France · The summary is refreshed every 15 minutes.
No current value: fewer than four sensors at different places are reporting now.
Rouen, November 10, 2026: daily mean PM2.5 14 µg/m³ (8 sensors), level “Moderate” — as in the Atmy Data Hub. Open methodology and data in JSON: Methodology and data sources · JSON
There are not enough fresh measurements for Rouen right now. From 10:00 to 18:00 local time the city mean PM2.5 stayed roughly level: from 7.4 to 7.2 µg/m³.
The weather data do not point to a clear reason for this level.
Weather now: fog, 11°C, wind 1 m/s, humidity 96%. No major change in the wind is expected in the coming hours. By 10:00 the temperature will be about 8°C.
Written automatically at 22:10 local time (21:10 UTC) from sensor measurements and the weather forecast. Values are approximate; hypotheses are marked.
1 m/s
Wind, NNW
0.8 mm
Precipitation today
14 µg/m³ Moderate
Daily mean PM2.5 on November 10, 2026 (00:00–24:00 UTC = 01:00–01:00 UTC+1): 14 µg/m³ from 8 sensors that passed the quality check — the same value as in the Atmy Data Hub.
Monthly means of quality-checked sensors, as in the Data Hub trend; the current month is still incomplete, “-” means no data.
25/100Low · An estimate of weather conditions · not a PM2.5 forecast
15°/11°
Index by time of day
53/100Moderate
Night
Morning
Day
Evening11°/7°
Index by time of day
38/100Moderate
NightMorningDayEvening10°/1°
Index by time of day
47/100Moderate
NightMorningDayEvening9°/0°
Index by time of day
57/100Moderate
NightMorningDayEvening14°/2°
Index by time of day
56/100Moderate
NightMorningDayEvening12°/7°
Index by time of day
50/100Moderate
NightMorningDayEveningForecast of conditions that trap pollution near the surface
11°
Fog. Feels like 11°C
12°C97%
15°C84%12°C95%1m/sWind from the NNW
3m/sWind gusts
Wind force: 1
Light wind is expected over the next few hours.
France
15°C11°C11°C7°C
10°C1°C9°C0°C14°C2°C12°C7°C17°C10°C13°C10°C
11°C6°C8°C4°C207
RennesFrance
20ToulouseFrance
18VilleurbanneFrance
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.
France · City ranking · All pilot cities
Daily mean PM2.5 on November 10, 2026 (00:00–24:00 UTC = 01:00–01:00 UTC+1): 14 µg/m³ from 8 sensors that passed the quality check — the same value as in the Atmy Data Hub. No. 9 of 32 cities in France and No. 449 of 676 worldwide, from the most polluted.
Fresh data for Rouen are insufficient (last update: 21:45 local time, 20:45 UTC). Open the map for the latest readings of individual sensors.
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
