Underhill, Vermont, 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
Underhill, Vermont, United States
AQI Trends: Highest and Lowest
Same Day Analysis (16th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 21 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
Underhill, Vermont, United States
6 AM16th Oct 2025
6 PM
5 AM17th Oct 2025
27AQI
8AQI
38AQI
15AQI
In the last 24 hours,
Underhill's AQI reached its highest point of 38 at 1 AM during the Night, while the lowest point, 8, was recorded at 10 AM during the Day between 16th Oct and 17th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Underhill, Vermont, United States
18°C11/24°C
19°C11/28°C
14°C10/18°C
10°C3/18°C
14°C3/25°C
19°C11/27°C
18°C16/20°C
19°C15/22°C
17°C16/21°C
19°C15/24°C
18°C12/25°C
21°C16/28°C
18°C10/28°C
16°C10/23°C
10°C4/18°C
10°C2/19°C
14°C7/24°C
18°C10/28°C
21°C13/31°C
22°C15/30°C
21°C17/29°C
13°C7/16°C
7°C3/13°C
7°C0/16°C
12°C6/21°C
12°C4/21°C
13°C10/16°C
12°C9/16°C
9°C6/13°C
7°C3/13°C
--°C/°C
26AQI
22AQI
26AQI
22AQI
2025 Days Vs Air Quality
Underhill, Vermont, United States
87%
178
12%
24
0.9%
2
Total number of days with different AQI categories in last 290 days in 2025 (75 days remaining)
Under WHO’s Safe Air Quality Limits: 87%
Health Risk Level:
Low
In 2025, 87% 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
Underhill, Vermont, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
16AQI
18AQI
20AQI
20AQI
22AQI
16AQI
17AQI
16AQI
16AQI
13AQI
13AQI
16AQI
14AQI
14AQI
18AQI
17AQI
15AQI
16AQI
17AQI
16AQI
11AQI
12AQI
18AQI
36AQI
12AQI
14AQI
20AQI
13AQI
16AQI
22AQI
18AQI
10AQI
17AQI
22AQI
14AQI
17AQI
22AQI
18AQI
19AQI
16AQI
14AQI
18AQI
21AQI
16AQI
14AQI
17AQI
18AQI
23AQI
27AQI
23AQI
25AQI
24AQI
16AQI
12AQI
15AQI
16AQI
13AQI
11AQI
11AQI
16AQI
18AQI
19AQI
21AQI
18AQI
19AQI
21AQI
12AQI
15AQI
22AQI
51AQI
57AQI
50AQI
85AQI
79AQI
70AQI
27AQI
53AQI
65AQI
33AQI
28AQI
37AQI
32AQI
28AQI
19AQI
24AQI
22AQI
26AQI
29AQI
39AQI
50AQI
35AQI
30AQI
24AQI
24AQI
22AQI
24AQI
32AQI
31AQI
51AQI
33AQI
27AQI
42AQI
45AQI
22AQI
32AQI
29AQI
32AQI
39AQI
37AQI
35AQI
60AQI
67AQI
36AQI
16AQI
27AQI
24AQI
32AQI
17AQI
18AQI
36AQI
47AQI
128AQI
89AQI
53AQI
50AQI
55AQI
65AQI
26AQI
42AQI
87AQI
115AQI
88AQI
63AQI
80AQI
75AQI
65AQI
59AQI
55AQI
54AQI
47AQI
46AQI
30AQI
38AQI
42AQI
16AQI
16AQI
17AQI
18AQI
24AQI
27AQI
27AQI
20AQI
14AQI
17AQI
19AQI
18AQI
17AQI
20AQI
23AQI
24AQI
25AQI
29AQI
27AQI
32AQI
25AQI
17AQI
17AQI
19AQI
24AQI
26AQI
27AQI
37AQI
31AQI
26AQI
24AQI
22AQI
19AQI
16AQI
15AQI
19AQI
25AQI
25AQI
22AQI
19AQI
20AQI
37AQI
35AQI
24AQI
13AQI
20AQI
28AQI
38AQI
51AQI
49AQI
38AQI
15AQI
14AQI
17AQI
23AQI
27AQI
16AQI
20AQI
17AQI
21AQI
19AQI
16AQI
18AQI
37AQI
42AQI
41AQI
24AQI
25AQI
No. of days
202529AQI
Highest AQI recorded in
July42AQI
Lowest AQI recorded in
April16AQI
Most & Least Polluted Years Over the Last 1 Years
Underhill's annual 2025 AQI (29) shows an average percentage change of NaN% (improved AQI) compared to previous years: .