Weymouth, Massachusetts, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
August Air Quality Analysis
Weymouth, Massachusetts, United States
AQI Trends: Highest and Lowest
Same Day Analysis (5th August ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 85 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 5th Aug - 6th Aug 2025
Weymouth, Massachusetts, United States
5 AM5th Aug 2025
8 PM
4 AM6th Aug 2025
118AQI
54AQI
64AQI
40AQI
In the last 24 hours,
Weymouth's AQI reached its highest point of 118 at 9 AM during the Day, while the lowest point, 40, was recorded at 3 AM during the Night between 5th Aug and 6th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Weymouth, Massachusetts, United States
25°C21/31°C
25°C19/32°C
20°C19/21°C
19°C18/21°C
20°C17/24°C
21°C19/24°C
21°C18/24°C
21°C19/25°C
25°C21/31°C
25°C21/31°C
24°C22/27°C
23°C20/27°C
22°C17/28°C
23°C20/28°C
22°C19/25°C
20°C16/23°C
21°C18/24°C
24°C19/30°C
26°C21/33°C
22°C20/24°C
21°C18/23°C
22°C19/26°C
28°C22/35°C
24°C22/26°C
21°C18/23°C
18°C16/20°C
19°C15/23°C
21°C16/27°C
22°C17/27°C
20°C18/20°C
--°C/°C
42AQI
39AQI
40AQI
37AQI
2025 Days Vs Air Quality
Weymouth, Massachusetts, United States
83%
109
17%
23
Total number of days with different AQI categories in last 218 days in 2025 (147 days remaining)
Under WHO’s Safe Air Quality Limits: 83%
Health Risk Level:
Low
In 2025, 83% of 218 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
Weymouth, Massachusetts, United States
AQI levels in 2025
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
18AQI
19AQI
22AQI
23AQI
31AQI
17AQI
17AQI
24AQI
24AQI
21AQI
21AQI
15AQI
18AQI
14AQI
19AQI
20AQI
18AQI
15AQI
17AQI
28AQI
12AQI
13AQI
21AQI
48AQI
21AQI
16AQI
39AQI
24AQI
22AQI
49AQI
29AQI
11AQI
17AQI
25AQI
22AQI
17AQI
38AQI
46AQI
38AQI
28AQI
29AQI
26AQI
24AQI
31AQI
15AQI
20AQI
20AQI
27AQI
29AQI
32AQI
31AQI
34AQI
18AQI
12AQI
12AQI
16AQI
24AQI
13AQI
12AQI
13AQI
18AQI
24AQI
25AQI
18AQI
30AQI
19AQI
13AQI
17AQI
23AQI
35AQI
54AQI
60AQI
49AQI
84AQI
79AQI
51AQI
50AQI
69AQI
54AQI
45AQI
31AQI
31AQI
28AQI
22AQI
25AQI
32AQI
51AQI
52AQI
49AQI
55AQI
52AQI
38AQI
24AQI
25AQI
39AQI
38AQI
37AQI
31AQI
44AQI
42AQI
54AQI
58AQI
42AQI
39AQI
32AQI
28AQI
28AQI
28AQI
21AQI
23AQI
25AQI
34AQI
35AQI
19AQI
23AQI
19AQI
30AQI
18AQI
21AQI
25AQI
35AQI
74AQI
79AQI
69AQI
59AQI
54AQI
66AQI
56AQI
31AQI
51AQI
69AQI
85AQI
23AQI
22AQI
24AQI
43AQI
38AQI
58AQI
No. of days
202532AQI
Highest AQI recorded in
August58AQI
Lowest AQI recorded in
April22AQI
Most & Least Polluted Years Over the Last 1 Years
Weymouth's annual 2025 AQI (32) shows an average percentage change of NaN% (improved AQI) compared to previous years: .