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
The onset of May marks an increase in the average high-temperature, moving from a wintry 5.6°C (42.1°F) in April to a fresh 11.7°C (53.1°F). In Köyliö, the May nights cool down to an average low of 6.5°C (43.7°F).Humidity
The least humid month is May, with an average relative humidity of 71%.Rainfall
In Köyliö, during May, the rain falls for 11.9 days and regularly aggregates up to 28mm (1.1") of precipitation. In Köyliö, during the entire year, the rain falls for 135.2 days and collects up to 422mm (16.61") of precipitation.Snowfall
Months with snowfall in Köyliö are January through May, October through December. May is the last month it regularly snows. During 0.8 snowfall days, in May, Köyliö aggregates 6mm (0.24") of snow. In Köyliö, Finland, during the entire year, snow falls for 58.1 days and aggregates up to 382mm (15.04") of snow.Daylight
In Köyliö, Finland, the average length of the day in May is 17h and 29min.On the first day of May, sunrise is at 05:20 and sunset at 21:35. On the last day of the month, sunrise is at 04:08 and sunset at 22:48 EEST.
Sunshine
The average sunshine in May is 10.4h.UV index
In Köyliö, Finland, the average daily maximum UV index in May is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In May, a regular UV index of 3 translates into these guidelines:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May in Köyliö?
What is the least humid month in Köyliö?
What is the average humidity in May in Köyliö?
How much does it rain in Köyliö in May?
What is the last month it snows in Köyliö?
How many hours of daylight does Köyliö have in May?
When is the sunrise / sunset in May in Köyliö?
How many hours of sunshine does Köyliö have in May?
How high is the UV index in May in Köyliö?
Average temperature in May
Köyliö, Finland
- Average high temperature in May: 11.7°C
The warmest month (with the highest average high temperature) is July (19.7°C).
The months with the lowest average high temperature are January and February (-1.5°C).
- Average low temperature in May: 6.5°C
The month with the highest average low temperature is August (14°C).
The coldest month (with the lowest average low temperature) is February (-5°C).
Average pressure in May
Köyliö, Finland
- Average pressure in May: 1014.8mbar
The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1006.9mbar).
Average wind speed in May
Köyliö, Finland
- Average wind speed in May: 14.7km/h
The windiest month (with the highest average wind speed) is December (20.7km/h).
The calmest month (with the lowest average wind speed) is July (14.5km/h).
Average humidity in May
Köyliö, Finland
- Average humidity in May: 71%
The month with the highest relative humidity is February (91%).
The month with the lowest relative humidity is May (71%).
Average rainfall in May
Köyliö, Finland
- Average rainfall in May: 28mm
The wettest month (with the highest rainfall) is July (56mm).
The driest month (with the least rainfall) is April (21mm).
Average rainfall days in May
Köyliö, Finland
- Average rainfall days in May: 11.9 days
The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in May
Köyliö, Finland
- Average snowfall in May: 6mm
The month with the highest snowfall is March (88mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in May
Köyliö, Finland
- Average snowfall days in May: 0.8 days
The month with the highest number of snowfall days is March (13 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Köyliö, Finland
- Average daylight in May: 17h and 3min
The month with the longest days is June (Average daylight: 19h and 12min).
The month with the shortest days is December (Average daylight: 5h and 42min).
- Average sunshine in May: 10h and 2min
The month with the most sunshine is June (Average sunshine: 12h and 18min).
The months with the least sunshine are January and December (Average sunshine: 2h and 6min).
Average sunshine days in May
Köyliö, Finland
- Average sunshine days in May: 16.5 days
The month with the most sunshine days is June (16.8 days).
The month with the least sunshine days is December (10.7 days).
Average UV index in May
Köyliö, Finland
- Average UV index in May: 3
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 and December (UV index 1).
Average cloud cover in May
Köyliö, Finland
- Average cloud cover in May: 40
The month with the most cloud cover is January (Cloud cover 71).
The months with the least cloud cover are July and August (Cloud cover 36).
Average visibility in May
Köyliö, Finland
- Average visibility in May: 10km
The months with the highest visibility are May, June, July, August and September (10km).
The months with the lowest visibility are January, February and March (8km).
