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
Weather in May
Temperature
At the start of May, Altena's average high-temperature reaches a still refreshing 16.7°C (62.1°F), subtly different from the preceding month. Altena in May anticipates an average nighttime temperature of 6.9°C (44.4°F).Humidity
The average relative humidity in May in Altena, Germany, is 79%.Rainfall
In May, in Altena, the rain falls for 16.9 days. Throughout May, 45mm (1.77") of precipitation is accumulated. In Altena, during the entire year, the rain falls for 173.8 days and collects up to 605mm (23.82") of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows in Altena. During 0.5 snowfall days, in May, Altena aggregates 7mm (0.28") of snow. Throughout the year, there are 43.4 snowfall days, and 536mm (21.1") of snow is accumulated.Daylight
In Altena, the average length of the day in May is 15h and 37min.On the first day of May in Altena, sunrise is at 06:00 and sunset at 20:52. On the last day of the month, sunrise is at 05:18 and sunset at 21:35 CEST.
Sunshine
In Altena, the average sunshine in May is 8.5h.UV index
In Altena, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In May, the maximum UV index of 4 suggests this advice:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Altena in May?
What is the average humidity in May in Altena?
How much does it rain in Altena in May?
What is the last month it snows in Altena?
What is the average length of the day in May in Altena?
When is the sunrise / sunset in May in Altena?
How many hours of sunshine does Altena have in May?
What is the UV index reading in May in Altena?
Average temperature in May
Altena, Germany
- Average high temperature in May: 16.7°C
The warmest month (with the highest average high temperature) is August (22.4°C).
The month with the lowest average high temperature is January (3.2°C).
- Average low temperature in May: 6.9°C
The month with the highest average low temperature is August (12.6°C).
The coldest month (with the lowest average low temperature) is January (-0.9°C).
Average pressure in May
Altena, Germany
- Average pressure in May: 1016.2mbar
The month with the highest atmospheric pressure is September (1017.7mbar).
The month with the lowest atmospheric pressure is November (1013.4mbar).
Average wind speed in May
Altena, Germany
- Average wind speed in May: 10.4km/h
The windiest month (with the highest average wind speed) is February (14km/h).
The calmest month (with the lowest average wind speed) is August (9.4km/h).
Average humidity in May
Altena, Germany
- Average humidity in May: 79%
The month with the highest relative humidity is December (91%).
The months with the lowest relative humidity are April and August (76%).
Average rainfall in May
Altena, Germany
- Average rainfall in May: 45mm
The wettest month (with the highest rainfall) is December (73mm).
The driest month (with the least rainfall) is April (29mm).
Average rainfall days in May
Altena, Germany
- Average rainfall days in May: 16.9 days
The month with the highest number of rainy days is July (18.7 days).
The month with the least rainy days is February (9.4 days).
Average snowfall in May
Altena, Germany
- Average snowfall in May: 7mm
The month with the highest snowfall is January (143mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in May
Altena, Germany
- Average snowfall days in May: 0.5 days
The month with the highest number of snowfall days is January (11.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Altena, Germany
- Average daylight in May: 15h and 4min
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 3min
The month with the most sunshine is August (Average sunshine: 9h and 30min).
The month with the least sunshine is December (Average sunshine: 3h and 12min).
Average sunshine days in May
Altena, Germany
- Average sunshine days in May: 11.4 days
The month with the most sunshine days is April (14.4 days).
The month with the least sunshine days is December (9.5 days).
Average UV index in May
Altena, Germany
- 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
Altena, Germany
- Average cloud cover in May: 47
The month with the most cloud cover is December (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 39).
Average visibility in May
Altena, Germany
- Average visibility in May: 8km
The months with the highest visibility are April, June and August (9km).
The months with the lowest visibility are January and December (7km).
Altena, Germany
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