Port Huron, Port Huron, 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
Port Huron, Port Huron, Michigan, United States
AQI Trends: Highest and Lowest
Same Day Analysis (7th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 18 of Good air quality, showing improvement over 2024, 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 7th Oct - 8th Oct 2025
Port Huron, Port Huron, Michigan, United States
7 AM7th Oct 2025
7 PM
6 AM8th Oct 2025
38AQI
13AQI
43AQI
12AQI
In the last 24 hours,
Port Huron's AQI reached its highest point of 43 at 3 AM during the Night, while the lowest point, 12, was recorded at 11 PM during the Night between 7th Oct and 8th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Port Huron, Port Huron, Michigan, United States
--°C/°C
15°C7/25°C
16°C9/24°C
17°C12/24°C
18°C13/25°C
17°C12/21°C
19°C12/27°C
19°C15/28°C
18°C13/25°C
17°C12/23°C
19°C13/28°C
17°C16/18°C
17°C11/25°C
20°C12/31°C
21°C18/26°C
21°C16/27°C
20°C16/25°C
18°C15/21°C
19°C13/29°C
21°C13/30°C
19°C14/25°C
17°C8/29°C
17°C9/26°C
16°C9/24°C
16°C7/28°C
18°C8/30°C
22°C13/33°C
23°C15/32°C
23°C16/31°C
17°C13/19°C
12°C9/15°C
39AQI
36AQI
40AQI
38AQI
2025 Days Vs Air Quality
Port Huron, Port Huron, Michigan, United States
82%
229
17%
47
1%
4
Total number of days with different AQI categories in last 282 days in 2025 (83 days remaining)
Under WHO’s Safe Air Quality Limits: 82%
Health Risk Level:
Low
In 2025, 82% of 282 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
Port Huron, Port Huron, Michigan, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
19AQI
23AQI
20AQI
20AQI
22AQI
21AQI
22AQI
22AQI
26AQI
59AQI
57AQI
52AQI
30AQI
25AQI
27AQI
53AQI
36AQI
29AQI
24AQI
22AQI
26AQI
30AQI
41AQI
35AQI
60AQI
45AQI
33AQI
24AQI
23AQI
30AQI
48AQI
23AQI
35AQI
51AQI
23AQI
23AQI
32AQI
25AQI
42AQI
31AQI
39AQI
44AQI
33AQI
29AQI
40AQI
50AQI
36AQI
27AQI
25AQI
24AQI
26AQI
26AQI
53AQI
60AQI
54AQI
42AQI
39AQI
51AQI
25AQI
29AQI
28AQI
35AQI
39AQI
30AQI
29AQI
29AQI
31AQI
29AQI
36AQI
31AQI
27AQI
36AQI
49AQI
43AQI
22AQI
18AQI
25AQI
33AQI
22AQI
20AQI
17AQI
17AQI
20AQI
18AQI
19AQI
37AQI
39AQI
40AQI
39AQI
20AQI
16AQI
19AQI
20AQI
18AQI
19AQI
16AQI
19AQI
15AQI
28AQI
30AQI
29AQI
23AQI
36AQI
26AQI
14AQI
15AQI
26AQI
41AQI
37AQI
17AQI
22AQI
16AQI
38AQI
48AQI
38AQI
18AQI
20AQI
25AQI
34AQI
15AQI
26AQI
23AQI
15AQI
17AQI
22AQI
29AQI
26AQI
17AQI
19AQI
29AQI
22AQI
34AQI
26AQI
21AQI
27AQI
31AQI
22AQI
16AQI
13AQI
16AQI
19AQI
12AQI
11AQI
13AQI
27AQI
24AQI
27AQI
19AQI
30AQI
34AQI
23AQI
22AQI
28AQI
45AQI
70AQI
79AQI
87AQI
72AQI
95AQI
80AQI
54AQI
71AQI
77AQI
41AQI
34AQI
35AQI
35AQI
37AQI
32AQI
22AQI
35AQI
39AQI
42AQI
53AQI
53AQI
40AQI
49AQI
42AQI
28AQI
39AQI
32AQI
29AQI
41AQI
51AQI
48AQI
53AQI
54AQI
31AQI
41AQI
56AQI
46AQI
49AQI
37AQI
41AQI
74AQI
94AQI
87AQI
39AQI
29AQI
33AQI
29AQI
46AQI
22AQI
26AQI
45AQI
32AQI
57AQI
32AQI
44AQI
37AQI
49AQI
120AQI
63AQI
45AQI
101AQI
133AQI
107AQI
91AQI
80AQI
71AQI
53AQI
62AQI
58AQI
49AQI
35AQI
70AQI
78AQI
67AQI
36AQI
16AQI
22AQI
17AQI
19AQI
24AQI
33AQI
24AQI
16AQI
22AQI
26AQI
31AQI
17AQI
24AQI
38AQI
31AQI
31AQI
34AQI
24AQI
37AQI
19AQI
21AQI
22AQI
24AQI
35AQI
46AQI
42AQI
56AQI
64AQI
52AQI
41AQI
42AQI
54AQI
33AQI
22AQI
24AQI
37AQI
37AQI
36AQI
29AQI
32AQI
33AQI
28AQI
26AQI
24AQI
35AQI
33AQI
57AQI
62AQI
63AQI
58AQI
18AQI
32AQI
36AQI
29AQI
25AQI
22AQI
49AQI
47AQI
49AQI
35AQI
47AQI
No. of days
202536AQI
Highest AQI recorded in
August49AQI
Lowest AQI recorded in
May22AQI
202432AQI
Highest AQI recorded in
October36AQI
Lowest AQI recorded in
April22AQI
202341AQI
Highest AQI recorded in
June83AQI
Lowest AQI recorded in
October31AQI
202237AQI
Highest AQI recorded in
November41AQI
Lowest AQI recorded in
August29AQI
202138AQI
Highest AQI recorded in
August47AQI
Lowest AQI recorded in
September30AQI
202034AQI
Highest AQI recorded in
June39AQI
Lowest AQI recorded in
November26AQI
Most & Least Polluted Years Over the Last 6 Years
Port Huron's annual 2025 AQI (36) shows an average percentage change of 0.2% (worsened AQI) compared to previous years: 2020 (34), 2021 (38), 2022 (37), 2023 (41), 2024 (32).