Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average snowfall in April
- Average snowfall days in April
- Average sea temperature in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
As March transitions into April, Grindavik records an average high-temperature of a still wintry 5.7°C (42.3°F), showing a gentle shift from the preceding month. Nighttime, during April, brings an average low of 3°C (37.4°F), a modest reduction from the day's peak.Humidity
In Grindavik, the average relative humidity in April is 77%.Rainfall
In Grindavik, Iceland, in April, it is raining for 19.3 days, with typically 70mm (2.76") of accumulated precipitation. Throughout the year, there are 193.9 rainfall days, and 833mm (32.8") of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Grindavik, during April, snow falls for 3.8 days and regularly aggregates up to 36mm (1.42") of snow. In Grindavik, during the entire year, snow falls for 33.4 days and aggregates up to 297mm (11.69") of snow.Sea temperature
In Grindavik, the average seawater temperature in April is 6.5°C (43.7°F).Note: Taking a dip in 6.5°C (43.7°F) can be perilous. Submersion in temperatures under 10°C (50°F) triggers severe cold shock accompanied by hyperventilation.
Daylight
The average length of the day in April in Grindavik, Iceland, is 15h and 7min.On the first day of the month, sunrise is at 06:45 and sunset at 20:21. On the last day of April, sunrise is at 05:04 and sunset at 21:49 GMT.
Sunshine
In Grindavik, the average sunshine in April is 5.4h.UV index
The months with the lowest UV index are January through May, October through December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In April, a daily UV index of 2 turns into the following recommendations:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in Grindavik in April?
What is the average humidity in April in Grindavik?
How much does it rain in Grindavik in April?
How much does it snow in Grindavik in April?
What is the sea water temperature in April in Grindavik?
What is the average length of the day in April in Grindavik?
When is the sunrise / sunset in April in Grindavik?
How long on average sun shines in April in Grindavik?
What is the month with the lowest UV index in Grindavik?
How high is the UV index in April in Grindavik?
Average temperature in April
Grindavik, Iceland
- Average high temperature in April: 5.7°C
The warmest months (with the highest average high temperature) are July and August (12.2°C).
The months with the lowest average high temperature are February, March and December (4.2°C).
- Average low temperature in April: 3°C
The month with the highest average low temperature is July (9.9°C).
The coldest months (with the lowest average low temperature) are March and December (1.3°C).
Average pressure in April
Grindavik, Iceland
- Average pressure in April: 1008.5mbar
The month with the highest atmospheric pressure is June (1013.7mbar).
The month with the lowest atmospheric pressure is January (996.1mbar).
Average wind speed in April
Grindavik, Iceland
- Average wind speed in April: 29.7km/h
The windiest month (with the highest average wind speed) is February (35km/h).
The calmest month (with the lowest average wind speed) is June (20.1km/h).
Average humidity in April
Grindavik, Iceland
- Average humidity in April: 77%
The months with the highest relative humidity are July and August (81%).
The month with the lowest relative humidity is December (74%).
Average rainfall in April
Grindavik, Iceland
- Average rainfall in April: 70mm
The wettest month (with the highest rainfall) is January (99mm).
The driest month (with the least rainfall) is June (35mm).
Average rainfall days in April
Grindavik, Iceland
- Average rainfall days in April: 19.3 days
The month with the highest number of rainy days is September (19.9 days).
The month with the least rainy days is June (12.5 days).
Average snowfall in April
Grindavik, Iceland
- Average snowfall in April: 36mm
The month with the highest snowfall is March (75mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in April
Grindavik, Iceland
- Average snowfall days in April: 3.8 days
The month with the highest number of snowfall days is March (8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in April
Grindavik, Iceland
- Average sea temperature in April: 6.5°C
The best month for swimming (with the highest average sea temperature) is July (11.7°C).
The coldest month (with the lowest average sea temperature) is March (5.8°C).
Average daylight in April /
Average sunshine in April
Grindavik, Iceland
- Average daylight in April: 15h and 1min
The month with the longest days is June (Average daylight: 20h and 36min).
The month with the shortest days is December (Average daylight: 4h and 30min).
- Average sunshine in April: 5h and 2min
The month with the most sunshine is August (Average sunshine: 7h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in April
Grindavik, Iceland
- Average sunshine days in April: 7.1 days
The month with the most sunshine days is June (15 days).
The months with the least sunshine days are March and April (7.1 days).
Average UV index in April
Grindavik, Iceland
- Average UV index in April: 2
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, February, March, April, May, October, November and December (UV index 2).
Average cloud cover in April
Grindavik, Iceland
- Average cloud cover in April: 68
The month with the most cloud cover is March (Cloud cover 69).
The months with the least cloud cover are May, July and August (Cloud cover 60).
Average visibility in April
Grindavik, Iceland
- Average visibility in April: 9km
The months with the highest visibility are June and August (10km).
The months with the lowest visibility are January, February, March, April, May, July, September, October, November and December (9km).
Grindavik, Iceland
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