Weather in May
Temperature
With the beginning of May, Mariehamn Airport's average high-temperature sees an increase, transitioning from a chilly 6°C (42.8°F) in April to a fresh 12°C (53.6°F). May nights in Mariehamn Airport are marked by an average temperature drop to a cold 4°C (39.2°F).Rainfall
In Mariehamn Airport, in May, it is raining for 10 days, with typically 27mm (1.06") of accumulated precipitation. Throughout the year, there are 176 rainfall days, and 508mm (20") of precipitation is accumulated.Sea temperature
In Mariehamn Airport, in May, the average water temperature is 5°C (41°F).Note: Dipping in 5°C (41°F) at temperatures less than 10°C (50°F) without proper gear can lead to pronounced cold shock and breathing difficulties.
Daylight
In May, the average length of the day in Mariehamn Airport is 17h and 14min.On the first day of May, sunrise is at 05:35 and sunset at 21:39. On the last day of the month, sunrise is at 04:28 and sunset at 22:47 EEST.
Sunshine
In May, the average sunshine is 8h.UV index
In May, the average daily maximum UV index in Mariehamn Airport is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 4 during May leads to these advisories:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Frequently asked questions
What are May temperatures in Mariehamn Airport?
How much does it rain in Mariehamn Airport in May?
How cold is the water in May in Mariehamn Airport?
What is the average length of the day in May in Mariehamn Airport?
When are sunrise and sunset in May in Mariehamn Airport?
How many hours of sunshine does Mariehamn Airport have in May?
What is the UV index intensity in May in Mariehamn Airport?
Average temperature in May
Mariehamn Airport, Finland
- Average high temperature in May: 12°C
The warmest month (with the highest average high temperature) is July (19°C).
The month with the lowest average high temperature is February (-2°C).
- Average low temperature in May: 4°C
The month with the highest average low temperature is July (12°C).
The coldest month (with the lowest average low temperature) is February (-8°C).
Average rainfall in May
Mariehamn Airport, Finland
- Average rainfall in May: 27mm
The wettest month (with the highest rainfall) is August (64mm).
The driest months (with the least rainfall) are February and March (25mm).
Average rainfall days in May
Mariehamn Airport, Finland
- Average rainfall days in May: 10 days
The month with the highest number of rainy days is January (20 days).
The months with the least rainy days are May and June (10 days).
Average sea temperature in May
Mariehamn Airport, Finland
- Average sea temperature in May: 5°C
The best month for swimming (with the highest average sea temperature) is August (16°C).
The coldest months (with the lowest average sea temperature) are February and March (1°C).
Average daylight in May /
Average sunshine in May
Mariehamn Airport, Finland
- Average daylight in May: 17h and 1min
The month with the longest days is June (Average daylight: 18h and 48min).
The month with the shortest days is December (Average daylight: 6h and 0min).
- Average sunshine in May: 8h
The month with the most sunshine is June (Average sunshine: 9h).
The months with the least sunshine are January, February, November and December (Average sunshine: 1h).
Average UV index in May
Mariehamn Airport, Finland
- 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, November and December (UV index 0).
Mariehamn Airport, Finland
Weather forecast for your location
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