• October 21, 2026
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Last updated on October 1st, 2026 at 09:46 am

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Air Quality Niigata Prefecture

Niigata Prefecture AQI – Detailed Air Quality

Display current air quality index and forecast for the upcoming days in Niigata Prefecture.

Today’s Air Quality Index (AQI)
Real-time PM2.5, PM10 air pollution level in Niigata City, Niigata Capital
10:50 AM, October 21, 2026
Last updated on: 10:50 AM
Live AQI 15
Air Quality is Good
PM₂.₅: 3.09µg/m³ PM₁₀: 3.69µg/m³
Good Air is clean and safe. No health risks expected. Everyone can enjoy outdoor activities without concern.
Good Moderate Poor Unhealthy Severe Hazardous 0 50 100 150 200 250 300+
Air Quality Hourly Forecast
6
Min at 3:00 PM on Oct 21
28
Max at 11:00 PM on Oct 21, 2026

Niigata Prefecture Historical Air Quality Data

Display historical AQI data calendar by selecting a specific date and location Niigata Prefecture.

Niigata City, Niigata Capital Historical Air Quality Data

Explore historical AQI data and pollutant changes over time.
Oct 21, 2026 10:50 AM
SUNMONTUEWEDTHUFRISAT
30
50
Good
PM2.5: 10
AQI
50
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 10 µg/m3
PM₁₀ 11 µg/m3
SO₂ 7 µg/m3
NO₂ 4 µg/m3
O₃ 19 µg/m3
CO 123 µg/m3
AQI Hourly Forecast Graph
40
Min at 2:00 PM on Aug 30
69
Max at 12:00 AM on Aug 30, 2026
31
64
Moderate
PM2.5: 14
AQI
64
Air Quality is Moderate Air is acceptable, but sensitive individuals should closely monitor their symptoms.
PM₂.₅ 14 µg/m3
PM₁₀ 14 µg/m3
SO₂ 6 µg/m3
NO₂ 4 µg/m3
O₃ 36 µg/m3
CO 137 µg/m3
AQI Hourly Forecast Graph
58
Min at 7:00 PM on Aug 31
70
Max at 4:00 AM on Aug 31, 2026
01
74
Moderate
PM2.5: 17
AQI
74
Air Quality is Moderate Air is acceptable, but sensitive individuals should closely monitor their symptoms.
PM₂.₅ 17 µg/m3
PM₁₀ 18 µg/m3
SO₂ 6 µg/m3
NO₂ 4 µg/m3
O₃ 36 µg/m3
CO 145 µg/m3
AQI Hourly Forecast Graph
64
Min at 1:00 AM on Sep 1
81
Max at 4:00 AM on Sep 1, 2026
02
61
Moderate
PM2.5: 13
AQI
61
Air Quality is Moderate Air is acceptable, but sensitive individuals should closely monitor their symptoms.
PM₂.₅ 13 µg/m3
PM₁₀ 14 µg/m3
SO₂ 6 µg/m3
NO₂ 3 µg/m3
O₃ 48 µg/m3
CO 127 µg/m3
AQI Hourly Forecast Graph
50
Min at 7:00 AM on Sep 2
68
Max at 1:00 AM on Sep 2, 2026
03
50
Good
PM2.5: 10
AQI
50
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 10 µg/m3
PM₁₀ 10 µg/m3
SO₂ 4 µg/m3
NO₂ 4 µg/m3
O₃ 21 µg/m3
CO 134 µg/m3
AQI Hourly Forecast Graph
33
Min at 5:00 PM on Sep 3
64
Max at 1:00 AM on Sep 3, 2026
04
45
Good
PM2.5: 9
AQI
45
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 9 µg/m3
PM₁₀ 10 µg/m3
SO₂ 6 µg/m3
NO₂ 4 µg/m3
O₃ 31 µg/m3
CO 129 µg/m3
AQI Hourly Forecast Graph
41
Min at 6:00 AM on Sep 4
52
Max at 11:00 PM on Sep 4, 2026
05
35
Good
PM2.5: 7
AQI
35
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 7 µg/m3
PM₁₀ 8 µg/m3
SO₂ 6 µg/m3
NO₂ 3 µg/m3
O₃ 54 µg/m3
CO 145 µg/m3
AQI Hourly Forecast Graph
15
Min at 12:00 AM on Sep 5
48
Max at 1:00 AM on Sep 5, 2026
06
5
Good
PM2.5: 1
AQI
5
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 1 µg/m3
PM₁₀ 2 µg/m3
SO₂ 3 µg/m3
NO₂ 2 µg/m3
O₃ 59 µg/m3
CO 145 µg/m3
AQI Hourly Forecast Graph
5
Min at 6:00 AM on Sep 6
12
Max at 1:00 AM on Sep 6, 2026
07
35
Good
PM2.5: 7
AQI
35
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 7 µg/m3
PM₁₀ 7 µg/m3
SO₂ 6 µg/m3
NO₂ 4 µg/m3
O₃ 29 µg/m3
CO 144 µg/m3
AQI Hourly Forecast Graph
13
Min at 1:00 AM on Sep 7
60
Max at 12:00 AM on Sep 7, 2026
08
50
Good
PM2.5: 10
AQI
50
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 10 µg/m3
PM₁₀ 11 µg/m3
SO₂ 6 µg/m3
NO₂ 5 µg/m3
O₃ 20 µg/m3
CO 163 µg/m3
AQI Hourly Forecast Graph
31
Min at 11:00 PM on Sep 8
69
Max at 2:00 AM on Sep 8, 2026
09
15
Good
PM2.5: 3
AQI
15
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 3 µg/m3
PM₁₀ 4 µg/m3
SO₂ 5 µg/m3
NO₂ 3 µg/m3
O₃ 44 µg/m3
CO 201 µg/m3
AQI Hourly Forecast Graph
11
Min at 10:00 AM on Sep 9
30
Max at 1:00 AM on Sep 9, 2026
10
45
Good
PM2.5: 9
AQI
45
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 9 µg/m3
PM₁₀ 10 µg/m3
SO₂ 6 µg/m3
NO₂ 4 µg/m3
O₃ 30 µg/m3
CO 201 µg/m3
AQI Hourly Forecast Graph
23
Min at 1:00 AM on Sep 10
62
Max at 12:00 AM on Sep 10, 2026
11
71
Moderate
PM2.5: 16
AQI
71
Air Quality is Moderate Air is acceptable, but sensitive individuals should closely monitor their symptoms.
PM₂.₅ 16 µg/m3
PM₁₀ 17 µg/m3
SO₂ 6 µg/m3
NO₂ 5 µg/m3
O₃ 26 µg/m3
CO 209 µg/m3
AQI Hourly Forecast Graph
64
Min at 1:00 AM on Sep 11
83
Max at 12:00 AM on Sep 11, 2026
12
67
Moderate
PM2.5: 15
AQI
67
Air Quality is Moderate Air is acceptable, but sensitive individuals should closely monitor their symptoms.
PM₂.₅ 15 µg/m3
PM₁₀ 15 µg/m3
SO₂ 6 µg/m3
NO₂ 3 µg/m3
O₃ 33 µg/m3
CO 195 µg/m3
AQI Hourly Forecast Graph
59
Min at 8:00 PM on Sep 12
92
Max at 2:00 AM on Sep 12, 2026
13
61
Moderate
PM2.5: 13
AQI
61
Air Quality is Moderate Air is acceptable, but sensitive individuals should closely monitor their symptoms.
PM₂.₅ 13 µg/m3
PM₁₀ 13 µg/m3
SO₂ 6 µg/m3
NO₂ 3 µg/m3
O₃ 32 µg/m3
CO 180 µg/m3
AQI Hourly Forecast Graph
48
Min at 6:00 PM on Sep 13
70
Max at 2:00 AM on Sep 13, 2026
14
30
Good
PM2.5: 6
AQI
30
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 6 µg/m3
PM₁₀ 7 µg/m3
SO₂ 5 µg/m3
NO₂ 3 µg/m3
O₃ 32 µg/m3
CO 123 µg/m3
AQI Hourly Forecast Graph
17
Min at 8:00 AM on Sep 14
55
Max at 1:00 AM on Sep 14, 2026
15
40
Good
PM2.5: 8
AQI
40
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 8 µg/m3
PM₁₀ 8 µg/m3
SO₂ 6 µg/m3
NO₂ 4 µg/m3
O₃ 29 µg/m3
CO 124 µg/m3
AQI Hourly Forecast Graph
32
Min at 12:00 AM on Sep 15
50
Max at 2:00 AM on Sep 15, 2026
16
35
Good
PM2.5: 7
AQI
35
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 7 µg/m3
PM₁₀ 7 µg/m3
SO₂ 6 µg/m3
NO₂ 4 µg/m3
O₃ 26 µg/m3
CO 136 µg/m3
AQI Hourly Forecast Graph
28
Min at 5:00 AM on Sep 16
45
Max at 12:00 AM on Sep 16, 2026
17
50
Good
PM2.5: 10
AQI
50
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 10 µg/m3
PM₁₀ 11 µg/m3
SO₂ 6 µg/m3
NO₂ 3 µg/m3
O₃ 44 µg/m3
CO 142 µg/m3
AQI Hourly Forecast Graph
43
Min at 3:00 AM on Sep 17
59
Max at 12:00 AM on Sep 17, 2026
18
54
Moderate
PM2.5: 11
AQI
54
Air Quality is Moderate Air is acceptable, but sensitive individuals should closely monitor their symptoms.
PM₂.₅ 11 µg/m3
PM₁₀ 12 µg/m3
SO₂ 6 µg/m3
NO₂ 3 µg/m3
O₃ 49 µg/m3
CO 124 µg/m3
AQI Hourly Forecast Graph
40
Min at 7:00 AM on Sep 18
68
Max at 12:00 AM on Sep 18, 2026
19
50
Good
PM2.5: 10
AQI
50
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 10 µg/m3
PM₁₀ 10 µg/m3
SO₂ 6 µg/m3
NO₂ 2 µg/m3
O₃ 38 µg/m3
CO 114 µg/m3
AQI Hourly Forecast Graph
26
Min at 8:00 AM on Sep 19
73
Max at 12:00 AM on Sep 19, 2026
20
30
Good
PM2.5: 6
AQI
30
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 6 µg/m3
PM₁₀ 7 µg/m3
SO₂ 5 µg/m3
NO₂ 2 µg/m3
O₃ 39 µg/m3
CO 113 µg/m3
AQI Hourly Forecast Graph
25
Min at 8:00 AM on Sep 20
76
Max at 1:00 AM on Sep 20, 2026
21
15
Good
PM2.5: 3
AQI
15
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 3 µg/m3
PM₁₀ 5 µg/m3
SO₂ 4 µg/m3
NO₂ 3 µg/m3
O₃ 42 µg/m3
CO 120 µg/m3
AQI Hourly Forecast Graph
10
Min at 12:00 PM on Sep 21
28
Max at 1:00 AM on Sep 21, 2026
22
45
Good
PM2.5: 9
AQI
45
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 9 µg/m3
PM₁₀ 16 µg/m3
SO₂ 4 µg/m3
NO₂ 3 µg/m3
O₃ 46 µg/m3
CO 127 µg/m3
AQI Hourly Forecast Graph
21
Min at 1:00 AM on Sep 22
71
Max at 12:00 AM on Sep 22, 2026
23
61
Moderate
PM2.5: 13
AQI
61
Air Quality is Moderate Air is acceptable, but sensitive individuals should closely monitor their symptoms.
PM₂.₅ 13 µg/m3
PM₁₀ 16 µg/m3
SO₂ 7 µg/m3
NO₂ 4 µg/m3
O₃ 45 µg/m3
CO 145 µg/m3
AQI Hourly Forecast Graph
54
Min at 6:00 PM on Sep 23
79
Max at 2:00 AM on Sep 23, 2026
24
40
Good
PM2.5: 8
AQI
40
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 8 µg/m3
PM₁₀ 10 µg/m3
SO₂ 5 µg/m3
NO₂ 5 µg/m3
O₃ 41 µg/m3
CO 139 µg/m3
AQI Hourly Forecast Graph
30
Min at 11:00 AM on Sep 24
59
Max at 2:00 AM on Sep 24, 2026
25
35
Good
PM2.5: 7
AQI
35
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 7 µg/m3
PM₁₀ 9 µg/m3
SO₂ 5 µg/m3
NO₂ 4 µg/m3
O₃ 48 µg/m3
CO 135 µg/m3
AQI Hourly Forecast Graph
29
Min at 1:00 PM on Sep 25
55
Max at 1:00 AM on Sep 25, 2026
26
54
Moderate
PM2.5: 11
AQI
54
Air Quality is Moderate Air is acceptable, but sensitive individuals should closely monitor their symptoms.
PM₂.₅ 11 µg/m3
PM₁₀ 12 µg/m3
SO₂ 7 µg/m3
NO₂ 3 µg/m3
O₃ 35 µg/m3
CO 140 µg/m3
AQI Hourly Forecast Graph
44
Min at 1:00 AM on Sep 26
77
Max at 12:00 AM on Sep 26, 2026
27
64
Moderate
PM2.5: 14
AQI
64
Air Quality is Moderate Air is acceptable, but sensitive individuals should closely monitor their symptoms.
PM₂.₅ 14 µg/m3
PM₁₀ 15 µg/m3
SO₂ 7 µg/m3
NO₂ 4 µg/m3
O₃ 33 µg/m3
CO 138 µg/m3
AQI Hourly Forecast Graph
60
Min at 12:00 PM on Sep 27
79
Max at 1:00 AM on Sep 27, 2026
28
35
Good
PM2.5: 7
AQI
35
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 7 µg/m3
PM₁₀ 7 µg/m3
SO₂ 4 µg/m3
NO₂ 5 µg/m3
O₃ 23 µg/m3
CO 157 µg/m3
AQI Hourly Forecast Graph
25
Min at 9:00 AM on Sep 28
59
Max at 1:00 AM on Sep 28, 2026
29
30
Good
PM2.5: 6
AQI
30
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 6 µg/m3
PM₁₀ 8 µg/m3
SO₂ 4 µg/m3
NO₂ 5 µg/m3
O₃ 28 µg/m3
CO 151 µg/m3
AQI Hourly Forecast Graph
24
Min at 6:00 AM on Sep 29
52
Max at 12:00 AM on Sep 29, 2026
30
74
Moderate
PM2.5: 17
AQI
74
Air Quality is Moderate Air is acceptable, but sensitive individuals should closely monitor their symptoms.
PM₂.₅ 17 µg/m3
PM₁₀ 19 µg/m3
SO₂ 7 µg/m3
NO₂ 6 µg/m3
O₃ 38 µg/m3
CO 162 µg/m3
AQI Hourly Forecast Graph
55
Min at 1:00 AM on Sep 30
90
Max at 12:00 AM on Sep 30, 2026
01
58
Moderate
PM2.5: 12
AQI
58
Air Quality is Moderate Air is acceptable, but sensitive individuals should closely monitor their symptoms.
PM₂.₅ 12 µg/m3
PM₁₀ 15 µg/m3
SO₂ 5 µg/m3
NO₂ 4 µg/m3
O₃ 55 µg/m3
CO 147 µg/m3
AQI Hourly Forecast Graph
26
Min at 10:00 PM on Oct 1
101
Max at 2:00 AM on Oct 1, 2026
02
25
Good
PM2.5: 5
AQI
25
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 5 µg/m3
PM₁₀ 8 µg/m3
SO₂ 4 µg/m3
NO₂ 3 µg/m3
O₃ 59 µg/m3
CO 148 µg/m3
AQI Hourly Forecast Graph
23
Min at 1:00 PM on Oct 2
30
Max at 4:00 AM on Oct 2, 2026
03
30
Good
PM2.5: 6
AQI
30
Air Quality is Good Air quality is excellent. No health concerns for any group.
PM₂.₅ 6 µg/m3
PM₁₀ 10 µg/m3
SO₂ 7 µg/m3
NO₂ 3 µg/m3
O₃ 61 µg/m3
CO 146 µg/m3
AQI Hourly Forecast Graph
24
Min at 1:00 AM on Oct 3
48
Max at 12:00 AM on Oct 3, 2026

Niigata Prefecture Historical Weather Data

Display historical weather data by selecting a specific date and location Niigata Prefecture.

Display historical weather data by selecting a specific date and location Niigata Prefecture.

Niigata City, Niigata CapitalOct 20, 2026
weather image
19 °C | °F
Moderate or heavy rain shower
Max 20 °
Min 17 °
Humidity 89 %
Wind 67 Km/h
Visibility 8 km
UV Index 0.3
Sunrise 5:57 AM
Sunset 4:59 PM
Moon Phase 77
Precipitation 46.51 mm
Snow 0 mm/h
Rain Chance 100%
Historical Weather from WeatherAPI

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