Spring Weather at Saint Paul Island Airport United States

Daily high temperatures increase by 15°F, from 29°F to 44°F, rarely falling below 15°F or exceeding 49°F.

Daily low temperatures increase by 14°F, from 22°F to 36°F, rarely falling below 6°F or exceeding 40°F.

For reference, on August 12, the hottest day of the year, temperatures at Saint Paul Island Airport typically range from 46°F to 52°F, while on February 11, the coldest day of the year, they range from 21°F to 28°F.

The figure below shows you a compact characterization of the hourly average spring temperatures. 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.

Honningsvåg, Norway (3,552 miles away) is the far-away foreign place with temperatures most similar to Saint Paul Island Airport (view comparison).

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The spring at Saint Paul Island Airport experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 76% throughout the season. The lowest chance of overcast or mostly cloudy conditions is 74% on April 17.

The clearest day of the spring is April 17, with clear, mostly clear, or partly cloudy conditions 26% of the time.

For reference, on July 12, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 89%, while on October 6, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 37%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Saint Paul Island Airport, the chance of a wet day over the course of the spring is rapidly decreasing, starting the season at 25% and ending it at 18%.

For reference, the year's highest daily chance of a wet day is 36% on September 1, and its lowest chance is 16% on May 7.

Over the course of the spring at Saint Paul Island Airport, the chance of a day with only rain increases from 9% to 18%, the chance of a day with mixed snow and rain decreases from 6% to 0%, and the chance of a day with only snow decreases from 10% to 0%.

Rainfall

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

The average sliding 31-day rainfall during the spring at Saint Paul Island Airport is gradually increasing, starting the season at 0.7 inches, when it rarely exceeds 1.7 inches, and ending the season at 1.1 inches, when it rarely exceeds 2.0 inches or falls below 0.2 inches.

The lowest average 31-day accumulation is 0.6 inches on March 18.

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 the spring at Saint Paul Island Airport is very rapidly decreasing, starting the season at 7.3 inches, when it rarely exceeds 16.1 inches or falls below 1.3 inches, and ending the season at 0.1 inches, when it rarely exceeds 0.4 inches or falls below -0.0 inches.

Over the course of the spring at Saint Paul Island Airport, the length of the day is very rapidly increasing. From the start to the end of the season, the length of the day increases by 6 hours, 46 minutes, implying an average daily increase of 4 minutes, 27 seconds, and weekly increase of 31 minutes, 12 seconds.

The shortest day of the spring is March 1, with 10 hours, 43 minutes of daylight and the longest day is May 31, with 17 hours, 29 minutes of daylight.

The latest sunrise of the spring at Saint Paul Island Airport is 8:47 AM on March 10 and the earliest sunrise is 3 hours, 13 minutes earlier at 5:34 AM on May 31.

The earliest sunset is 6:55 PM on March 1 and the latest sunset is 4 hours, 8 minutes later at 11:03 PM on May 31.

Daylight saving time (DST) ends at 3:00 AM on March 10, 2024, shifting sunrise and sunset to be an hour earlier.

For reference, on June 20, the longest day of the year, the Sun rises at 5:24 AM and sets 17 hours, 56 minutes later, at 11:20 PM, while on December 21, the shortest day of the year, it rises at 9:59 AM and sets 6 hours, 40 minutes later, at 4:39 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.

The figure below presents a compact representation of key lunar data for the spring of 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 Saint Paul Island Airport is essentially constant during the spring, 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 Saint Paul Island Airport is very rapidly decreasing during the spring, decreasing from 20.0 miles per hour to 13.4 miles per hour over the course of the season.

For reference, on January 29, the windiest day of the year, the daily average wind speed is 21.8 miles per hour, while on July 14, the calmest day of the year, the daily average wind speed is 12.0 miles per hour.

The wind direction at Saint Paul Island Airport during the spring is predominantly out of the east from March 1 to March 4 and the north from March 4 to May 31.

Saint Paul Island 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 Saint Paul Island Airport is increasing during the spring, rising by 4°F, from 34°F to 38°F, over the course of the season.

The lowest average surface water temperature during the spring is 34°F on March 24.

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 Saint Paul Island Airport typically lasts for 4.0 months (121 days), from around June 1 to around September 30, rarely starting before May 11 or after June 21, and rarely ending before September 7 or after October 24.

The spring at Saint Paul Island Airport 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 48% over the course of the 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 Saint Paul Island Airport are essentially constant during the spring, 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 Saint Paul Island Airport is very rapidly increasing during the spring, rising by 3.1 kWh, from 1.5 kWh to 4.7 kWh, over the course of the season.

The highest average daily incident shortwave solar energy during the spring is 4.7 kWh on May 29.

For the purposes of this report, the geographical coordinates of Saint Paul Island Airport are 57.158 deg latitude, -170.230 deg longitude, and 39 ft elevation.

The topography within 2 miles of Saint Paul Island Airport contains only modest variations in elevation, with a maximum elevation change of 371 feet and an average elevation above sea level of 58 feet. Within 10 miles contains only modest variations in elevation (610 feet). Within 50 miles contains significant variations in elevation (991 feet).

The area within 2 miles of Saint Paul Island Airport is covered by water (47%) and grassland (35%), within 10 miles by water (90%), and within 50 miles by water (99%).