Country Overview For Iceland
The climate in Iceland is typically temperate; moderated by North Atlantic Current; mild, windy winters; damp, cool summers. The terrain: mostly plateau interspersed with mountain peaks, icefields; coast deeply indented by bays and fiords. For Reykjavik in January the daily average maximum temperatures is 3°C with the average minimum -2°C, while in June the average maximum is 13°C with a minimum of 7°C. The wettest month for Reykjavik is January with an average of 42.1mm of precipitation falling while the driest month is June with 15.6mm falling.
HISTORICAL MONTHLY AVERAGES FOR APRIL
The information presented below gives detailed historical monthly average weather conditions along with exceptional weather occurrences. To maintain relevance to current weather trends the displayed information has been calculated using data collected over the past two decades. The climate profile is taken from closest available data source to Hveravellir.
Throughout the month of April daytime temperatures will generally reach highs of around -2°C that's about 29°F. At night the average minimum temperature drops down to around -6°C, that's 20°F.
In recent times the highest recorded temperature in April has been 10°C that's 50°F, with the lowest recorded temperature -22°C, about -8°F.
The average daily relative humidity for April is around 84%.
The Heat Index is a measure of how hot it feels when relative humidity is added to actual air temperature. From this a comfort level is calculated providing categories on how heat conditions might adversely affect someone.
Comfort Levels: Given average maximum temperatures and humidity levels generally you should not anticipate any discomfort from heat (see heat index for more information).
The average monthly amount of precipitation has been recorded at around 0 mm, that's 0 inches. Throughout the month you can expect to see rain or drizzle falling on 8 days of the month, with snow falling on 18 days.
Estimated Hours of Sunshine per Day
We calculate sunshine hours per day using our past forecast data. For April expect the sun to shine for an average of 4 hours per day. This represents the average number of hours in the daytime that the sun is visible and not obscured by cloud e.g. the average number of hours the sun is actually out and shining. Note we calculate hours of sunshine per day using our past forecast data, not observation data, thus it is an estimate and not actual.
The average daily wind speed in April has been around 31 km/h, that’s the equivalent to about 19 mph, or 17 knots. In recent years the maximum sustained wind speed has reached 113 km/h, that’s the equivalent of around 70 mph, or 61 knots.
On average the month of April is affected by foggy conditions on 6 days.
SWIMMING AND WATER TEMPERATURE
The temperature of water an individual will feel comfortable in is very much personal preference. What feels unbearably cold to one person for a swim might be fine for another. We have created our own Swimming Water Temperature Index offering a guide to water temperature and comfort levels for swimming;
In April, for the nearest coastal location, the temperature of the sea averages around 8°C, that's 46° Fahrenheit. Our index indicates for swimming this is considered very cold and even the most hardy among us would be foolhardy to venture in for a swim and risk hypothermia if exposed for any more than a few minutes.
YEARLY TRENDS: WEATHER AVERAGES & EXTREMES
The following charts show yearly weather trends with information on monthly weather averages and extremes.
The chart below plots the average high and low temperature for each month of the year. It also shows the maximum and minimum recorded temperatures.
The chart below plots the average monthly precipitation amount.
The chart below plots the average number of days in any month that you can expect to see rain falling.
The chart below plots the average number of days in any month that you can expect to see snow falling.
The chart below plots the average daily wind speed you can expect for any month. It also shows the maximum recorded sustained wind speed for each month.