Plymouth, Michigan, 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
Plymouth, Michigan, United States
AQI Trends: Highest and Lowest
Same Day Analysis (17th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 38 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 18th Oct - 19th Oct 2025
Plymouth, Michigan, United States
7 AM18th Oct 2025
7 PM
6 AM19th Oct 2025
AQI
AQI
58AQI
37AQI
In the last 24 hours,
Plymouth's AQI reached its highest point of 58 at 10 PM during the Night, while the lowest point, undefined, was recorded at 6 AM during the Night between 18th Oct and 19th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Plymouth, Michigan, United States
20°C17/23°C
20°C16/27°C
22°C15/30°C
21°C17/27°C
20°C16/25°C
19°C18/22°C
19°C17/23°C
20°C14/29°C
21°C14/32°C
22°C15/30°C
20°C11/31°C
20°C11/30°C
18°C13/24°C
18°C10/29°C
20°C10/32°C
22°C14/32°C
22°C16/31°C
22°C15/32°C
18°C12/21°C
11°C8/15°C
10°C4/20°C
13°C4/21°C
14°C9/18°C
14°C7/22°C
16°C10/24°C
14°C7/23°C
14°C11/21°C
11°C4/21°C
13°C6/22°C
--°C/°C
--°C/°C
39AQI
33AQI
40AQI
33AQI
2025 Days Vs Air Quality
Plymouth, Michigan, United States
75%
154
23%
48
1%
3
Total number of days with different AQI categories in last 291 days in 2025 (74 days remaining)
Under WHO’s Safe Air Quality Limits: 75%
Health Risk Level:
Low
In 2025, 75% of 291 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
Plymouth, Michigan, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
38AQI
48AQI
48AQI
37AQI
19AQI
19AQI
26AQI
22AQI
21AQI
21AQI
20AQI
23AQI
17AQI
29AQI
35AQI
37AQI
30AQI
36AQI
31AQI
18AQI
16AQI
30AQI
45AQI
42AQI
23AQI
25AQI
17AQI
37AQI
51AQI
45AQI
25AQI
27AQI
28AQI
38AQI
20AQI
30AQI
32AQI
19AQI
19AQI
29AQI
27AQI
28AQI
22AQI
24AQI
32AQI
22AQI
30AQI
24AQI
25AQI
31AQI
33AQI
24AQI
21AQI
19AQI
18AQI
21AQI
15AQI
12AQI
13AQI
21AQI
26AQI
26AQI
20AQI
31AQI
35AQI
32AQI
25AQI
33AQI
56AQI
70AQI
83AQI
90AQI
71AQI
92AQI
73AQI
55AQI
69AQI
76AQI
52AQI
42AQI
45AQI
43AQI
36AQI
37AQI
23AQI
38AQI
44AQI
46AQI
55AQI
54AQI
45AQI
48AQI
40AQI
28AQI
34AQI
33AQI
30AQI
41AQI
51AQI
53AQI
67AQI
56AQI
37AQI
54AQI
56AQI
49AQI
49AQI
43AQI
46AQI
72AQI
87AQI
75AQI
30AQI
21AQI
26AQI
25AQI
54AQI
29AQI
33AQI
51AQI
32AQI
51AQI
31AQI
37AQI
36AQI
47AQI
130AQI
74AQI
59AQI
90AQI
121AQI
105AQI
86AQI
75AQI
64AQI
57AQI
58AQI
55AQI
50AQI
42AQI
68AQI
74AQI
64AQI
37AQI
19AQI
26AQI
18AQI
22AQI
31AQI
34AQI
24AQI
18AQI
23AQI
28AQI
35AQI
20AQI
30AQI
39AQI
42AQI
38AQI
43AQI
34AQI
40AQI
23AQI
25AQI
29AQI
34AQI
44AQI
52AQI
51AQI
58AQI
60AQI
53AQI
46AQI
51AQI
54AQI
44AQI
22AQI
27AQI
38AQI
30AQI
31AQI
36AQI
29AQI
40AQI
42AQI
34AQI
35AQI
25AQI
28AQI
50AQI
58AQI
59AQI
44AQI
15AQI
15AQI
21AQI
33AQI
31AQI
39AQI
35AQI
53AQI
21AQI
28AQI
38AQI
38AQI
28AQI
25AQI
51AQI
48AQI
50AQI
40AQI
35AQI
No. of days
202540AQI
Highest AQI recorded in
June51AQI
Lowest AQI recorded in
May25AQI
Most & Least Polluted Years Over the Last 1 Years
Plymouth's annual 2025 AQI (40) shows an average percentage change of NaN% (improved AQI) compared to previous years: .