How accurate is the forecast for Marcoussis?

Forecasts are pulled from leading meteorological models and refreshed automatically every 30 minutes. Short-range accuracy (next 24 hours) is typically within 1–2°C and 80–90% for precipitation.

How often is the data updated?

Current conditions and the hourly outlook refresh every 30 minutes; daily forecasts every hour.

What does the air-quality (AQI) value mean?

We display the European AQI on a scale from Good (0–20) to Extremely poor (>100), blending PM2.5, PM10, NO₂ and O₃.

Clima Map

Marcoussis FR

June 30, 2026 · 12:35 pm

27^°

Partly cloudy

Feels like 29°C

Humidity: 43%
Wind: 5 km/h NNW
Pressure: 1022 hPa
Cloud: 75%

July 2, 2026 · July 2, 2026

Overcast

25°C · 14°C

Rain: 0 mm · UV: 7.3 · Wind: 22 km/h

Nearby weather

Cities near Marcoussis

Compare weather conditions in surrounding cities and open any local forecast instantly.

2.1 km Linas FR View forecast 2.7 km Montlhéry FR View forecast 2.7 km La Ville-du-Bois FR View forecast 4 km Longpont-sur-Orge FR View forecast 5.1 km Saint-Germain-lès-Arpajon FR View forecast 5.2 km Saint-Michel-sur-Orge FR View forecast 5.8 km Arpajon FR View forecast 5.9 km Brétigny-sur-Orge FR View forecast

Weather notice Forecasts are for general planning. During severe weather, follow official alerts and local authority instructions.