US)
44AQI (US)
47AQI (US)
50AQI (US)
50AQI (US)
49AQI (US)
46AQI (US)
42AQI (US)
36AQI (US)
44AQI (US)
46AQI (US)
46AQI (US)
46AQI (US)
44AQI (US)
50AQI (US)
50AQI (US)
44AQI (US)
42AQI (US)
44AQI (US)
44AQI (US)
41AQI (US)
42AQI (US)
36AQI (US)
35AQI (US)
39AQI (US)
41AQI (US)
42AQI (US)
36AQI (US)
36AQI (US)
35AQI (US)
38AQI (US)
48AQI (US)
50AQI (US)
46AQI (US)
44AQI (US)
39AQI (US)
39AQI (US)
40AQI (US)
42AQI (US)
36AQI (US)
40AQI (US)
42AQI (US)
40AQI (US)
38AQI (US)
36AQI (US)
36AQI (US)
33AQI (US)
32AQI (US)
32AQI (US)
36AQI (US)
38AQI (US)
36AQI (US)
40AQI (US)
36AQI (US)
34AQI (US)
30AQI (US)
30AQI (US)
34AQI (US)
32AQI (US)
28AQI (US)
25AQI (US)
30AQI (US)
33AQI (US)
28AQI (US)
28AQI (US)
30AQI (US)
26AQI (US)
26AQI (US)
30AQI (US)
28AQI (US)
30AQI (US)
32AQI (US)
28AQI (US)
32AQI (US)
34AQI (US)
35AQI (US)
30AQI (US)
32AQI (US)
33AQI (US)
30AQI (US)
28AQI (US)
23AQI (US)
27AQI (US)
30AQI (US)
32AQI (US)
30AQI (US)
25AQI (US)
24AQI (US)
26AQI (US)
27AQI (US)
24AQI (US)
22AQI (US)
27AQI (US)
32AQI (US)
32AQI (US)
30AQI (US)
26AQI (US)
36AQI (US)
33AQI (US)
28AQI (US)
27AQI (US)
26AQI (US)
38AQI (US)
52AQI (US)
56AQI (US)
58AQI (US)
56AQI (US)
50AQI (US)
46AQI (US)
46AQI (US)
50AQI (US)
48AQI (US)
44AQI (US)
34AQI (US)
28AQI (US)
28AQI (US)
26AQI (US)
27AQI (US)
29AQI (US)
30AQI (US)
31AQI (US)
30AQI (US)
36AQI (US)
43AQI (US)
37AQI (US)
29AQI (US)
36AQI (US)
30AQI (US)
No. of days
202636AQI (US)
Highest AQI (US) recorded in
February43AQI (US)
Lowest AQI (US) recorded in
April29AQI (US)
202526AQI (US)
Highest AQI (US) recorded in
January39AQI (US)
Lowest AQI (US) recorded in
May16AQI (US)
202420AQI (US)
Highest AQI (US) recorded in
December31AQI (US)
Lowest AQI (US) recorded in
June13AQI (US)
202323AQI (US)
Highest AQI (US) recorded in
November37AQI (US)
Lowest AQI (US) recorded in
April14AQI (US)
202229AQI (US)
Highest AQI (US) recorded in
October72AQI (US)
Lowest AQI (US) recorded in
May12AQI (US)
202120AQI (US)
Highest AQI (US) recorded in
January28AQI (US)
Lowest AQI (US) recorded in
May14AQI (US)
202030AQI (US)
Highest AQI (US) recorded in
September69AQI (US)
Lowest AQI (US) recorded in
June20AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Chehalis's annual 2026 AQI (US) (36) shows an average percentage change of 49.8% (worsened AQI (US)) compared to previous years: 2020 (30), 2021 (20), 2022 (29), 2023 (23), 2024 (20), 2025 (26).