U.S. 31, Decatur, Alabama, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
November Air Quality Analysis
U.S. 31, Decatur, Alabama, United States
AQI Trends: Highest and Lowest
Same Day Analysis (3rd November ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 26 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Nov - 4th Nov 2025
U.S. 31, Decatur, Alabama, United States
6 AM3rd Nov 2025
6 PM
5 AM4th Nov 2025
27AQI
12AQI
56AQI
11AQI
In the last 24 hours,
U.S. 31's AQI reached its highest point of 56 at 7 PM during the Night, while the lowest point, 11, was recorded at 11 PM during the Night between 3rd Nov and 4th Nov 2025.
Day & Night AQI Trend : Oct - Nov 2025
U.S. 31, Decatur, Alabama, United States
--°C/°C
24°C21/31°C
24°C21/30°C
21°C17/25°C
18°C12/25°C
20°C14/27°C
18°C10/28°C
18°C9/29°C
18°C8/29°C
19°C11/30°C
20°C10/31°C
21°C13/31°C
21°C12/32°C
23°C17/31°C
18°C11/21°C
13°C6/24°C
15°C10/24°C
14°C5/25°C
15°C5/27°C
14°C6/24°C
17°C8/26°C
17°C13/21°C
12°C10/14°C
13°C12/15°C
11°C9/15°C
10°C6/13°C
9°C5/13°C
10°C2/19°C
9°C5/12°C
8°C3/15°C
12°C4/22°C
40AQI
31AQI
34AQI
28AQI
2025 Days Vs Air Quality
U.S. 31, Decatur, Alabama, United States
86%
190
14%
32
Total number of days with different AQI categories in last 309 days in 2025 (56 days remaining)
Under WHO’s Safe Air Quality Limits: 86%
Health Risk Level:
Low
In 2025, 86% of 309 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
U.S. 31, Decatur, Alabama, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
44AQI
64AQI
60AQI
51AQI
25AQI
23AQI
35AQI
37AQI
39AQI
34AQI
19AQI
16AQI
23AQI
24AQI
38AQI
29AQI
30AQI
30AQI
45AQI
33AQI
28AQI
50AQI
54AQI
53AQI
50AQI
47AQI
25AQI
32AQI
35AQI
42AQI
27AQI
32AQI
40AQI
50AQI
51AQI
39AQI
31AQI
22AQI
19AQI
22AQI
31AQI
38AQI
39AQI
29AQI
28AQI
20AQI
21AQI
25AQI
37AQI
43AQI
47AQI
39AQI
36AQI
37AQI
42AQI
26AQI
24AQI
24AQI
30AQI
29AQI
24AQI
19AQI
24AQI
25AQI
25AQI
38AQI
50AQI
50AQI
61AQI
64AQI
45AQI
48AQI
48AQI
31AQI
38AQI
34AQI
56AQI
55AQI
39AQI
31AQI
30AQI
32AQI
26AQI
32AQI
25AQI
31AQI
41AQI
44AQI
44AQI
54AQI
59AQI
49AQI
44AQI
36AQI
35AQI
34AQI
29AQI
34AQI
45AQI
54AQI
68AQI
58AQI
55AQI
51AQI
39AQI
31AQI
35AQI
42AQI
44AQI
28AQI
33AQI
39AQI
37AQI
24AQI
31AQI
39AQI
40AQI
46AQI
39AQI
47AQI
36AQI
26AQI
22AQI
33AQI
36AQI
48AQI
45AQI
43AQI
47AQI
32AQI
32AQI
26AQI
24AQI
29AQI
33AQI
43AQI
46AQI
26AQI
22AQI
21AQI
30AQI
48AQI
52AQI
53AQI
47AQI
49AQI
46AQI
34AQI
36AQI
36AQI
27AQI
26AQI
23AQI
28AQI
32AQI
31AQI
35AQI
33AQI
39AQI
42AQI
42AQI
39AQI
57AQI
40AQI
33AQI
28AQI
35AQI
45AQI
54AQI
54AQI
46AQI
49AQI
52AQI
54AQI
56AQI
55AQI
58AQI
58AQI
58AQI
56AQI
54AQI
46AQI
26AQI
22AQI
21AQI
26AQI
29AQI
34AQI
44AQI
43AQI
48AQI
41AQI
36AQI
17AQI
39AQI
32AQI
21AQI
39AQI
42AQI
46AQI
50AQI
38AQI
36AQI
36AQI
48AQI
60AQI
29AQI
24AQI
43AQI
22AQI
28AQI
24AQI
33AQI
39AQI
20AQI
19AQI
17AQI
16AQI
26AQI
38AQI
23AQI
26AQI
49AQI
36AQI
30AQI
42AQI
40AQI
35AQI
44AQI
34AQI
29AQI
No. of days
202537AQI
Highest AQI recorded in
March49AQI
Lowest AQI recorded in
November29AQI
Most & Least Polluted Years Over the Last 1 Years
U.S. 31's annual 2025 AQI (37) shows an average percentage change of NaN% (improved AQI) compared to previous years: .