Nagareyama, Saitama, Japan 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
Nagareyama, Saitama, Japan
AQI Trends: Highest and Lowest
Same Day Analysis (15th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 4th highest AQI at 24 of Good air quality, showing improvement over 2025, 2024 and 2023 on the same day.
Day & Night AQI Trend: 14th Aug - 15th Aug 2026
Nagareyama, Saitama, Japan
4 AM14th Aug 2026
6 PM
3 AM15th Aug 2026
36AQI
21AQI
36AQI
17AQI
In the last 24 hours,
Nagareyama's AQI reached its highest point of 36 at 5 PM during the Day, while the lowest point, 17, was recorded at 7 PM during the Night between 14th Aug and 15th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
Nagareyama, Saitama, Japan
28°C26/31°C
28°C25/31°C
28°C25/32°C
31°C26/36°C
31°C27/37°C
32°C28/37°C
32°C28/38°C
29°C26/34°C
28°C24/34°C
28°C25/32°C
26°C23/30°C
26°C23/31°C
29°C24/36°C
32°C27/37°C
31°C28/36°C
31°C26/37°C
29°C24/33°C
25°C23/27°C
25°C22/29°C
26°C23/31°C
29°C25/33°C
30°C26/34°C
30°C26/34°C
29°C26/34°C
27°C24/31°C
23°C20/27°C
23°C22/24°C
26°C23/30°C
26°C23/28°C
27°C24/31°C
33AQI
28AQI
32AQI
30AQI
2026 Days Vs Air Quality
Nagareyama, Saitama, Japan
86%
196
14%
31
Total number of days with different AQI categories in last 227 days in 2026 (138 days remaining)
Under WHO’s Safe Air Quality Limits: 86%
Health Risk Level:
Low
In 2026, 86% of 227 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
Nagareyama, Saitama, Japan
AQI levels in 2026
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
12AQI (US)
19AQI (US)
18AQI (US)
19AQI (US)
44AQI (US)
15AQI (US)
35AQI (US)
29AQI (US)
14AQI (US)
31AQI (US)
30AQI (US)
18AQI (US)
35AQI (US)
15AQI (US)
27AQI (US)
45AQI (US)
43AQI (US)
19AQI (US)
33AQI (US)
37AQI (US)
11AQI (US)
20AQI (US)
39AQI (US)
37AQI (US)
44AQI (US)
25AQI (US)
38AQI (US)
32AQI (US)
20AQI (US)
29AQI (US)
39AQI (US)
34AQI (US)
43AQI (US)
30AQI (US)
37AQI (US)
60AQI (US)
57AQI (US)
13AQI (US)
13AQI (US)
34AQI (US)
41AQI (US)
53AQI (US)
23AQI (US)
33AQI (US)
60AQI (US)
66AQI (US)
52AQI (US)
15AQI (US)
36AQI (US)
29AQI (US)
31AQI (US)
41AQI (US)
40AQI (US)
42AQI (US)
34AQI (US)
34AQI (US)
14AQI (US)
42AQI (US)
40AQI (US)
35AQI (US)
52AQI (US)
43AQI (US)
51AQI (US)
56AQI (US)
50AQI (US)
46AQI (US)
36AQI (US)
49AQI (US)
58AQI (US)
58AQI (US)
66AQI (US)
38AQI (US)
46AQI (US)
55AQI (US)
52AQI (US)
52AQI (US)
54AQI (US)
34AQI (US)
24AQI (US)
45AQI (US)
48AQI (US)
48AQI (US)
38AQI (US)
58AQI (US)
28AQI (US)
24AQI (US)
49AQI (US)
57AQI (US)
52AQI (US)
19AQI (US)
26AQI (US)
34AQI (US)
45AQI (US)
45AQI (US)
37AQI (US)
27AQI (US)
31AQI (US)
21AQI (US)
31AQI (US)
47AQI (US)
43AQI (US)
30AQI (US)
40AQI (US)
39AQI (US)
35AQI (US)
33AQI (US)
34AQI (US)
36AQI (US)
36AQI (US)
34AQI (US)
39AQI (US)
45AQI (US)
38AQI (US)
31AQI (US)
45AQI (US)
50AQI (US)
48AQI (US)
41AQI (US)
38AQI (US)
38AQI (US)
47AQI (US)
49AQI (US)
43AQI (US)
30AQI (US)
21AQI (US)
28AQI (US)
29AQI (US)
24AQI (US)
25AQI (US)
23AQI (US)
27AQI (US)
33AQI (US)
37AQI (US)
33AQI (US)
34AQI (US)
85AQI (US)
68AQI (US)
53AQI (US)
48AQI (US)
61AQI (US)
58AQI (US)
60AQI (US)
53AQI (US)
58AQI (US)
46AQI (US)
39AQI (US)
24AQI (US)
25AQI (US)
24AQI (US)
23AQI (US)
26AQI (US)
28AQI (US)
28AQI (US)
23AQI (US)
23AQI (US)
21AQI (US)
20AQI (US)
21AQI (US)
20AQI (US)
24AQI (US)
22AQI (US)
23AQI (US)
22AQI (US)
31AQI (US)
40AQI (US)
12AQI (US)
22AQI (US)
23AQI (US)
24AQI (US)
26AQI (US)
22AQI (US)
20AQI (US)
19AQI (US)
21AQI (US)
21AQI (US)
26AQI (US)
29AQI (US)
26AQI (US)
26AQI (US)
25AQI (US)
23AQI (US)
27AQI (US)
20AQI (US)
14AQI (US)
37AQI (US)
19AQI (US)
25AQI (US)
25AQI (US)
23AQI (US)
23AQI (US)
16AQI (US)
16AQI (US)
26AQI (US)
30AQI (US)
28AQI (US)
33AQI (US)
63AQI (US)
46AQI (US)
14AQI (US)
21AQI (US)
27AQI (US)
43AQI (US)
63AQI (US)
54AQI (US)
34AQI (US)
28AQI (US)
31AQI (US)
25AQI (US)
24AQI (US)
32AQI (US)
34AQI (US)
42AQI (US)
55AQI (US)
40AQI (US)
15AQI (US)
22AQI (US)
24AQI (US)
24AQI (US)
24AQI (US)
23AQI (US)
25AQI (US)
26AQI (US)
29AQI (US)
24AQI (US)
26AQI (US)
26AQI (US)
24AQI (US)
28AQI (US)
37AQI (US)
46AQI (US)
37AQI (US)
40AQI (US)
24AQI (US)
30AQI (US)
27AQI (US)
No. of days
202634AQI (US)
Highest AQI (US) recorded in
March46AQI (US)
Lowest AQI (US) recorded in
June24AQI (US)
202540AQI (US)
Highest AQI (US) recorded in
October49AQI (US)
Lowest AQI (US) recorded in
September33AQI (US)
202438AQI (US)
Highest AQI (US) recorded in
July47AQI (US)
Lowest AQI (US) recorded in
September30AQI (US)
202340AQI (US)
Highest AQI (US) recorded in
April47AQI (US)
Lowest AQI (US) recorded in
August27AQI (US)
202238AQI (US)
Highest AQI (US) recorded in
March47AQI (US)
Lowest AQI (US) recorded in
August24AQI (US)
202137AQI (US)
Highest AQI (US) recorded in
December45AQI (US)
Lowest AQI (US) recorded in
September32AQI (US)
202038AQI (US)
Highest AQI (US) recorded in
November45AQI (US)
Lowest AQI (US) recorded in
September29AQI (US)
Most & Least Polluted Years Over the Last 7 Years
Nagareyama's annual 2026 AQI (US) (34) shows an average percentage change of -11.6% (improved AQI (US)) compared to previous years: 2020 (38), 2021 (37), 2022 (38), 2023 (40), 2024 (38), 2025 (40).