Worcester, Massachusetts, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
June Air Quality Analysis
Worcester, Massachusetts, United States
AQI Trends: Highest and Lowest
Same Day Analysis (3rd June):
On this day, AQI across the 5 years varied significantly: 2026 ranks the most lowest AQI at 15 of Good air quality, showing improvement over 2025, 2024, 2023 and 2022 on the same day.
Download 2024 Annual Data
World Air Quality Report

Day & Night AQI Trend: 3rd Jun - 4th Jun 2026
Worcester, Massachusetts, United States
5 AM3rd Jun 2026
8 PM
4 AM4th Jun 2026
23AQI
10AQI
22AQI
11AQI
In the last 24 hours,
Worcester's AQI reached its highest point of 23 at 3 PM during the Day, while the lowest point, 10, was recorded at 8 PM during the Day between 3rd Jun and 4th Jun 2026.
Day & Night AQI Trend : May - Jun 2026
Worcester, Massachusetts, United States
18°C13/26°C
13°C9/18°C
10°C4/16°C
9°C3/16°C
14°C9/21°C
12°C8/17°C
11°C4/19°C
12°C7/21°C
12°C10/15°C
11°C8/13°C
16°C7/26°C
24°C17/32°C
23°C15/32°C
26°C19/37°C
23°C14/31°C
17°C8/23°C
14°C7/22°C
14°C9/21°C
10°C9/11°C
15°C11/21°C
20°C13/28°C
23°C15/31°C
18°C13/23°C
16°C11/21°C
9°C6/11°C
12°C5/21°C
12°C8/17°C
16°C8/25°C
21°C11/30°C
23°C14/33°C
37AQI
24AQI
33AQI
25AQI
2026 Days Vs Air Quality
Worcester, Massachusetts, United States
96%
145
4%
6
Total number of days with different AQI categories in last 155 days in 2026 (210 days remaining)
Under WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2026, 96% of 155 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
Worcester, Massachusetts, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
25AQI (US)
29AQI (US)
40AQI (US)
24AQI (US)
34AQI (US)
47AQI (US)
34AQI (US)
18AQI (US)
32AQI (US)
16AQI (US)
14AQI (US)
12AQI (US)
27AQI (US)
34AQI (US)
45AQI (US)
10AQI (US)
31AQI (US)
54AQI (US)
25AQI (US)
41AQI (US)
37AQI (US)
44AQI (US)
56AQI (US)
34AQI (US)
47AQI (US)
47AQI (US)
35AQI (US)
28AQI (US)
35AQI (US)
54AQI (US)
43AQI (US)
36AQI (US)
51AQI (US)
47AQI (US)
37AQI (US)
50AQI (US)
40AQI (US)
27AQI (US)
36AQI (US)
46AQI (US)
39AQI (US)
27AQI (US)
34AQI (US)
40AQI (US)
36AQI (US)
26AQI (US)
34AQI (US)
35AQI (US)
40AQI (US)
36AQI (US)
27AQI (US)
29AQI (US)
28AQI (US)
37AQI (US)
44AQI (US)
36AQI (US)
26AQI (US)
33AQI (US)
25AQI (US)
29AQI (US)
50AQI (US)
30AQI (US)
40AQI (US)
29AQI (US)
29AQI (US)
38AQI (US)
29AQI (US)
31AQI (US)
34AQI (US)
41AQI (US)
27AQI (US)
36AQI (US)
25AQI (US)
26AQI (US)
32AQI (US)
32AQI (US)
28AQI (US)
29AQI (US)
31AQI (US)
36AQI (US)
30AQI (US)
40AQI (US)
31AQI (US)
27AQI (US)
19AQI (US)
27AQI (US)
29AQI (US)
23AQI (US)
20AQI (US)
22AQI (US)
27AQI (US)
29AQI (US)
24AQI (US)
25AQI (US)
29AQI (US)
29AQI (US)
26AQI (US)
33AQI (US)
19AQI (US)
25AQI (US)
25AQI (US)
22AQI (US)
20AQI (US)
21AQI (US)
25AQI (US)
23AQI (US)
28AQI (US)
32AQI (US)
28AQI (US)
25AQI (US)
18AQI (US)
22AQI (US)
27AQI (US)
32AQI (US)
18AQI (US)
22AQI (US)
21AQI (US)
24AQI (US)
25AQI (US)
20AQI (US)
21AQI (US)
34AQI (US)
34AQI (US)
20AQI (US)
23AQI (US)
27AQI (US)
25AQI (US)
25AQI (US)
27AQI (US)
21AQI (US)
17AQI (US)
44AQI (US)
49AQI (US)
49AQI (US)
55AQI (US)
53AQI (US)
45AQI (US)
40AQI (US)
35AQI (US)
37AQI (US)
42AQI (US)
41AQI (US)
19AQI (US)
15AQI (US)
15AQI (US)
20AQI (US)
17AQI (US)
23AQI (US)
18AQI (US)
15AQI (US)
15AQI (US)
34AQI (US)
36AQI (US)
31AQI (US)
25AQI (US)
31AQI (US)
16AQI (US)
No. of days
202631AQI (US)
Highest AQI (US) recorded in
February36AQI (US)
Lowest AQI (US) recorded in
June16AQI (US)
202530AQI (US)
Highest AQI (US) recorded in
June44AQI (US)
Lowest AQI (US) recorded in
April20AQI (US)
202430AQI (US)
Highest AQI (US) recorded in
August37AQI (US)
Lowest AQI (US) recorded in
November25AQI (US)
202334AQI (US)
Highest AQI (US) recorded in
June45AQI (US)
Lowest AQI (US) recorded in
October29AQI (US)
202237AQI (US)
Highest AQI (US) recorded in
July47AQI (US)
Lowest AQI (US) recorded in
September26AQI (US)
202139AQI (US)
Highest AQI (US) recorded in
June46AQI (US)
Lowest AQI (US) recorded in
October29AQI (US)
202034AQI (US)
Highest AQI (US) recorded in
August37AQI (US)
Lowest AQI (US) recorded in
May31AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Worcester's annual 2026 AQI (US) (31) shows an average percentage change of -7.9% (improved AQI (US)) compared to previous years: 2020 (34), 2021 (39), 2022 (37), 2023 (34), 2024 (30), 2025 (30).