Hartford, Connecticut, 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
Hartford, Connecticut, United States
AQI Trends: Highest and Lowest
Same Day Analysis (13th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 2nd highest AQI at 34 of Good air quality, showing improvement over 2025 on the same day.
Day & Night AQI Trend: 12th Aug - 13th Aug 2026
Hartford, Connecticut, United States
5 AM12th Aug 2026
8 PM
4 AM13th Aug 2026
48AQI
21AQI
33AQI
21AQI
In the last 24 hours,
Hartford's AQI reached its highest point of 48 at 5 AM during the Day, while the lowest point, 21, was recorded at 3 AM during the Night between 12th Aug and 13th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Hartford, Connecticut, United States
28°C22/34°C
26°C19/35°C
25°C17/33°C
22°C17/32°C
24°C19/30°C
22°C15/31°C
22°C16/29°C
24°C19/31°C
21°C16/29°C
21°C14/31°C
22°C15/31°C
22°C14/31°C
23°C15/30°C
24°C20/29°C
22°C20/25°C
21°C19/27°C
23°C17/29°C
24°C19/32°C
26°C22/31°C
24°C20/27°C
23°C17/31°C
24°C16/31°C
27°C23/32°C
29°C24/36°C
27°C22/34°C
27°C22/34°C
25°C17/34°C
26°C21/33°C
25°C19/33°C
24°C20/31°C
43AQI
36AQI
40AQI
36AQI
2026 Days Vs Air Quality
Hartford, Connecticut, United States
95%
212
4%
9
0.4%
1
Total number of days with different AQI categories in last 225 days in 2026 (140 days remaining)
Under WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2026, 95% of 225 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
Hartford, Connecticut, United States
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
26AQI (US)
27AQI (US)
35AQI (US)
26AQI (US)
20AQI (US)
56AQI (US)
45AQI (US)
23AQI (US)
42AQI (US)
25AQI (US)
15AQI (US)
11AQI (US)
36AQI (US)
42AQI (US)
43AQI (US)
11AQI (US)
42AQI (US)
72AQI (US)
38AQI (US)
32AQI (US)
34AQI (US)
46AQI (US)
42AQI (US)
31AQI (US)
34AQI (US)
37AQI (US)
34AQI (US)
31AQI (US)
34AQI (US)
44AQI (US)
29AQI (US)
27AQI (US)
28AQI (US)
37AQI (US)
28AQI (US)
34AQI (US)
38AQI (US)
32AQI (US)
21AQI (US)
28AQI (US)
39AQI (US)
45AQI (US)
26AQI (US)
31AQI (US)
41AQI (US)
45AQI (US)
31AQI (US)
62AQI (US)
60AQI (US)
28AQI (US)
35AQI (US)
45AQI (US)
34AQI (US)
35AQI (US)
35AQI (US)
41AQI (US)
28AQI (US)
22AQI (US)
28AQI (US)
28AQI (US)
40AQI (US)
25AQI (US)
28AQI (US)
27AQI (US)
31AQI (US)
19AQI (US)
20AQI (US)
21AQI (US)
26AQI (US)
30AQI (US)
32AQI (US)
26AQI (US)
18AQI (US)
21AQI (US)
26AQI (US)
32AQI (US)
24AQI (US)
20AQI (US)
26AQI (US)
28AQI (US)
17AQI (US)
36AQI (US)
34AQI (US)
22AQI (US)
20AQI (US)
28AQI (US)
17AQI (US)
13AQI (US)
19AQI (US)
26AQI (US)
28AQI (US)
32AQI (US)
22AQI (US)
24AQI (US)
27AQI (US)
29AQI (US)
21AQI (US)
32AQI (US)
19AQI (US)
21AQI (US)
25AQI (US)
24AQI (US)
23AQI (US)
26AQI (US)
22AQI (US)
20AQI (US)
27AQI (US)
32AQI (US)
24AQI (US)
19AQI (US)
18AQI (US)
17AQI (US)
12AQI (US)
31AQI (US)
16AQI (US)
14AQI (US)
17AQI (US)
19AQI (US)
22AQI (US)
18AQI (US)
20AQI (US)
22AQI (US)
29AQI (US)
22AQI (US)
25AQI (US)
20AQI (US)
20AQI (US)
25AQI (US)
31AQI (US)
19AQI (US)
16AQI (US)
43AQI (US)
41AQI (US)
50AQI (US)
56AQI (US)
55AQI (US)
46AQI (US)
37AQI (US)
36AQI (US)
42AQI (US)
42AQI (US)
41AQI (US)
19AQI (US)
16AQI (US)
12AQI (US)
14AQI (US)
12AQI (US)
12AQI (US)
19AQI (US)
13AQI (US)
16AQI (US)
16AQI (US)
25AQI (US)
27AQI (US)
14AQI (US)
11AQI (US)
14AQI (US)
17AQI (US)
23AQI (US)
18AQI (US)
13AQI (US)
15AQI (US)
14AQI (US)
15AQI (US)
13AQI (US)
17AQI (US)
11AQI (US)
14AQI (US)
10AQI (US)
12AQI (US)
16AQI (US)
12AQI (US)
14AQI (US)
15AQI (US)
19AQI (US)
15AQI (US)
21AQI (US)
28AQI (US)
20AQI (US)
35AQI (US)
27AQI (US)
18AQI (US)
32AQI (US)
28AQI (US)
12AQI (US)
17AQI (US)
17AQI (US)
13AQI (US)
22AQI (US)
16AQI (US)
21AQI (US)
22AQI (US)
54AQI (US)
66AQI (US)
75AQI (US)
114AQI (US)
48AQI (US)
30AQI (US)
40AQI (US)
31AQI (US)
19AQI (US)
26AQI (US)
31AQI (US)
34AQI (US)
37AQI (US)
43AQI (US)
30AQI (US)
24AQI (US)
26AQI (US)
39AQI (US)
34AQI (US)
34AQI (US)
21AQI (US)
28AQI (US)
41AQI (US)
31AQI (US)
27AQI (US)
40AQI (US)
27AQI (US)
38AQI (US)
34AQI (US)
34AQI (US)
34AQI (US)
35AQI (US)
25AQI (US)
23AQI (US)
29AQI (US)
16AQI (US)
33AQI (US)
33AQI (US)
No. of days
202628AQI (US)
Highest AQI (US) recorded in
February35AQI (US)
Lowest AQI (US) recorded in
June16AQI (US)
202532AQI (US)
Highest AQI (US) recorded in
June45AQI (US)
Lowest AQI (US) recorded in
October24AQI (US)
202427AQI (US)
Highest AQI (US) recorded in
August37AQI (US)
Lowest AQI (US) recorded in
March17AQI (US)
202333AQI (US)
Highest AQI (US) recorded in
June50AQI (US)
Lowest AQI (US) recorded in
January25AQI (US)
202230AQI (US)
Highest AQI (US) recorded in
January39AQI (US)
Lowest AQI (US) recorded in
April23AQI (US)
202131AQI (US)
Highest AQI (US) recorded in
July42AQI (US)
Lowest AQI (US) recorded in
May25AQI (US)
202031AQI (US)
Highest AQI (US) recorded in
November38AQI (US)
Lowest AQI (US) recorded in
March22AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Hartford's annual 2026 AQI (US) (28) shows an average percentage change of -8.3% (improved AQI (US)) compared to previous years: 2020 (31), 2021 (31), 2022 (30), 2023 (33), 2024 (27), 2025 (32).