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April Weather in Grignon, France

Last updated: August 23, 2025

In April, the average temperature in Grignon, France hovers around 5°C (42°F). Expect chilly days where temperatures can dip as low as -13°C (8°F), but also some warmth with highs reaching 20°C (68°F). Be prepared for 82 mm (3.2 in) of precipitation spread over 11 days, and remember that the average humidity is a notable 83%, making the air feel quite brisk!

April Temperature in Grignon

In April in Grignon, the average temperature is 5°C (42°F). The maximum can reach 20°C (68°F), while the minimum can drop as low as -13°C (8°F). It's essential to pack layers and be prepared for fluctuating temperatures, making it a unique time for exploration and adventure.

April Weather in Grignon: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Grignon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grignon, April typically has an average temperature of 5°C (42°F), with highs reaching up to 20°C (68°F) and lows dropping to around -13°C (8°F).
JanFebMarAprMayJunJulAugSepOctNovDec233035424857616053453426
Data source: Temperature data for Grignon generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Grignon

In Grignon in April, the precipitation amount is 82 mm (3.2 in) over the course of 11 days.

April Precipitation Trends in Grignon

The chart displays monthly precipitation patterns in Grignon, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Grignon, April typically receives around 82 mm (3.2 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec1531241608220314410310785115114264
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Grignon

In Grignon in April, humidity is 83%. With an average temperature of 5°C (42°F), this humidity feels like a heavy blanket wrapping around you, making even the simplest outdoor activities feel exhausting and uncomfortable for traveling.

April Average Humidity in Grignon

This chart illustrates the average monthly humidity levels in Grignon, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Grignon is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%87%84%83%78%75%72%63%73%89%91%90%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Grignon

In Grignon in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Grignon.

Maximum UV Index Levels in Grignon for April

The chart shows the monthly maximum UV Index (UVI) for Grignon in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In April, the maximum UV index in Grignon typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34789101097532
Data source: Grignon April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How April Weather in Grignon Compares to Other Months

Weather in Grignon varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Grignon, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Grignon, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)153 mm (6.0 inches)91%moderate
February Weather-1°C (30°F)124 mm (4.9 inches)87%moderate
March Weather2°C (35°F)160 mm (6.3 inches)84%high
April Weather5°C (42°F)82 mm (3.2 inches)83%very high
May Weather9°C (48°F)203 mm (8.0 inches)78%very high
June Weather14°C (57°F)144 mm (5.7 inches)75%very high
July Weather16°C (61°F)103 mm (4.0 inches)72%very high
August Weather15°C (60°F)107 mm (4.2 inches)63%very high
September Weather11°C (53°F)85 mm (3.4 inches)73%high
October Weather7°C (45°F)115 mm (4.5 inches)89%moderate
November Weather1°C (35°F)114 mm (4.5 inches)90%moderate
December Weather-3°C (27°F)264 mm (10.4 inches)90%low

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