Japan · The summary is refreshed every 15 minutes.
November 12
The air is clean now
Measured 05:00
Asahikawa
-1°C
Partly cloudy
1024
hPaAtmospheric
pressure
81%
Humidity
Asahikawa, November 10, 2026: daily mean PM2.5 5 µg/m³ (4 sensors), level “Low” — as in the Atmy Data Hub. Now (07:00 local time): 7.8 µg/m³. Open methodology and data in JSON: Methodology and data sources · JSON
Right now in Asahikawa, PM2.5 averages 7.8 µg/m³ — “good” on the US EPA scale (approximate, from hourly readings). Mean of 4 sensors from Government stations, readings from 05:00–05:00 local time (20:00–20:00 UTC), summary prepared at 07:00 local time. Median: 7.0 µg/m³; range across sensors: 5.0–12.0 µg/m³.
In Asahikawa the air is good 🟢 AQI 43. About the same as three hours ago. ⛅ -1 °C · No precipitation · Wind 2 m/s
In Asahikawa the air is good right now (approximate, US EPA scale). From 18:00 to 07:00 local time the city mean PM2.5 fell from 12.5 to 7.8 µg/m³. The highest hour was 19:00 with 15.0 µg/m³.
The weather data do not point to a clear reason for this level.
Weather now: partly cloudy, -1°C, wind 2 m/s, humidity 81%. No major change in the wind is expected in the coming hours. By 18:00 the temperature will be about 6°C.
Written automatically at 07:00 local time (22:00 UTC) from sensor measurements and the weather forecast. Values are approximate; hypotheses are marked.
2 m/s
Wind, S
0 mm
Precipitation today
5 µg/m³ Low
Daily mean PM2.5 on November 10, 2026 (00:00–24:00 UTC = 09:00–09:00 UTC+9): 5 µg/m³ from 4 sensors that passed the quality check — the same value as in the Atmy Data Hub.
39/100Moderate · An estimate of weather conditions · not a PM2.5 forecast
9°/-1°
Index by time of day
52/100Moderate
Night
Morning
Day
Evening12°/2°
Index by time of day
39/100Moderate
NightMorningDayEvening9°/-1°
Index by time of day
47/100Moderate
NightMorningDayEvening9°/-3°
Index by time of day
57/100Moderate
NightMorningDayEvening4°/-3°
Index by time of day
42/100Moderate
NightMorningDayEvening2°/-3°
Index by time of day
57/100Moderate
NightMorningDayEveningForecast of conditions that trap pollution near the surface
-1°
Partly cloudy. Feels like -5°C
5°C63%8°C70%
6°C89%2m/sWind from the S
4m/sWind gusts
Wind force: 2
Gusts up to 6 m/s are expected.
Japan
9°C-1°C12°C2°C
9°C-1°C9°C-3°C
4°C-3°C2°C-3°C
4°C-3°C9°C-1°C
0°C-3°C4°C-3°C
Highest current reading: 12.0 µg/m³ (北門 (環境省 大気汚染物質広域監視システム（そらまめくん） — 旭川市)). Lowest: 5.0 µg/m³ (永山 (環境省 大気汚染物質広域監視システム（そらまめくん） — 旭川市)). The list shows every sensor, highest first.
Source: atmy.ai monitoring network
Sensors in the summary by network: Government stations — 4 sensors.
Atmy shows the networks’ readings after the Data Hub’s quality check: test devices and sensors that fail it are left out.
921
TokyoJapan
49NagoyaJapan
18KobeJapan
16Cities with the most sensors
All sensors on the map, by city as the map assigns them; the city’s values count only the sensors that pass the Data Hub’s quality check.
Daily mean PM2.5 of the city sensors, µg/m³
Click a day to see its date and value.
An Atmy card with the air quality in Asahikawa now: it is refreshed every 15 minutes and links to this page. Paste the code into your site.
Japan · City ranking · All pilot cities
Daily mean PM2.5 on November 10, 2026 (00:00–24:00 UTC = 09:00–09:00 UTC+9): 5 µg/m³ from 4 sensors that passed the quality check — the same value as in the Atmy Data Hub. No. 12 of 43 cities in Japan and No. 617 of 676 worldwide, from the most polluted.
Right now in Asahikawa, PM2.5 averages 7.8 µg/m³ — “good” on the US EPA scale (approximate, from hourly readings). Mean of 4 sensors from Government stations, readings from 05:00–05:00 local time (20:00–20:00 UTC), summary prepared at 07:00 local time. Median: 7.0 µg/m³; range across sensors: 5.0–12.0 µg/m³.
The current level is “good” (US EPA scale, approximate). Air quality is satisfactory; no restrictions are recommended. This is the standard guidance of the scale, not medical advice.
Highest current reading: 12.0 µg/m³ (北門 (環境省 大気汚染物質広域監視システム（そらまめくん） — 旭川市)). Lowest: 5.0 µg/m³ (永山 (環境省 大気汚染物質広域監視システム（そらまめくん） — 旭川市)). The list shows every sensor, highest first.
From Atmy sensors and connected public networks (citizen, experimental and government monitors), aggregated by Atmy. Values are approximate; see the methodology.
The summary is rebuilt every 15 minutes from the latest reading of each sensor, each no older than one hour.
The daily value is the Data Hub’s: the mean of the city’s sensors that passed the nightly quality check, each with at least 12 valid hours, and only with sensors at four places 500 m apart; days are UTC.
“Now” uses the same sensors and rule: the mean of their latest readings, each at most 60 minutes old, shown only with sensors at four places 500 m apart reporting.
Source: public Atmy monitoring data. Methodology and data sources · Data terms
