Lillestrøm Air Quality Forecast - Today, Tomorrow
Air Quality Today
Today (19 October): Air quality in Lillestrøm is fair. AQI and NO2 are fair; PM2.5, PM10, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 PM (NO2: 27.3/100).
Air Quality Tomorrow
Tomorrow (20 October 2026): Air quality in Lillestrøm is good. AQI improves to good; NO2 decreases to good; all other pollutants stay as today. Pollution peaks around 10:00 AM (NO2: 24.8/100).
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Air Quality
Today - 19 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Fair | 22.5/100 |
| PM2.5 (fine particles) | Good | 16.0/100 |
| PM10 (coarse particles) | Good | 9.5/100 |
| NO2 (nitrogen dioxide) | Fair | 20.6/100 |
| O3 (ozone) | Good | 8.9/100 |
| SO2 (sulfur dioxide) | Good | 0.5/100 |
| CO (carbon monoxide) | Good | 0.7/100 |
| HCHO (formaldehyde) | Good | 2.9/100 |
| PM1 (ultrafine particles) | Good | 5.8/100 |
Tomorrow - 20 October
| Pollutant | Level | Value |
|---|---|---|
| AQI | Good | 13.9/100 |
| PM2.5 (fine particles) | Good | 10.5/100 |
| PM10 (coarse particles) | Good | 7.2/100 |
| NO2 (nitrogen dioxide) | Good | 13.0/100 |
| O3 (ozone) | Good | 8.9/100 |
| SO2 (sulfur dioxide) | Good | 0.3/100 |
| CO (carbon monoxide) | Good | 0.6/100 |
| HCHO (formaldehyde) | Good | 1.4/100 |
| PM1 (ultrafine particles) | Good | 3.0/100 |
Local Environmental Conditions
Around the center of Lillestrøm, dense development means road traffic is the main local source of nitrogen dioxide and fine particles. In cold weather, wood burning and other home heating become a noticeable source of fine particles. Parks and street trees provide a modest buffer against traffic pollution. Winds are often light, which allows pollutants to linger close to where they are produced.
From October to April, temperatures near -7°C, with winds of around 10 km/h, let smoke and particles from home heating and traffic build up, especially on cold, still mornings. By contrast, summers are mild, averaging around 17°C in the warmest month, so ozone usually stays moderate even in July. Short-term changes follow the weather: calm spells raise levels, while breezy or rainy days lower them.
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Frequently Asked Questions About Air Quality in Akershus
Is air quality bad in Lillestrøm right now?
On 19 October 2026, overall air quality in Lillestrøm is fair. AQI is the main air quality indicator at 22.5/100. Pollution peaks around 6:00 PM (NO2: 27.3/100).
Will air quality be worse tomorrow in Lillestrøm?
On 20 October 2026, air quality conditions in Lillestrøm will be better than today, with AQI forecast at good at 13.9/100. Pollution peaks around 10:00 AM (NO2: 24.8/100).
When is air pollution at its worst in Lillestrøm?
From October to April, temperatures near -7°C, with winds of around 10 km/h, let smoke and particles from home heating and traffic build up, especially on cold, still mornings. By contrast, summers are mild, averaging around 17°C in the warmest month, so ozone usually stays moderate even in July. Short-term changes follow the weather: calm spells raise levels, while breezy or rainy days lower them.
Are air quality levels in Lillestrøm based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
Understanding the Scale
The 0–100 air quality scores represent risk levels, not direct air pollutant concentrations. Higher scores indicate higher risk.
Air Quality
| Good | 0-20 | Low air quality risk. Air quality is expected to be good, with low levels of pollution. |
| Fair | 20-40 | Generally low air quality risk. Air quality is expected to be acceptable, with some pollution present. |
| Moderate | 40-60 | Moderate air quality risk. Air pollution is elevated and air quality may be less favorable. |
| Poor | 60-80 | High air quality risk. Air pollution is high and air quality is expected to be poor. |
| Very Poor | 80-100 | Very high air quality risk. Air pollution is very high and air quality is expected to be very poor. |