May Weather in Mer, France

Last updated: August 23, 2025

In Mer, France, the average temperature in May is a comfortable 15°C (59°F), but be prepared for fluctuations as it can dip to a chilly 1°C (33°F) or soar to a warm 32°C (89°F). Expect 78 mm (3.1 in) of precipitation over approximately 13 days, contributing to an average humidity level of 83%.

May Temperature in Mer

In May in Mer, the average temperature is 15°C (59°F), with maximums reaching 32°C (89°F) and minimums dropping as low as 1°C (33°F). This diverse range of temperatures makes it essential for travelers to pack layers to stay comfortable throughout the day.

May Weather in Mer: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Mer, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mer, May typically has an average temperature of 15°C (59°F), with highs reaching up to 32°C (89°F) and lows dropping to around 1°C (33°F).

Data source: Temperature data for Mer generated using information from the Copernicus Climate Change Service.

May Precipitation in Mer

In Mer in May, the precipitation amount is 78 mm (3.1 in) spread over 13 days.

May Precipitation Trends in Mer

The chart displays monthly precipitation patterns in Mer, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Mer, May typically receives around 78 mm (3.1 inches) of precipitation spread over approximately 13 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

May Humidity in Mer

In Mer in May humidity is 83%. With an average temperature of 15°C (59°F), this humidity feels like a cozy, damp embrace that can be quite stifling for traveling, making even short walks feel more exhausting than they should, and prompting a need for frequent breaks in shaded or air-conditioned areas.

May Average Humidity in Mer

This chart illustrates the average monthly humidity levels in Mer, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Mer is approximately 83%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Mer

In Mer in May, 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 Mer.

Maximum UV Index Levels in Mer for May

The chart shows the monthly maximum UV Index (UVI) for Mer in May, 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 May, the maximum UV index in Mer typically reaches 8, which falls under the very high exposure category.

Data source: Mer May 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 May Weather in Mer Compares to Other Months

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

This table compares monthly weather conditions in Mer, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	5°C (41°F)	56 mm (2.2 inches)	90%	low
February Weather	7°C (44°F)	62 mm (2.4 inches)	88%	moderate
March Weather	9°C (48°F)	66 mm (2.6 inches)	85%	moderate
April Weather	12°C (53°F)	35 mm (1.4 inches)	83%	high
May Weather	15°C (59°F)	78 mm (3.1 inches)	83%	very high
June Weather	19°C (67°F)	66 mm (2.6 inches)	79%	very high
July Weather	21°C (71°F)	38 mm (1.5 inches)	71%	very high
August Weather	21°C (70°F)	42 mm (1.6 inches)	68%	very high
September Weather	17°C (64°F)	40 mm (1.6 inches)	76%	high
October Weather	13°C (56°F)	78 mm (3.1 inches)	87%	moderate
November Weather	8°C (47°F)	68 mm (2.7 inches)	91%	low
December Weather	6°C (44°F)	95 mm (3.7 inches)	93%	low