Weather in April
Temperature
The shift into April in Helsinki, Finland, brings an increase in the average high-temperature, moving from a cold 1.6°C (34.9°F) in March to a chilly 7.6°C (45.7°F). Helsinki experiences an average low-temperature reading of 0.8°C (33.4°F) throughout April.Rainfall
The month with the least rainfall is April, when the rain falls for 11 days and typically collects 32mm (1.26") of precipitation.Snowfall
In Helsinki, snow does not fall in April through October.Sea temperature
In Helsinki, in April, the average water temperature is 2°C (35.6°F).Note: In swimming, this scenario poses immediate life-threatening danger. Breathing control is totally lost and logical thinking nearly impossible. Wearing a specialized swimsuit is critical to limit thermal loss.
Daylight
The average length of the day in April is 14h and 38min.On the first day of April, sunrise is at 06:43 and sunset at 20:04. On the last day of the month, sunrise is at 05:17 and sunset at 21:16 EEST.
Sunshine
The average sunshine in April in Helsinki is 6.5h.UV index
In Helsinki, the average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 3 in April translates into this advice:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
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Average temperature in April
Helsinki, Finland
- Average high temperature in April: 7.6°C
The warmest month (with the highest average high temperature) is July (21.5°C).
The month with the lowest average high temperature is February (-1.9°C).
- Average low temperature in April: 0.8°C
The month with the highest average low temperature is July (14.2°C).
The coldest month (with the lowest average low temperature) is February (-7.4°C).
Average rainfall in April
Helsinki, Finland
- Average rainfall in April: 32mm
The wettest month (with the highest rainfall) is August (80mm).
The driest month (with the least rainfall) is April (32mm).
Average rainfall days in April
Helsinki, Finland
- Average rainfall days in April: 11 days
The month with the highest number of rainy days is December (20 days).
The months with the least rainy days are April and May (11 days).
Average snowfall in April
Helsinki, Finland
- Average snowfall in April: 0mm
The month with the highest snowfall is February (230mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average sea temperature in April
Helsinki, Finland
- Average sea temperature in April: 2°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 April /
Average sunshine in April
Helsinki, Finland
- Average daylight in April: 14h and 4min
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 April: 6h and 3min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is December (Average sunshine: 0h and 54min).
Average UV index in April
Helsinki, Finland
- Average UV index in April: 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, November and December (UV index 0).
Helsinki, Finland
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