Summer Weather in Emerald Isle North Carolina, United States
Daily high temperatures increase by 4°F, from 80°F to 85°F, rarely falling below 74°F or exceeding 91°F. The highest daily average high temperature is 86°F on July 22.
Daily low temperatures increase by 5°F, from 67°F to 72°F, rarely falling below 59°F or exceeding 80°F. The highest daily average low temperature is 75°F on July 24.
For reference, on July 21, the hottest day of the year, temperatures in Emerald Isle typically range from 75°F to 86°F, while on January 29, the coldest day of the year, they range from 38°F to 55°F.
Average High and Low Temperature in the Summer in Emerald Isle
The figure below shows you a compact characterization of the hourly average summer 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.
Average Hourly Temperature in the Summer in Emerald Isle
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 summer in Emerald Isle experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 52% throughout the season. The highest chance of overcast or mostly cloudy conditions is 57% on July 26.
The clearest day of the summer is August 31, with clear, mostly clear, or partly cloudy conditions 53% of the time.
For reference, on July 26, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 57%, while on October 27, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 64%.
Cloud Cover Categories in the Summer in Emerald Isle
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Emerald Isle, the chance of a wet day over the course of the summer is rapidly increasing, starting the season at 35% and ending it at 41%.
For reference, the year's highest daily chance of a wet day is 51% on July 25, and its lowest chance is 21% on October 30.
Probability of Precipitation in the Summer in Emerald Isle
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 summer in Emerald Isle is very rapidly increasing, starting the season at 3.7 inches, when it rarely exceeds 6.2 inches or falls below 1.7 inches, and ending the season at 6.4 inches, when it rarely exceeds 11.7 inches or falls below 2.0 inches.
Average Monthly Rainfall in the Summer in Emerald Isle
Over the course of the summer in Emerald Isle, the length of the day is rapidly decreasing. From the start to the end of the season, the length of the day decreases by 1 hour, 24 minutes, implying an average daily decrease of 55 seconds, and weekly decrease of 6 minutes, 27 seconds.
The shortest day of the summer is August 31, with 12 hours, 56 minutes of daylight and the longest day is June 21, with 14 hours, 29 minutes of daylight.
Hours of Daylight and Twilight in the Summer in Emerald Isle
The earliest sunrise of the summer in Emerald Isle is 5:54 AM on June 13 and the latest sunrise is 46 minutes later at 6:39 AM on August 31.
The latest sunset is 8:24 PM on June 29 and the earliest sunset is 49 minutes earlier at 7:35 PM on August 31.
Daylight saving time is observed in Emerald Isle during 2023, but it neither starts nor ends during the summer, so the entire season is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:55 AM and sets 14 hours, 29 minutes later, at 8:24 PM, while on December 22, the shortest day of the year, it rises at 7:11 AM and sets 9 hours, 50 minutes later, at 5:01 PM.
Sunrise & Sunset with Twilight in the Summer in Emerald Isle
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 the Summer in Emerald Isle
The figure below presents a compact representation of key lunar data for the summer of 2023. 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 the Summer in Emerald Isle
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 Emerald Isle is very rapidly increasing during the summer, rising from 58% to 83% over the course of the season.
The highest chance of a muggy day during the summer is 95% on July 23.
For reference, on July 22, the muggiest day of the year, there are muggy conditions 95% of the time, while on February 10, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in the Summer in Emerald Isle
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 Emerald Isle is gradually decreasing during the summer, decreasing from 10.3 miles per hour to 9.7 miles per hour over the course of the season.
For reference, on February 27, the windiest day of the year, the daily average wind speed is 13.3 miles per hour, while on August 14, the calmest day of the year, the daily average wind speed is 9.2 miles per hour.
The lowest daily average wind speed during the summer is 9.2 miles per hour on August 14.
Average Wind Speed in the Summer in Emerald Isle
The wind direction in Emerald Isle during the summer is predominantly out of the south from June 1 to August 28 and the east from August 28 to August 31.
Wind Direction in the Summer in Emerald Isle
Emerald Isle 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 Emerald Isle is increasing during the summer, rising by 7°F, from 74°F to 81°F, over the course of the season.
The highest average surface water temperature during the summer is 82°F on August 7.
Average Water Temperature in the Summer in Emerald Isle
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 Emerald Isle typically lasts for 8.8 months (267 days), from around March 10 to around December 2, rarely starting before February 13 or after March 31, and rarely ending before November 12 or after December 23.
The summer in Emerald Isle is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in the Summer in Emerald Isle
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
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 Emerald Isle are very rapidly increasing during the summer, increasing by 2,597°F, from 1,406°F to 4,003°F, over the course of the season.
Growing Degree Days in the Summer in Emerald Isle
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 Emerald Isle is decreasing during the summer, falling by 1.2 kWh, from 6.6 kWh to 5.3 kWh, over the course of the season.
Average Daily Incident Shortwave Solar Energy in the Summer in Emerald Isle
For the purposes of this report, the geographical coordinates of Emerald Isle are 34.678 deg latitude, -76.951 deg longitude, and 3 ft elevation.
The topography within 2 miles of Emerald Isle is essentially flat, with a maximum elevation change of 26 feet and an average elevation above sea level of 1 feet. Within 10 miles is also essentially flat (62 feet). Within 50 miles is essentially flat (148 feet).
The area within 2 miles of Emerald Isle is covered by water (98%), within 10 miles by water (60%) and trees (17%), and within 50 miles by water (56%) and trees (22%).
This report illustrates the typical weather in Emerald Isle, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Emerald Isle.
For each station, the records are corrected for the elevation difference between that station and Emerald Isle 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 Emerald Isle is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Emerald Isle 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 Emerald Isle 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.
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.
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.
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