Ichihara, Chiba, Japan 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
Ichihara, Chiba, Japan
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 17 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: 2nd Jun - 3rd Jun 2026
Ichihara, Chiba, Japan
4 AM2nd Jun 2026
6 PM
3 AM3rd Jun 2026
27AQI
17AQI
18AQI
13AQI
In the last 24 hours,
Ichihara's AQI reached its highest point of 27 at 11 AM during the Day, while the lowest point, 13, was recorded at 3 AM during the Night between 2nd Jun and 3rd Jun 2026.
Day & Night AQI Trend : May - Jun 2026
Ichihara, Chiba, Japan
17°C14/20°C
17°C15/20°C
19°C17/22°C
20°C18/23°C
19°C16/22°C
17°C16/19°C
18°C16/21°C
18°C15/21°C
19°C16/23°C
19°C16/23°C
18°C14/22°C
19°C15/23°C
21°C17/26°C
21°C17/24°C
22°C19/25°C
22°C19/24°C
20°C16/22°C
15°C14/16°C
16°C14/19°C
18°C16/21°C
21°C17/25°C
21°C18/25°C
22°C19/25°C
22°C20/23°C
21°C19/22°C
22°C19/25°C
23°C20/27°C
22°C19/26°C
21°C18/24°C
19°C18/23°C
44AQI
34AQI
42AQI
33AQI
2026 Days Vs Air Quality
Ichihara, Chiba, Japan
85%
131
15%
23
Total number of days with different AQI categories in last 154 days in 2026 (211 days remaining)
Under WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2026, 85% of 154 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
Ichihara, Chiba, Japan
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
19AQI (US)
23AQI (US)
19AQI (US)
29AQI (US)
39AQI (US)
17AQI (US)
29AQI (US)
37AQI (US)
16AQI (US)
34AQI (US)
30AQI (US)
21AQI (US)
36AQI (US)
17AQI (US)
32AQI (US)
48AQI (US)
51AQI (US)
26AQI (US)
36AQI (US)
37AQI (US)
13AQI (US)
23AQI (US)
37AQI (US)
36AQI (US)
44AQI (US)
26AQI (US)
44AQI (US)
28AQI (US)
18AQI (US)
35AQI (US)
37AQI (US)
39AQI (US)
36AQI (US)
16AQI (US)
39AQI (US)
63AQI (US)
56AQI (US)
13AQI (US)
12AQI (US)
34AQI (US)
35AQI (US)
44AQI (US)
33AQI (US)
42AQI (US)
60AQI (US)
50AQI (US)
50AQI (US)
17AQI (US)
39AQI (US)
13AQI (US)
24AQI (US)
51AQI (US)
42AQI (US)
29AQI (US)
38AQI (US)
28AQI (US)
25AQI (US)
43AQI (US)
40AQI (US)
35AQI (US)
61AQI (US)
40AQI (US)
49AQI (US)
49AQI (US)
47AQI (US)
42AQI (US)
34AQI (US)
43AQI (US)
57AQI (US)
54AQI (US)
61AQI (US)
38AQI (US)
44AQI (US)
57AQI (US)
49AQI (US)
46AQI (US)
48AQI (US)
37AQI (US)
34AQI (US)
41AQI (US)
50AQI (US)
36AQI (US)
34AQI (US)
59AQI (US)
27AQI (US)
29AQI (US)
52AQI (US)
55AQI (US)
47AQI (US)
18AQI (US)
27AQI (US)
16AQI (US)
42AQI (US)
44AQI (US)
36AQI (US)
30AQI (US)
26AQI (US)
21AQI (US)
27AQI (US)
46AQI (US)
45AQI (US)
31AQI (US)
36AQI (US)
39AQI (US)
34AQI (US)
32AQI (US)
34AQI (US)
30AQI (US)
32AQI (US)
33AQI (US)
37AQI (US)
45AQI (US)
38AQI (US)
32AQI (US)
45AQI (US)
51AQI (US)
49AQI (US)
42AQI (US)
40AQI (US)
26AQI (US)
37AQI (US)
42AQI (US)
51AQI (US)
29AQI (US)
22AQI (US)
28AQI (US)
28AQI (US)
24AQI (US)
22AQI (US)
29AQI (US)
27AQI (US)
31AQI (US)
39AQI (US)
35AQI (US)
34AQI (US)
86AQI (US)
69AQI (US)
53AQI (US)
49AQI (US)
62AQI (US)
58AQI (US)
60AQI (US)
53AQI (US)
58AQI (US)
46AQI (US)
39AQI (US)
24AQI (US)
25AQI (US)
24AQI (US)
21AQI (US)
26AQI (US)
31AQI (US)
20AQI (US)
17AQI (US)
30AQI (US)
36AQI (US)
44AQI (US)
36AQI (US)
40AQI (US)
23AQI (US)
No. of days
202637AQI (US)
Highest AQI (US) recorded in
March44AQI (US)
Lowest AQI (US) recorded in
June23AQI (US)
202540AQI (US)
Highest AQI (US) recorded in
October49AQI (US)
Lowest AQI (US) recorded in
June32AQI (US)
202436AQI (US)
Highest AQI (US) recorded in
July48AQI (US)
Lowest AQI (US) recorded in
September28AQI (US)
202337AQI (US)
Highest AQI (US) recorded in
April44AQI (US)
Lowest AQI (US) recorded in
August24AQI (US)
202240AQI (US)
Highest AQI (US) recorded in
August89AQI (US)
Lowest AQI (US) recorded in
December36AQI (US)
202138AQI (US)
Highest AQI (US) recorded in
May42AQI (US)
Lowest AQI (US) recorded in
April33AQI (US)
202038AQI (US)
Highest AQI (US) recorded in
August45AQI (US)
Lowest AQI (US) recorded in
September32AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Ichihara's annual 2026 AQI (US) (37) shows an average percentage change of -2.9% (improved AQI (US)) compared to previous years: 2020 (38), 2021 (38), 2022 (40), 2023 (37), 2024 (36), 2025 (40).