May weather forecastHerstal, Belgium
May
Weather in May
May signifies the onset of the pre-summer season in Herstal with temperatures continuing to rise steadily. The warmer weather is clear with no snowfall compared to the marginal 1mm (0.04") seen in April. Daylight hours extend, creating longer days and adding to the growing sentiment of the imminent summer. The weather encourages outdoor activities in parks and cafes, enjoying the pleasing temperatures before the hot summer days. May's natural beauty juxtaposed with Herstal's urban spaces creates a picture of captivating harmony.Temperature
Herstal records an average high-temperature of a still refreshing 16.7°C (62.1°F) as May arrives, nearly mirroring the previous month's climate. During May, Herstal records an average temperature of 7.3°C (45.1°F) at night.Humidity
The average relative humidity in May is 80%.Rainfall
In Herstal, in May, during 18.3 rainfall days, 46mm (1.81") of precipitation is typically accumulated. Throughout the year, in Herstal, there are 193.2 rainfall days, and 544mm (21.42") of precipitation is accumulated.Snowfall
In Herstal, snow does not fall in May through October.Daylight
In May, the average length of the day is 15h and 31min.On the first day of May, sunrise is at 06:10 and sunset at 20:58. On the last day of the month, sunrise is at 05:30 and sunset at 21:40 CEST.
Sunshine
In Herstal, the average sunshine in May is 8.4h.UV index
The average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In May, a daily maximum UV index of 4 leads to the following instructions:
Guard yourself - Avoiding sunburn is suggested. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Herstal, Belgium
- Average high temperature in May: 16.7°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 (4.1°C).
- Average low temperature in May: 7.3°C
The month with the highest average low temperature is August (12.8°C).
The coldest month (with the lowest average low temperature) is January (-0.3°C).
Average pressure in May
Herstal, Belgium
- Average pressure in May: 1016.2mbar
The month with the highest atmospheric pressure is September (1017.5mbar).
The month with the lowest atmospheric pressure is November (1013.1mbar).
Average wind speed in May
Herstal, Belgium
- Average wind speed in May: 11.4km/h
The windiest month (with the highest average wind speed) is December (17km/h).
The calmest month (with the lowest average wind speed) is August (10.5km/h).
Average humidity in May
Herstal, Belgium
- Average humidity in May: 80%
The month with the highest relative humidity is December (89%).
The months with the lowest relative humidity are April and August (77%).
Average rainfall in May
Herstal, Belgium
- Average rainfall in May: 46mm
The wettest month (with the highest rainfall) is December (58mm).
The driest month (with the least rainfall) is April (26mm).
Average rainfall days in May
Herstal, Belgium
- Average rainfall days in May: 18.3 days
The month with the highest number of rainy days is July (19.4 days).
The month with the least rainy days is February (12.7 days).
Average snowfall in May
Herstal, Belgium
- Average snowfall in May: 0mm
The month with the highest snowfall is January (50mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in May
Herstal, Belgium
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (5.8 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
Herstal, Belgium
- Average daylight in May: 15h and 30min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 6min).
- Average sunshine in May: 8h and 24min
The months with the most sunshine are July and August (Average sunshine: 9h and 12min).
The month with the least sunshine is December (Average sunshine: 3h and 36min).
Average sunshine days in May
Herstal, Belgium
- Average sunshine days in May: 10.3 days
The month with the most sunshine days is October (14.7 days).
The month with the least sunshine days is June (8.3 days).
Average UV index in May
Herstal, Belgium
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in May
Herstal, Belgium
- Average cloud cover in May: 46
The month with the most cloud cover is December (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 40).
Average visibility in May
Herstal, Belgium
- Average visibility in May: 9km
The months with the highest visibility are March, April, May, June, July and August (9km).
The months with the lowest visibility are January, February, September, October, November and December (8km).
