Guyancourt weather
At 5:30 AM local time it was mostly clear and 5°C (41°F). Little to no rain in the next 24 hours. Best months for weather: May–Sep. Guyancourt sits 162 m (532 ft) above sea level, which keeps it cooler than the coast. Below: today's sky, the hour-by-hour rain chance and the 16-day forecast for Guyancourt, Île-de-France, France.
Current conditions
- Clouds
- 23%
- Chance of rain
- 0%
- Rain
- 0.0 mm/h
Hourly Forecast
Little to no rain in the next 24 hours
Daily Forecast
Best Time to Visit
Peak season May–SepOff season Nov–Feb
About Guyancourt weather
Is it raining in Guyancourt right now?
No. It’s mostly clear and 5° right now. Little to no rain in the next 24 hours.
What’s the weather like in Guyancourt this week?
Over the next 7 days, expect highs of 6–12° and lows of 0–5°. Rain is likely on 1 of 7 days (Monday). The driest day looks like Sunday.
Has it been raining in Guyancourt lately?
In the past 7 days, Guyancourt had 1 rainy day and 9.8 mm of rain in total.
What should I pack for Guyancourt?
For the coming week, bring an umbrella or rain jacket and a warm winter coat.
Guyancourt weather by month
When is the best time to visit Guyancourt?
Based on weather alone, the best time to visit Guyancourt is May–Sep, according to NASA's 2001–2025 climate averages. Nov–Feb tends to be the least pleasant. Average highs run from 6°C (43°F) in January to 24°C (76°F) in July.
What is the rainiest month in Guyancourt?
December is the wettest month, with about 71 mm (2.8 in) of rain on average. April is the driest, with about 41 mm (1.6 in).
What is the hottest month in Guyancourt?
July is the warmest, with average highs of 24°C (76°F) and lows of 13°C (56°F). January is the coolest, with highs of 6°C (43°F) and lows of 0°C (32°F).
Does Guyancourt have a rainy season?
Not a strong one. No month averages more than 150 mm of rain; the wettest is December at about 71 mm (2.8 in).
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), forecast and current conditions from Open-Meteo. Page updated . How we rate months