Green Bay, Wisconsin, 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
Green Bay, Wisconsin, United States
AQI Trends: Highest and Lowest
Same Day Analysis (16th October ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 42 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 16th Oct - 17th Oct 2025
Green Bay, Wisconsin, United States
6 AM16th Oct 2025
6 PM
5 AM17th Oct 2025
41AQI
18AQI
40AQI
16AQI
In the last 24 hours,
Green Bay's AQI reached its highest point of 41 at 10 AM during the Day, while the lowest point, undefined, was recorded at 5 AM during the Night between 16th Oct and 17th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Green Bay, Wisconsin, United States
22°C15/32°C
19°C16/20°C
18°C15/22°C
17°C15/20°C
20°C17/25°C
19°C17/23°C
18°C16/23°C
17°C14/21°C
18°C12/26°C
17°C12/21°C
19°C9/31°C
17°C7/28°C
19°C9/32°C
19°C13/27°C
19°C14/26°C
20°C12/30°C
24°C15/34°C
25°C17/34°C
24°C19/30°C
17°C14/20°C
14°C9/20°C
10°C3/16°C
10°C2/19°C
15°C10/21°C
10°C5/15°C
15°C10/21°C
16°C11/21°C
12°C8/17°C
11°C8/15°C
12°C6/19°C
--°C/°C
34AQI
32AQI
39AQI
35AQI
2025 Days Vs Air Quality
Green Bay, Wisconsin, United States
84%
244
14%
40
2%
5
Total number of days with different AQI categories in last 290 days in 2025 (75 days remaining)
Under WHO’s Safe Air Quality Limits: 84%
Health Risk Level:
Low
In 2025, 84% of 290 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
Green Bay, Wisconsin, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
21AQI
23AQI
19AQI
18AQI
19AQI
19AQI
20AQI
28AQI
40AQI
60AQI
29AQI
41AQI
21AQI
23AQI
28AQI
29AQI
25AQI
21AQI
21AQI
22AQI
22AQI
25AQI
24AQI
26AQI
27AQI
22AQI
23AQI
23AQI
24AQI
30AQI
29AQI
23AQI
43AQI
31AQI
24AQI
25AQI
30AQI
29AQI
32AQI
26AQI
34AQI
30AQI
34AQI
25AQI
39AQI
36AQI
25AQI
25AQI
24AQI
24AQI
25AQI
32AQI
42AQI
68AQI
38AQI
29AQI
43AQI
34AQI
25AQI
25AQI
25AQI
40AQI
48AQI
26AQI
26AQI
26AQI
27AQI
27AQI
27AQI
27AQI
26AQI
41AQI
44AQI
67AQI
18AQI
24AQI
23AQI
22AQI
17AQI
24AQI
17AQI
20AQI
16AQI
19AQI
22AQI
30AQI
30AQI
15AQI
15AQI
17AQI
18AQI
22AQI
19AQI
18AQI
18AQI
24AQI
18AQI
16AQI
35AQI
47AQI
48AQI
53AQI
51AQI
33AQI
15AQI
15AQI
29AQI
47AQI
21AQI
18AQI
17AQI
21AQI
28AQI
22AQI
17AQI
15AQI
24AQI
33AQI
18AQI
15AQI
18AQI
17AQI
13AQI
18AQI
17AQI
24AQI
18AQI
15AQI
23AQI
26AQI
17AQI
30AQI
29AQI
34AQI
35AQI
28AQI
17AQI
15AQI
13AQI
15AQI
16AQI
13AQI
12AQI
17AQI
24AQI
26AQI
26AQI
23AQI
24AQI
35AQI
28AQI
29AQI
37AQI
68AQI
78AQI
81AQI
72AQI
69AQI
68AQI
61AQI
56AQI
77AQI
77AQI
37AQI
35AQI
30AQI
47AQI
46AQI
37AQI
31AQI
30AQI
35AQI
38AQI
50AQI
29AQI
32AQI
42AQI
27AQI
19AQI
24AQI
26AQI
31AQI
47AQI
45AQI
50AQI
53AQI
40AQI
42AQI
46AQI
41AQI
39AQI
36AQI
37AQI
92AQI
90AQI
71AQI
59AQI
26AQI
20AQI
27AQI
29AQI
51AQI
47AQI
57AQI
37AQI
44AQI
67AQI
44AQI
39AQI
42AQI
67AQI
144AQI
118AQI
130AQI
123AQI
115AQI
90AQI
85AQI
67AQI
56AQI
54AQI
31AQI
42AQI
44AQI
58AQI
67AQI
64AQI
46AQI
23AQI
17AQI
18AQI
16AQI
17AQI
27AQI
27AQI
18AQI
17AQI
25AQI
31AQI
27AQI
18AQI
27AQI
40AQI
41AQI
37AQI
34AQI
24AQI
29AQI
18AQI
20AQI
24AQI
28AQI
40AQI
36AQI
43AQI
52AQI
55AQI
52AQI
55AQI
52AQI
42AQI
25AQI
23AQI
32AQI
35AQI
25AQI
22AQI
24AQI
25AQI
34AQI
22AQI
29AQI
29AQI
34AQI
43AQI
61AQI
66AQI
63AQI
44AQI
27AQI
28AQI
41AQI
37AQI
37AQI
40AQI
50AQI
35AQI
27AQI
42AQI
26AQI
32AQI
27AQI
26AQI
21AQI
46AQI
50AQI
50AQI
34AQI
42AQI
No. of days
202535AQI
Highest AQI recorded in
July50AQI
Lowest AQI recorded in
May21AQI
202430AQI
Highest AQI recorded in
July36AQI
Lowest AQI recorded in
November23AQI
202340AQI
Highest AQI recorded in
June82AQI
Lowest AQI recorded in
October24AQI
202234AQI
Highest AQI recorded in
October37AQI
Lowest AQI recorded in
August28AQI
202137AQI
Highest AQI recorded in
August47AQI
Lowest AQI recorded in
September28AQI
202033AQI
Highest AQI recorded in
March37AQI
Lowest AQI recorded in
October26AQI
Most & Least Polluted Years Over the Last 6 Years
Green Bay's annual 2025 AQI (35) shows an average percentage change of 2.1% (worsened AQI) compared to previous years: 2020 (33), 2021 (37), 2022 (34), 2023 (40), 2024 (30).