Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
May
Weather in May
Temperature
May denotes a minimal variation in the average high-temperature to a still refreshing 17.3°C (63.1°F) from April's 14.6°C (58.3°F). Throughout the month of May, Heelsum witnesses an average temperature of 8.5°C (47.3°F).Humidity
In Heelsum, the average relative humidity in May is 77%.Rainfall
In May, the rain falls for 18.1 days. Throughout May, 40mm (1.57") of precipitation is accumulated. Throughout the year, there are 193.3 rainfall days, and 523mm (20.59") of precipitation is accumulated.Snowfall
May through October are months without snowfall in Heelsum.Daylight
In Heelsum, the average length of the day in May is 15h and 42min.On the first day of May, sunrise is at 06:05 and sunset at 21:02. On the last day of the month, sunrise is at 05:23 and sunset at 21:46 CEST.
Sunshine
In May, the average sunshine is 8.1h.UV index
In Heelsum, the average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In May, the maximum UV index of 4 translates into these guidelines:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature in Heelsum?
What is the average humidity in May in Heelsum?
How much does it rain in Heelsum in May?
When it does not snow in Heelsum?
Does it snow in Heelsum in May?
What is the average length of the day in May in Heelsum?
When are sunrise and sunset in May in Heelsum?
How many hours of sunshine does Heelsum have in May?
What is the UV index intensity in May in Heelsum?
Average temperature in May
Heelsum, Netherlands
- Average high temperature in May: 17.3°C
The warmest months (with the highest average high temperature) are July and August (22.3°C).
The month with the lowest average high temperature is January (4.6°C).
- Average low temperature in May: 8.5°C
The month with the highest average low temperature is August (13.8°C).
The coldest months (with the lowest average low temperature) are January and February (1°C).
Average pressure in May
Heelsum, Netherlands
- Average pressure in May: 1016.5mbar
The month with the highest atmospheric pressure is September (1017.1mbar).
The month with the lowest atmospheric pressure is November (1011.8mbar).
Average wind speed in May
Heelsum, Netherlands
- Average wind speed in May: 12.9km/h
The windiest month (with the highest average wind speed) is December (17.7km/h).
The calmest month (with the lowest average wind speed) is August (11.7km/h).
Average humidity in May
Heelsum, Netherlands
- Average humidity in May: 77%
The month with the highest relative humidity is December (89%).
The month with the lowest relative humidity is April (75%).
Average rainfall in May
Heelsum, Netherlands
- Average rainfall in May: 40mm
The wettest month (with the highest rainfall) is June (53mm).
The driest month (with the least rainfall) is April (27mm).
Average rainfall days in May
Heelsum, Netherlands
- Average rainfall days in May: 18.1 days
The month with the highest number of rainy days is July (18.7 days).
The month with the least rainy days is September (13.5 days).
Average snowfall in May
Heelsum, Netherlands
- Average snowfall in May: 0mm
The month with the highest snowfall is February (39mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in May
Heelsum, Netherlands
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Heelsum, Netherlands
- Average daylight in May: 15h and 4min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 48min).
- Average sunshine in May: 8h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 0min).
The month with the least sunshine is December (Average sunshine: 3h and 24min).
Average sunshine days in May
Heelsum, Netherlands
- Average sunshine days in May: 10.3 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is December (7.9 days).
Average UV index in May
Heelsum, Netherlands
- 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, February, November and December (UV index 2).
Average cloud cover in May
Heelsum, Netherlands
- Average cloud cover in May: 46
The month with the most cloud cover is December (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 43).
Average visibility in May
Heelsum, Netherlands
- Average visibility in May: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, October and November (9km).
The months with the lowest visibility are September and December (8km).
