1. WeatherSpark.com
  2. Iceland
  3. Capital Region
  4. Reykjavík

April Weather in Reykjavík Iceland

Daily high temperatures increase by 5°F, from 40°F to 45°F, rarely falling below 32°F or exceeding 51°F.

Daily low temperatures increase by 5°F, from 31°F to 36°F, rarely falling below 22°F or exceeding 43°F.

For reference, on July 30, the hottest day of the year, temperatures in Reykjavík typically range from 49°F to 57°F, while on January 24, the coldest day of the year, they range from 28°F to 36°F.

Average High and Low Temperature in April in Reykjavík

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on April. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in April in Reykjavík

Average Hourly Temperature in April in ReykjavíkApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMMarMayNowNowfreezingvery coldcoldcold
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Sand Point, Alaska, United States (3,898 miles away) and Kodiak, Alaska, United States (3,624 miles) are the far-away foreign places with temperatures most similar to Reykjavík (view comparison).

Map
Marker
© OpenStreetMap contributors

Compare Reykjavík to another city:

Map

The month of April in Reykjavík experiences decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 67% to 59%.

The clearest day of the month is April 30, with clear, mostly clear, or partly cloudy conditions 41% of the time.

For reference, on January 21, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 78%, while on May 20, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 43%.

Cloud Cover Categories in April in Reykjavík

Cloud Cover Categories in April in ReykjavíkApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MarMayApr 133%Apr 133%Apr 3041%Apr 3041%Apr 1136%Apr 1136%Apr 2139%Apr 2139%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Reykjavík, the chance of a wet day over the course of April is rapidly decreasing, starting the month at 44% and ending it at 36%.

For reference, the year's highest daily chance of a wet day is 55% on February 26, and its lowest chance is 29% on July 6.

Over the course of April in Reykjavík, the chance of a day with only rain remains an essentially constant 35% throughout, the chance of a day with mixed snow and rain decreases from 7% to 2%, and the chance of a day with only snow decreases from 3% to 0%.

Probability of Precipitation in April in Reykjavík

Probability of Precipitation in April in ReykjavíkApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%40%40%45%45%50%50%55%55%60%60%MarMayApr 144%Apr 144%Apr 3036%Apr 3036%Apr 1142%Apr 1142%Apr 2141%Apr 2141%NowNowsnowmixedrain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during April in Reykjavík is decreasing, starting the month at 3.3 inches, when it rarely exceeds 5.3 inches or falls below 1.5 inches, and ending the month at 2.7 inches, when it rarely exceeds 4.7 inches or falls below 0.9 inches.

Average Monthly Rainfall in April in Reykjavík

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day snowfall during April in Reykjavík is rapidly decreasing, starting the month at 4.0 inches, when it rarely exceeds 9.0 inches or falls below 0.3 inches, and ending the month at 0.7 inches, when it rarely exceeds 2.3 inches or falls below -0.0 inches.

Average Monthly Snowfall in April in Reykjavík

The average snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.

Over the course of April in Reykjavík, the length of the day is very rapidly increasing. From the start to the end of the month, the length of the day increases by 3 hours, 12 minutes, implying an average daily increase of 6 minutes, 37 seconds, and weekly increase of 46 minutes, 18 seconds.

The shortest day of the month is April 1, with 13 hours, 36 minutes of daylight and the longest day is April 30, with 16 hours, 48 minutes of daylight.

Hours of Daylight and Twilight in April in Reykjavík

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The latest sunrise of the month in Reykjavík is 6:44 AM on April 1 and the earliest sunrise is 1 hour, 42 minutes earlier at 5:01 AM on April 30.

The earliest sunset is 8:20 PM on April 1 and the latest sunset is 1 hour, 30 minutes later at 9:49 PM on April 30.

Daylight saving time is not observed in Reykjavík during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 2:55 AM and sets 21 hours, 8 minutes later, at 12:03 AM, while on December 21, the shortest day of the year, it rises at 11:22 AM and sets 4 hours, 7 minutes later, at 3:29 PM.

Sunrise & Sunset with Twilight in April in Reykjavík

Sunrise & Sunset with Twilight in April in ReykjavíkApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMMarMay5:01 AM5:01 AMApr 309:49 PMApr 309:49 PM6:44 AM6:44 AMApr 18:20 PMApr 18:20 PM6:08 AM6:08 AMApr 118:50 PMApr 118:50 PMSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of April. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in April in Reykjavík

Solar Elevation and Azimuth in April in ReykjavíkApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMMarMay001010202030304000010102020303040NowNow
northeastsouthwest
Solar elevation and azimuth over the course of April 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for April 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in April in Reykjavík

Moon Rise, Set & Phases in April in ReykjavíkApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMMarMayMar 109:01 AMMar 109:01 AMMar 257:01 AMMar 257:01 AMApr 86:22 PMApr 86:22 PMApr 2311:50 PMApr 2311:50 PMMay 83:23 AMMay 83:23 AMMay 231:54 PMMay 231:54 PM8:30 AM8:30 AM7:41 PM7:41 PM7:02 PM7:02 PM7:25 AM7:25 AM6:27 AM6:27 AM8:46 PM8:46 PM9:23 PM9:23 PM5:11 AM5:11 AM4:06 AM4:06 AM10:38 PM10:38 PM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.
Apr 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
59%6:53 AMS238,327 mi
2
50%7:55 AMS234,986 mi
3
37%7:59 AMSSE9:55 AMSSW-8:57 AMS231,598 mi
4
25%7:18 AMSSE12:35 PMSW-9:56 AMS228,413 mi
5
16%7:01 AMSE2:47 PMSW-10:53 AMS225,729 mi
6
8%6:48 AMESE4:49 PMWSW-11:46 AMS223,844 mi
7
2%6:37 AME6:47 PMW-12:37 PMS223,007 mi
8
0%6:27 AME8:46 PMWNW-1:27 PMS223,361 mi
9
1%6:16 AMENE10:50 PMNW-2:18 PMS224,915 mi
10
5%6:02 AMNE--3:10 PMS227,531 mi
11
12%-1:06 AMNNW5:43 AMNNE4:05 PMS230,948 mi
12
20%5:02 PMS234,831 mi
13
30%5:58 PMS238,823 mi
14
40%6:53 PMS242,597 mi
15
50%7:45 PMS245,896 mi
16
60%-6:53 AMNNW9:45 AMNNE8:33 PMS248,546 mi
17
70%-6:26 AMNW11:50 AMNE9:18 PMS250,456 mi
18
78%-6:11 AMNW1:36 PMNE9:59 PMS251,607 mi
19
86%-5:59 AMWNW3:12 PMENE10:39 PMS252,036 mi
20
92%-5:50 AMWNW4:43 PME11:17 PMS251,820 mi
21
96%-5:40 AMW6:13 PME11:56 PMS251,059 mi
22
98%-5:31 AMWSW7:45 PMESE--
23
100%-5:22 AMWSW9:23 PMESE12:35 AMS249,858 mi
24
100%-5:11 AMSW11:10 PMSE1:18 AMS248,314 mi
25
99%-4:57 AMSW-2:03 AMS246,507 mi
26
96%1:15 AMSSE4:32 AMSSW-2:54 AMS244,494 mi
27
90%3:48 AMS242,311 mi
28
83%4:47 AMS239,984 mi
29
74%5:49 AMS237,539 mi
30
63%6:50 AMS235,023 mi

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Reykjavík is essentially constant during April, remaining around 0% throughout.

Humidity Comfort Levels in April in Reykjavík

Humidity Comfort Levels in April in ReykjavíkApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%MarMayApr 160%Apr 160%Apr 10%Apr 10%Apr 300%Apr 300%NowNowdrydry
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Reykjavík is decreasing during April, decreasing from 13.4 miles per hour to 11.5 miles per hour over the course of the month.

For reference, on January 7, the windiest day of the year, the daily average wind speed is 16.1 miles per hour, while on July 20, the calmest day of the year, the daily average wind speed is 7.9 miles per hour.

Average Wind Speed in April in Reykjavík

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The wind direction in Reykjavík during April is predominantly out of the east from April 1 to April 16 and from April 27 to April 30 and the south from April 16 to April 27.

Wind Direction in April in Reykjavík

Wind Direction in April in ReykjavíkSESESApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%MarMayNowNowwestsoutheastnorth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Reykjavík is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Reykjavík is gradually increasing during April, rising by 2°F, from 41°F to 43°F, over the course of the month.

Average Water Temperature in April in Reykjavík

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Reykjavík typically lasts for 4.9 months (148 days), from around May 9 to around October 5, rarely starting before April 21 or after May 29, and rarely ending before September 15 or after October 23.

The month of April in Reykjavík is more likely than not fully outside of the growing season, with the chance that a given day is in the growing season rapidly increasing from 0% to 26% over the course of the month.

Time Spent in Various Temperature Bands and the Growing Season in April in Reykjavík

Time Spent in Various Temperature Bands and the Growing Season in April in ReykjavíkApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MarMayApr 10%Apr 10%Apr 3026%Apr 3026%Apr 111%Apr 111%Apr 2111%Apr 2111%50%May 950%May 990%May 2990%May 29NowNowfreezingvery coldcoldcool
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Reykjavík are essentially constant during April, remaining within 1°F of 1°F throughout.

Growing Degree Days in April in Reykjavík

Growing Degree Days in April in ReykjavíkApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300.0°F0.0°F0.5°F0.5°F1.0°F1.0°F1.5°F1.5°F2.0°F2.0°F2.5°F2.5°F3.0°F3.0°F3.5°F3.5°FMarMayApr 10°FApr 10°FApr 301°FApr 301°FApr 110°FApr 110°FApr 210°FApr 210°FNowNow
The average growing degree days accumulated over the course of April, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Reykjavík is rapidly increasing during April, rising by 1.6 kWh, from 2.3 kWh to 3.9 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in April in Reykjavík

Average Daily Incident Shortwave Solar Energy in April in ReykjavíkApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWhMarMayApr 12.3 kWhApr 12.3 kWhApr 303.9 kWhApr 303.9 kWhApr 112.9 kWhApr 112.9 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of Reykjavík are 64.135 deg latitude, -21.895 deg longitude, and 125 ft elevation.

The topography within 2 miles of Reykjavík contains only modest variations in elevation, with a maximum elevation change of 203 feet and an average elevation above sea level of 57 feet. Within 10 miles contains only modest variations in elevation (2,851 feet). Within 50 miles contains large variations in elevation (4,426 feet).

The area within 2 miles of Reykjavík is covered by artificial surfaces (83%), within 10 miles by water (39%) and shrubs (30%), and within 50 miles by water (53%) and shrubs (23%).

This report illustrates the typical weather in Reykjavík, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Reykjavík.

For each station, the records are corrected for the elevation difference between that station and Reykjavík according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Reykjavík is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Reykjavík and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Reykjavík and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

Please review our full terms contained on our Terms of Service page.