Truro, Massachusetts, 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
Truro, Massachusetts, United States
AQI Trends: Highest and Lowest
Same Day Analysis (19th October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 44 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
Truro, Massachusetts, United States
6 AM18th Oct 2025
6 PM
5 AM19th Oct 2025
51AQI
26AQI
54AQI
26AQI
In the last 24 hours,
Truro's AQI reached its highest point of 54 at 5 AM during the Night, while the lowest point, 26, was recorded at 8 PM during the Night between 18th Oct and 19th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Truro, Massachusetts, United States
--°C/°C
16°C15/16°C
15°C9/19°C
16°C13/21°C
19°C15/25°C
18°C17/20°C
20°C18/21°C
22°C20/26°C
20°C18/23°C
20°C18/24°C
21°C17/24°C
19°C16/24°C
15°C13/16°C
13°C11/16°C
15°C9/20°C
18°C14/24°C
19°C13/26°C
20°C17/25°C
20°C17/24°C
18°C12/22°C
11°C9/12°C
11°C8/14°C
14°C11/17°C
15°C13/16°C
15°C14/15°C
15°C13/15°C
13°C9/16°C
9°C9/10°C
11°C9/13°C
11°C9/14°C
13°C8/16°C
29AQI
25AQI
30AQI
26AQI
2025 Days Vs Air Quality
Truro, Massachusetts, United States
86%
179
14%
28
Total number of days with different AQI categories in last 293 days in 2025 (72 days remaining)
Under WHO’s Safe Air Quality Limits: 86%
Health Risk Level:
Low
In 2025, 86% of 293 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
Truro, Massachusetts, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
17AQI
20AQI
25AQI
24AQI
27AQI
17AQI
18AQI
25AQI
25AQI
19AQI
16AQI
15AQI
15AQI
14AQI
20AQI
21AQI
19AQI
24AQI
15AQI
27AQI
18AQI
17AQI
18AQI
40AQI
22AQI
15AQI
35AQI
21AQI
22AQI
41AQI
28AQI
11AQI
17AQI
25AQI
23AQI
17AQI
37AQI
49AQI
33AQI
24AQI
22AQI
25AQI
23AQI
27AQI
13AQI
20AQI
20AQI
24AQI
27AQI
28AQI
28AQI
32AQI
18AQI
13AQI
12AQI
15AQI
17AQI
12AQI
13AQI
13AQI
18AQI
22AQI
23AQI
19AQI
28AQI
19AQI
14AQI
17AQI
22AQI
34AQI
53AQI
57AQI
48AQI
67AQI
71AQI
43AQI
45AQI
65AQI
58AQI
49AQI
32AQI
31AQI
26AQI
21AQI
25AQI
33AQI
49AQI
51AQI
49AQI
55AQI
51AQI
36AQI
25AQI
25AQI
35AQI
34AQI
35AQI
31AQI
42AQI
42AQI
52AQI
55AQI
44AQI
36AQI
29AQI
29AQI
28AQI
27AQI
19AQI
22AQI
25AQI
32AQI
36AQI
19AQI
23AQI
19AQI
30AQI
22AQI
24AQI
26AQI
34AQI
72AQI
71AQI
68AQI
57AQI
52AQI
64AQI
55AQI
33AQI
55AQI
72AQI
79AQI
55AQI
60AQI
35AQI
33AQI
35AQI
50AQI
59AQI
52AQI
36AQI
50AQI
44AQI
54AQI
22AQI
18AQI
18AQI
19AQI
25AQI
37AQI
29AQI
29AQI
20AQI
19AQI
21AQI
25AQI
19AQI
21AQI
31AQI
30AQI
29AQI
25AQI
31AQI
45AQI
37AQI
23AQI
23AQI
22AQI
26AQI
31AQI
33AQI
37AQI
44AQI
29AQI
23AQI
20AQI
27AQI
20AQI
27AQI
20AQI
24AQI
28AQI
18AQI
22AQI
20AQI
26AQI
20AQI
16AQI
26AQI
17AQI
21AQI
35AQI
54AQI
57AQI
31AQI
25AQI
23AQI
21AQI
27AQI
33AQI
38AQI
27AQI
23AQI
26AQI
25AQI
40AQI
44AQI
23AQI
21AQI
22AQI
41AQI
38AQI
38AQI
27AQI
31AQI
No. of days
202531AQI
Highest AQI recorded in
June41AQI
Lowest AQI recorded in
April21AQI
Most & Least Polluted Years Over the Last 1 Years
Truro's annual 2025 AQI (31) shows an average percentage change of NaN% (improved AQI) compared to previous years: .