2nd Avenue, Altoona, Pennsylvania, 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
2nd Avenue, Altoona, Pennsylvania, United States
AQI Trends: Highest and Lowest
Same Day Analysis (18th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 34 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
2nd Avenue, Altoona, Pennsylvania, United States
7 AM18th Oct 2025
6 PM
6 AM19th Oct 2025
50AQI
21AQI
54AQI
29AQI
In the last 24 hours,
2nd Avenue's AQI reached its highest point of 54 at 1 AM during the Night, while the lowest point, 21, was recorded at 6 PM during the Day between 18th Oct and 19th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
2nd Avenue, Altoona, Pennsylvania, United States
20°C12/28°C
16°C13/18°C
20°C15/25°C
21°C16/28°C
20°C17/25°C
20°C17/24°C
20°C18/22°C
20°C16/27°C
19°C14/24°C
21°C14/30°C
19°C14/25°C
20°C14/28°C
17°C11/24°C
15°C7/25°C
16°C8/27°C
19°C11/29°C
19°C10/30°C
20°C10/30°C
19°C15/26°C
15°C8/18°C
10°C4/16°C
9°C2/18°C
12°C4/21°C
14°C11/21°C
13°C11/15°C
14°C10/18°C
14°C9/21°C
10°C5/18°C
11°C4/20°C
16°C10/26°C
--°C/°C
35AQI
25AQI
30AQI
25AQI
2025 Days Vs Air Quality
2nd Avenue, Altoona, Pennsylvania, United States
84%
174
16%
32
Total number of days with different AQI categories in last 292 days in 2025 (73 days remaining)
Under WHO’s Safe Air Quality Limits: 84%
Health Risk Level:
Low
In 2025, 84% of 292 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
2nd Avenue, Altoona, Pennsylvania, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
22AQI
37AQI
55AQI
50AQI
21AQI
17AQI
26AQI
23AQI
22AQI
31AQI
21AQI
21AQI
13AQI
20AQI
25AQI
35AQI
19AQI
21AQI
32AQI
23AQI
14AQI
22AQI
34AQI
55AQI
21AQI
31AQI
21AQI
25AQI
33AQI
51AQI
21AQI
13AQI
18AQI
31AQI
20AQI
25AQI
25AQI
23AQI
20AQI
26AQI
18AQI
18AQI
26AQI
18AQI
21AQI
34AQI
28AQI
19AQI
17AQI
24AQI
39AQI
29AQI
16AQI
19AQI
24AQI
20AQI
11AQI
15AQI
15AQI
20AQI
25AQI
26AQI
13AQI
24AQI
32AQI
34AQI
22AQI
25AQI
39AQI
58AQI
67AQI
54AQI
51AQI
61AQI
50AQI
50AQI
60AQI
68AQI
70AQI
68AQI
44AQI
24AQI
21AQI
24AQI
29AQI
34AQI
43AQI
47AQI
56AQI
57AQI
58AQI
45AQI
33AQI
29AQI
41AQI
48AQI
35AQI
42AQI
49AQI
58AQI
59AQI
62AQI
55AQI
40AQI
46AQI
54AQI
55AQI
53AQI
41AQI
38AQI
50AQI
49AQI
32AQI
30AQI
42AQI
40AQI
43AQI
42AQI
45AQI
49AQI
46AQI
41AQI
39AQI
39AQI
43AQI
44AQI
51AQI
54AQI
29AQI
49AQI
61AQI
70AQI
77AQI
68AQI
72AQI
57AQI
49AQI
45AQI
40AQI
31AQI
39AQI
56AQI
56AQI
50AQI
23AQI
24AQI
18AQI
17AQI
21AQI
28AQI
32AQI
20AQI
17AQI
20AQI
25AQI
22AQI
22AQI
26AQI
24AQI
23AQI
28AQI
27AQI
42AQI
48AQI
30AQI
20AQI
19AQI
22AQI
25AQI
30AQI
42AQI
41AQI
40AQI
42AQI
33AQI
29AQI
37AQI
24AQI
30AQI
33AQI
28AQI
37AQI
22AQI
24AQI
30AQI
32AQI
37AQI
24AQI
22AQI
20AQI
32AQI
41AQI
47AQI
39AQI
30AQI
16AQI
22AQI
22AQI
30AQI
30AQI
25AQI
24AQI
26AQI
22AQI
27AQI
34AQI
37AQI
25AQI
23AQI
46AQI
46AQI
39AQI
31AQI
28AQI
No. of days
202534AQI
Highest AQI recorded in
June46AQI
Lowest AQI recorded in
May23AQI
Most & Least Polluted Years Over the Last 1 Years
2nd Avenue's annual 2025 AQI (34) shows an average percentage change of NaN% (improved AQI) compared to previous years: .