April Weather at Iqaluit Airport CanadaDaily high temperatures increase by 17°F, from 7°F to 23°F, rarely falling below -7°F or exceeding 34°F. Daily low temperatures increase by 19°F, from -7°F to 12°F, rarely falling below -21°F or exceeding 27°F. For reference, on July 23, the hottest day of the year, temperatures at Iqaluit Airport typically range from 42°F to 54°F, while on February 7, the coldest day of the year, they range from -22°F to -10°F. 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. Kharp, Russia (3,138 miles away) and Kayyerkan, Russia (3,170 miles) are the far-away foreign places with temperatures most similar to Iqaluit Airport (view comparison). CloudsThe month of April at Iqaluit Airport experiences gradually 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 December 23, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 76%, while on May 24, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 47%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Iqaluit Airport, the chance of a wet day over the course of April is rapidly increasing, starting the month at 10% and ending it at 16%. For reference, the year's highest daily chance of a wet day is 30% on August 13, and its lowest chance is 5% on January 3. Over the course of April at Iqaluit Airport, the chance of a day with only rain remains an essentially constant 1% throughout, the chance of a day with mixed snow and rain increases from 0% to 2%, and the chance of a day with only snow increases from 10% to 13%. RainfallTo 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 at Iqaluit Airport is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.4 inches. SnowfallAs 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 at Iqaluit Airport is increasing, starting the month at 4.8 inches, when it rarely exceeds 9.7 inches or falls below 0.2 inches, and ending the month at 7.4 inches, when it rarely exceeds 16.1 inches or falls below 1.3 inches. SunOver the course of April at Iqaluit Airport, 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, 8 minutes, implying an average daily increase of 6 minutes, 29 seconds, and weekly increase of 45 minutes, 22 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, 44 minutes of daylight. The latest sunrise of the month at Iqaluit Airport is 5:50 AM on April 1 and the earliest sunrise is 1 hour, 40 minutes earlier at 4:10 AM on April 30. The earliest sunset is 7:26 PM on April 1 and the latest sunset is 1 hour, 28 minutes later at 8:54 PM on April 30. Daylight saving time is observed at Iqaluit Airport during 2024, but it neither starts nor ends during April, so the entire month is in standard time. For reference, on June 20, the longest day of the year, the Sun rises at 2:10 AM and sets 20 hours, 50 minutes later, at 11:00 PM, while on December 21, the shortest day of the year, it rises at 9:22 AM and sets 4 hours, 20 minutes later, at 1:42 PM. 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. MoonThe 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.
HumidityWe 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 at Iqaluit Airport is essentially constant during April, remaining around 0% throughout. WindThis 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 at Iqaluit Airport is essentially constant during April, remaining within 0.2 miles per hour of 11.3 miles per hour throughout. For reference, on April 29, the windiest day of the year, the daily average wind speed is 11.6 miles per hour, while on July 12, the calmest day of the year, the daily average wind speed is 9.4 miles per hour. The highest daily average wind speed during April is 11.6 miles per hour on April 29. The wind direction at Iqaluit Airport during April is predominantly out of the north from April 1 to April 5 and from April 11 to April 20 and the west from April 5 to April 11 and from April 20 to April 30. Water TemperatureIqaluit Airport 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 at Iqaluit Airport is essentially constant during April, remaining around 29°F throughout. The lowest average surface water temperature during April is 29°F on April 13. Growing SeasonDefinitions 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 at Iqaluit Airport typically lasts for 2.9 months (88 days), from around June 12 to around September 8, rarely starting before May 27 or after June 30, and rarely ending before August 22 or after September 26. The month of April at Iqaluit Airport is reliably fully outside of 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 at Iqaluit Airport are essentially constant during April, remaining around 0°F throughout. Solar EnergyThis 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 at Iqaluit Airport is rapidly increasing during April, rising by 1.5 kWh, from 3.3 kWh to 4.8 kWh, over the course of the month. TopographyFor the purposes of this report, the geographical coordinates of Iqaluit Airport are 63.755 deg latitude, -68.553 deg longitude, and 69 ft elevation. The topography within 2 miles of Iqaluit Airport contains significant variations in elevation, with a maximum elevation change of 594 feet and an average elevation above sea level of 149 feet. Within 10 miles contains significant variations in elevation (1,253 feet). Within 50 miles contains very significant variations in elevation (2,625 feet). The area within 2 miles of Iqaluit Airport is covered by sparse vegetation (34%), bare soil (31%), and grassland (27%), within 10 miles by water (31%) and sparse vegetation (31%), and within 50 miles by sparse vegetation (41%) and bare soil (41%). Data SourcesThis report illustrates the typical weather at Iqaluit Airport, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointIqaluit Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required. In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations. In this case, the only station close and reliable enough to use as a fallback is Iqaluit Climate. Other DataAll 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. DisclaimerThe 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. 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