May weather forecastCalais, France

The intricate design of the iconic Calais City Hall, France, well-manicured lawns with beautiful flower gardens and trees visible

May

Weather in May

May, the last month of the spring in Calais, is a moderate month, with an average temperature fluctuating between 10.2°C (50.4°F) and 13.8°C (56.8°F).

Temperature

As April transitions into May, Calais records an average high-temperature of a mild 13.8°C (56.8°F), showing a gentle shift from the preceding month. Calais's nighttime average temperature in May drops marginally from the daytime highs, settling at a fresh 10.2°C (50.4°F).

Humidity

The average relative humidity in May in Calais is 81%.

Rainfall

In Calais, in May, it is raining for 12.7 days, with typically 25mm (0.98") of accumulated precipitation. In Calais, during the entire year, the rain falls for 178.1 days and collects up to 461mm (18.15") of precipitation.

Snowfall

In Calais, snow does not fall in April through October.

Sea temperature

In Calais, in May, the average water temperature is 11.8°C (53.2°F).
Note: Danger awaits those who swim in 11.8°C (53.2°F) without protection. Falling below 10°C (50°F) means intense cold shock and hyperventilation.

Daylight

In Calais, France, the average length of the day in May is 15h and 34min.
On the first day of the month, sunrise is at 06:24 and sunset at 21:14. On the last day of May, sunrise is at 05:43 and sunset at 21:56 CEST.

Sunshine

The average sunshine in May is 8.8h.

UV index

In May, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.
Note: A maximum high daily UV index of 4 during May translates into the following directions:
Undertake precautions - Obligation exists to protect against skin and eye damage. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.

Updated: Feb 8, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Calais in May has an average high-temperature of 13.8°C (56.8°F) and an average low-temperature of 10.2°C (50.4°F).

The average relative humidity in May in Calais, France, is 81%.

In Calais, France, in May, during 12.7 rainfall days, 25mm (0.98") of precipitation is typically accumulated.

In Calais, snow does not fall in April through October.

In May, the average sea temperature in Calais is 11.8°C (53.2°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

The average day length in May is 15h and 34min.

In May, on the first day of the month, sunrise is at 06:24 and sunset at 21:14. On the last day of the month, sunrise is at 05:43 and sunset at 21:56 CEST.

In May, the average sunshine duration is 8.8h.

In May, the average daily maximum UV index in Calais, France, is 4. A UV Index reading of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A May J J A S O N D

Apr

May

Jun

Average high temperature

11.6°C

13.8°C

16.4°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

20.2km/h

20.6km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

0.2

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

15.7

14.7

15.3

Average UV index

Average cloud cover

Average visibility

Average temperature in May
Calais, France

Average high temperature in May: 13.8°C

The warmest month (with the highest average high temperature) is August (19.7°C).
The month with the lowest average high temperature is February (7.1°C).

Average low temperature in May: 10.2°C

The month with the highest average low temperature is August (15.9°C).
The coldest months (with the lowest average low temperature) are January and February (4.5°C).

Average pressure in May
Calais, France

Average pressure in May: 1016.9mbar

The month with the highest atmospheric pressure is September (1017.4mbar).
The month with the lowest atmospheric pressure is November (1011.5mbar).

Average wind speed in May
Calais, France

Average wind speed in May: 19.5km/h

The windiest month (with the highest average wind speed) is December (28.2km/h).
The calmest month (with the lowest average wind speed) is July (19km/h).

Average humidity in May
Calais, France

Average humidity in May: 81%

The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is September (78%).

Average rainfall in May
Calais, France

Average rainfall in May: 25mm

The wettest month (with the highest rainfall) is October (55mm).
The driest month (with the least rainfall) is April (19mm).

Average rainfall days in May
Calais, France

Average rainfall days in May: 12.7 days

The month with the highest number of rainy days is November (19.5 days).
The month with the least rainy days is April (12.2 days).

Average snowfall in May
Calais, France

Average snowfall in May: 0mm

The month with the highest snowfall is January (19mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days in May
Calais, France

Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (2.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in May
Calais, France

Average sea temperature in May: 11.8°C

The best months for swimming (with the highest average sea temperature) are August and September (17.8°C).
The coldest month (with the lowest average sea temperature) is March (7.7°C).

Average daylight in May /
Average sunshine in May
Calais, France

Average daylight in May: 15h and 36min

The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 8h and 0min).

Average sunshine in May: 8h and 48min

The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is November (Average sunshine: 4h and 6min).

Average sunshine days in May
Calais, France

Average sunshine days in May: 14.7 days

The month with the most sunshine days is April (15.7 days).
The month with the least sunshine days is November (8.8 days).

Average UV index in May
Calais, France

Average UV index in May: 4

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January and February (UV index 2).

Average cloud cover in May
Calais, France

Average cloud cover in May: 42

The months with the most cloud cover are November and December (Cloud cover 59).
The months with the least cloud cover are April and August (Cloud cover 39).

Average visibility in May
Calais, France

Average visibility in May: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).