April weather forecastAlftanes, Iceland
April
Weather in April
The weather in April witnesses a momentous shift from icy to wet conditions in Alftanes, Iceland. A remarkable rise in the temperature from 2.3°C (36.1°F) to 4.9°C (40.8°F) hints at the arrival of spring. The once snow-rich landscapes begin to fade into wet terrains due to the diminishing snowfall, replaced by more rainfall. A noteworthy spike in daylight hours and reducing snowfall days indicate a transition into a different atmospheric phase.Temperature
The onset of April in Alftanes notes an average high-temperature of a still icy 4.9°C (40.8°F), subtly shifted from March's 2.3°C (36.1°F). Throughout April, a minimal difference from peak daytime temperatures is noted, marking a steady low-temperature average of 1.2°C (34.2°F).Humidity
In Alftanes, the average relative humidity in April is 78%.Rainfall
In Alftanes, Iceland, in April, it is raining for 15 days, with typically 36mm (1.42") of accumulated precipitation. In Alftanes, during the entire year, the rain falls for 166.2 days and collects up to 416mm (16.38") of precipitation.Snowfall
January through May, October through December are months with snowfall in Alftanes. In Alftanes, in April, during 5.5 snowfall days, 22mm (0.87") of snow is typically accumulated. In Alftanes, during the entire year, snow falls for 41.1 days and aggregates up to 309mm (12.17") of snow.Sea temperature
In April, the average sea temperature in Alftanes is 5.6°C (42.1°F).Note: Engaging in a swim in 5.6°C (42.1°F) can threaten life. Brief exposure to 13°C (55.4°F) waters is uneasy, and submersion below 10°C (50°F) can lead to cold shock and disrupted breathing patterns, varying by individual.
Daylight
In Alftanes, the average length of the day in April is 15h and 9min.On the first day of April, sunrise is at 06:43 and sunset at 20:20. On the last day of the month, sunrise is at 05:01 and sunset at 21:49 GMT.
Sunshine
In Alftanes, the average sunshine in April is 5.2h.UV index
In April, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the ordinary person.Note: In April, an average UV index of 2 transforms into the following instructions:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
Alftanes, Iceland
- Average high temperature in April: 4.9°C
The warmest month (with the highest average high temperature) is July (13.5°C).
The month with the lowest average high temperature is December (1.3°C).
- Average low temperature in April: 1.2°C
The month with the highest average low temperature is July (9.1°C).
The coldest month (with the lowest average low temperature) is December (-2.4°C).
Average pressure in April
Alftanes, Iceland
- Average pressure in April: 1008.9mbar
The month with the highest atmospheric pressure is June (1013.8mbar).
The month with the lowest atmospheric pressure is January (996.6mbar).
Average wind speed in April
Alftanes, Iceland
- Average wind speed in April: 22.1km/h
The windiest month (with the highest average wind speed) is February (24.9km/h).
The calmest months (with the lowest average wind speed) are June and July (14.9km/h).
Average humidity in April
Alftanes, Iceland
- Average humidity in April: 78%
The months with the highest relative humidity are January, February and September (82%).
The month with the lowest relative humidity is May (75%).
Average rainfall in April
Alftanes, Iceland
- Average rainfall in April: 36mm
The wettest month (with the highest rainfall) is January (47mm).
The driest months (with the least rainfall) are June and July (25mm).
Average rainfall days in April
Alftanes, Iceland
- Average rainfall days in April: 15 days
The month with the highest number of rainy days is September (17.8 days).
The month with the least rainy days is December (9.7 days).
Average snowfall in April
Alftanes, Iceland
- Average snowfall in April: 22mm
The month with the highest snowfall is March (100mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in April
Alftanes, Iceland
- Average snowfall days in April: 5.5 days
The month with the highest number of snowfall days is March (9.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in April
Alftanes, Iceland
- Average sea temperature in April: 5.6°C
The best months for swimming (with the highest average sea temperature) are July and August (11.3°C).
The coldest month (with the lowest average sea temperature) is March (4.3°C).
Average daylight in April /
Average sunshine in April
Alftanes, Iceland
- Average daylight in April: 15h and 6min
The month with the longest days is June (Average daylight: 20h and 48min).
The month with the shortest days is December (Average daylight: 4h and 24min).
- Average sunshine in April: 5h and 12min
The month with the most sunshine is August (Average sunshine: 7h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in April
Alftanes, Iceland
- Average sunshine days in April: 10.3 days
The month with the most sunshine days is December (14.1 days).
The month with the least sunshine days is September (8.8 days).
Average UV index in April
Alftanes, 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 and November (UV index 1).
Average cloud cover in April
Alftanes, Iceland
- Average cloud cover in April: 68
The months with the most cloud cover are March and April (Cloud cover 68).
The months with the least cloud cover are August and December (Cloud cover 60).
Average visibility in April
Alftanes, Iceland
- Average visibility in April: 9km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February, March, April, May, July, August, September, October, November and December (9km).
