April Weather at Shishmaref Airport United States

Daily high temperatures increase by 13°F, from 13°F to 26°F, rarely falling below -2°F or exceeding 37°F.

Daily low temperatures increase by 18°F, from -3°F to 15°F, rarely falling below -19°F or exceeding 28°F.

For reference, on July 27, the hottest day of the year, temperatures at Shishmaref Airport typically range from 47°F to 55°F, while on February 8, the coldest day of the year, they range from -9°F to 6°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.

Fermont, Canada (3,203 miles away) is the far-away foreign place with temperatures most similar to Shishmaref Airport (view comparison).

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The month of April at Shishmaref Airport experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 72% throughout the month. The highest chance of overcast or mostly cloudy conditions is 74% on April 12.

The clearest day of the month is April 30, with clear, mostly clear, or partly cloudy conditions 29% of the time.

For reference, on January 7, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 80%, while on September 17, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 39%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Shishmaref Airport, the chance of a wet day over the course of April is gradually increasing, starting the month at 7% and ending it at 11%.

For reference, the year's highest daily chance of a wet day is 29% on August 7, and its lowest chance is 5% on March 18.

Over the course of April at Shishmaref Airport, the chance of a day with only rain increases from 0% to 3%, the chance of a day with mixed snow and rain remains an essentially constant 2% throughout, and the chance of a day with only snow remains an essentially constant 5% throughout.

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 at Shishmaref Airport is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.5 inches or falling below -0.0 inches.

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 at Shishmaref Airport is essentially constant, remaining about 2.8 inches throughout, and rarely exceeding 6.7 inches or falling to 0.0 inches.

Due to its extreme latitude, Shishmaref Airport experiences polar day (also known as the midnight Sun) during the summer. The precise start and end dates of polar day and night vary from year to year and depend on the precise location and elevation of the observer, and the local topography.

Neither polar day nor polar night occur during the month of April.

Over the course of April at Shishmaref 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, 37 minutes, implying an average daily increase of 7 minutes, 29 seconds, and weekly increase of 52 minutes, 23 seconds.

The shortest day of the month is April 1, with 13 hours, 49 minutes of daylight and the longest day is April 30, with 17 hours, 26 minutes of daylight.

The latest sunrise of the month at Shishmaref Airport is 8:14 AM on April 1 and the earliest sunrise is 1 hour, 55 minutes earlier at 6:19 AM on April 30.

The earliest sunset is 10:03 PM on April 1 and the latest sunset is 1 hour, 42 minutes later at 11:45 PM on April 30.

Daylight saving time is observed at Shishmaref Airport during 2024, but it neither starts nor ends during April, so the entire month is in standard time.

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.

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.

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 at Shishmaref Airport is essentially constant during April, remaining around 0% throughout.

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 at Shishmaref Airport is rapidly decreasing during April, decreasing from 12.7 miles per hour to 10.7 miles per hour over the course of the month.

For reference, on December 24, the windiest day of the year, the daily average wind speed is 15.0 miles per hour, while on June 29, the calmest day of the year, the daily average wind speed is 8.9 miles per hour.

The hourly average wind direction at Shishmaref Airport throughout April is predominantly from the north, with a peak proportion of 50% on April 18.

Shishmaref 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 Shishmaref Airport is essentially constant during April, remaining around 29°F throughout.

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 at Shishmaref Airport typically lasts for 3.3 months (102 days), from around June 16 to around September 26, rarely starting before June 1 or after July 1, and rarely ending before September 10 or after October 11.

The month of April at Shishmaref 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 Shishmaref Airport are essentially constant during April, remaining around 0°F throughout.

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 at Shishmaref Airport is rapidly increasing during April, rising by 1.7 kWh, from 2.9 kWh to 4.6 kWh, over the course of the month.

For the purposes of this report, the geographical coordinates of Shishmaref Airport are 66.253 deg latitude, -166.079 deg longitude, and 20 ft elevation.

The topography within 2 miles of Shishmaref Airport is essentially flat, with a maximum elevation change of 23 feet and an average elevation above sea level of 3 feet. Within 10 miles is essentially flat (157 feet). Within 50 miles contains only modest variations in elevation (2,854 feet).

The area within 2 miles of Shishmaref Airport is covered by water (95%), within 10 miles by water (85%), and within 50 miles by water (55%) and shrubs (24%).