Research Center for Environmental Monitoring and Modeling, Hanoi, Ha Noi, Vietnam Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
July Air Quality Analysis
Research Center for Environmental Monitoring and Modeling, Hanoi, Ha Noi, Vietnam
AQI Trends: Highest and Lowest
Same Day Analysis (12th July):
On this day, AQI across the 4 years varied significantly: 2026 ranks 1st highest AQI at 90 of Moderate air quality on the same day.
Day & Night AQI Trend: 12th Jul - 13th Jul 2026
Research Center for Environmental Monitoring and Modeling, Hanoi, Ha Noi, Vietnam
5 AM12th Jul 2026
6 PM
4 AM13th Jul 2026
115AQI
65AQI
86AQI
55AQI
In the last 24 hours,
Research Center for Environmental Monitoring and Modeling's AQI reached its highest point of 115 at 7 AM during the Day, while the lowest point, 55, was recorded at 8 PM during the Night between 12th Jul and 13th Jul 2026.
Day & Night AQI Trend : Jun - Jul 2026
Research Center for Environmental Monitoring and Modeling, Hanoi, Ha Noi, Vietnam
31°C28/38°C
31°C28/38°C
28°C27/29°C
28°C25/31°C
31°C28/37°C
30°C29/31°C
31°C27/37°C
32°C27/39°C
33°C29/40°C
34°C30/40°C
35°C30/41°C
32°C29/38°C
28°C27/32°C
30°C27/35°C
32°C28/37°C
31°C27/37°C
29°C27/34°C
29°C26/34°C
30°C27/33°C
30°C27/34°C
29°C27/33°C
29°C27/33°C
29°C26/34°C
30°C26/36°C
31°C27/35°C
29°C27/34°C
29°C26/35°C
30°C27/35°C
30°C27/34°C
31°C27/35°C
59AQI
52AQI
61AQI
54AQI
2026 Days Vs Air Quality
Research Center for Environmental Monitoring and Modeling, Hanoi, Ha Noi, Vietnam
12%
23
64%
121
16%
31
8%
15
Total number of days with different AQI categories in last 194 days in 2026 (171 days remaining)
Under WHO’s Safe Air Quality Limits: 12%
Health Risk Level:
Extreme
In 2026, 12% of 194 days were within WHO’s safe air quality limits. The risk of health issues is Extreme, potentially causing respiratory problems, heart disease, skin issues, and stress, especially for children, the elderly, and those with pre-existing conditions.
Annual Air Quality Insights
Research Center for Environmental Monitoring and Modeling, Hanoi, Ha Noi, Vietnam
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
128AQI (US)
72AQI (US)
117AQI (US)
154AQI (US)
113AQI (US)
71AQI (US)
122AQI (US)
141AQI (US)
186AQI (US)
169AQI (US)
172AQI (US)
161AQI (US)
184AQI (US)
169AQI (US)
166AQI (US)
151AQI (US)
127AQI (US)
125AQI (US)
135AQI (US)
110AQI (US)
96AQI (US)
61AQI (US)
72AQI (US)
91AQI (US)
138AQI (US)
156AQI (US)
158AQI (US)
150AQI (US)
136AQI (US)
93AQI (US)
87AQI (US)
81AQI (US)
116AQI (US)
154AQI (US)
161AQI (US)
153AQI (US)
154AQI (US)
83AQI (US)
90AQI (US)
38AQI (US)
91AQI (US)
89AQI (US)
91AQI (US)
89AQI (US)
77AQI (US)
97AQI (US)
78AQI (US)
127AQI (US)
112AQI (US)
102AQI (US)
75AQI (US)
97AQI (US)
54AQI (US)
66AQI (US)
78AQI (US)
85AQI (US)
90AQI (US)
93AQI (US)
78AQI (US)
82AQI (US)
74AQI (US)
57AQI (US)
62AQI (US)
96AQI (US)
131AQI (US)
103AQI (US)
71AQI (US)
62AQI (US)
26AQI (US)
71AQI (US)
121AQI (US)
113AQI (US)
78AQI (US)
75AQI (US)
62AQI (US)
61AQI (US)
66AQI (US)
66AQI (US)
56AQI (US)
76AQI (US)
73AQI (US)
65AQI (US)
68AQI (US)
67AQI (US)
84AQI (US)
68AQI (US)
81AQI (US)
87AQI (US)
106AQI (US)
93AQI (US)
69AQI (US)
94AQI (US)
122AQI (US)
90AQI (US)
105AQI (US)
146AQI (US)
142AQI (US)
104AQI (US)
105AQI (US)
105AQI (US)
132AQI (US)
137AQI (US)
117AQI (US)
98AQI (US)
82AQI (US)
67AQI (US)
95AQI (US)
77AQI (US)
87AQI (US)
74AQI (US)
51AQI (US)
67AQI (US)
88AQI (US)
77AQI (US)
63AQI (US)
56AQI (US)
35AQI (US)
34AQI (US)
65AQI (US)
74AQI (US)
55AQI (US)
36AQI (US)
67AQI (US)
71AQI (US)
58AQI (US)
60AQI (US)
92AQI (US)
89AQI (US)
61AQI (US)
52AQI (US)
63AQI (US)
72AQI (US)
77AQI (US)
74AQI (US)
69AQI (US)
54AQI (US)
62AQI (US)
73AQI (US)
71AQI (US)
55AQI (US)
64AQI (US)
59AQI (US)
49AQI (US)
78AQI (US)
42AQI (US)
71AQI (US)
70AQI (US)
76AQI (US)
92AQI (US)
67AQI (US)
72AQI (US)
84AQI (US)
56AQI (US)
66AQI (US)
39AQI (US)
49AQI (US)
34AQI (US)
54AQI (US)
87AQI (US)
81AQI (US)
50AQI (US)
57AQI (US)
66AQI (US)
87AQI (US)
64AQI (US)
59AQI (US)
46AQI (US)
42AQI (US)
53AQI (US)
45AQI (US)
48AQI (US)
47AQI (US)
50AQI (US)
34AQI (US)
78AQI (US)
70AQI (US)
62AQI (US)
34AQI (US)
55AQI (US)
66AQI (US)
68AQI (US)
34AQI (US)
48AQI (US)
43AQI (US)
77AQI (US)
56AQI (US)
60AQI (US)
32AQI (US)
84AQI (US)
90AQI (US)
129AQI (US)
96AQI (US)
77AQI (US)
90AQI (US)
65AQI (US)
59AQI (US)
59AQI (US)
No. of days
202685AQI (US)
Highest AQI (US) recorded in
January129AQI (US)
Lowest AQI (US) recorded in
July59AQI (US)
202590AQI (US)
Highest AQI (US) recorded in
December146AQI (US)
Lowest AQI (US) recorded in
August48AQI (US)
202468AQI (US)
Highest AQI (US) recorded in
January123AQI (US)
Lowest AQI (US) recorded in
September38AQI (US)
2023127AQI (US)
Highest AQI (US) recorded in
January188AQI (US)
Lowest AQI (US) recorded in
July87AQI (US)
2022178AQI (US)
Highest AQI (US) recorded in
October191AQI (US)
Lowest AQI (US) recorded in
November164AQI (US)
Most & Least Polluted Years Over the Last 5 Years
Research Center for Environmental Monitoring and Modeling's annual 2026 AQI (US) (85) shows an average percentage change of -16.4% (improved AQI (US)) compared to previous years: 2022 (178), 2023 (127), 2024 (68), 2025 (90).