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Average Weather at High Island Louisiana, United States

At High Island, the summers are hot and oppressive, the winters are comfortable and windy, and it is wet and partly cloudy year round. Over the course of the year, the temperature typically varies from 61°F to 88°F and is rarely below 53°F or above 90°F.

The hot season lasts for 3.8 months, from June 6 to September 29, with an average daily high temperature above 83°F. The hottest day of the year is August 9, with an average high of 88°F and low of 84°F.

The cool season lasts for 3.5 months, from December 8 to March 23, with an average daily high temperature below 71°F. The coldest day of the year is January 23, with an average low of 61°F and high of 67°F.

Average High and Low Temperature

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 entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature

Average Hourly Temperature at High Island12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDeccoolcomfortablewarmhot
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Clouds

At High Island, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year at High Island begins around March 14 and lasts for 3.4 months, ending around June 26. On June 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 68% of the time, and overcast or mostly cloudy 32% of the time.

The cloudier part of the year begins around June 26 and lasts for 8.6 months, ending around March 14. On August 16, the cloudiest day of the year, the sky is overcast or mostly cloudy 58% of the time, and clear, mostly clear, or partly cloudy 42% of the time.

Cloud Cover

Cloud Cover at High Islandclearercloudiercloudier0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecAug 1658%Aug 1658%Jun 332%Jun 332%Mar 1445%Mar 1445%Jun 2646%Jun 2646%overcastmostly cloudypartly cloudymostly clearclear
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at High Island varies throughout the year.

The wetter season lasts 3.9 months, from May 29 to September 27, with a greater than 31% chance of a given day being a wet day. The chance of a wet day peaks at 42% on September 6.

The drier season lasts 8.1 months, from September 27 to May 29. The smallest chance of a wet day is 19% on April 2.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 42% on September 6.

Daily Chance of Precipitation

Daily Chance of Precipitation at High Islandwetdrydry0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecSep 642%Sep 642%Apr 219%Apr 219%Jan 129%Jan 129%May 2931%May 2931%Sep 2731%Sep 2731%rain
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 months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. High Island experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year at High Island. The most rain falls during the 31 days centered around September 11, with an average total accumulation of 4.9 inches.

The least rain falls around April 13, with an average total accumulation of 2.9 inches.

Average Monthly Rainfall

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 liquid-equivalent snowfall.

Sun

The length of the day at High Island varies over the course of the year. In 2017, the shortest day is December 21, with 10 hours, 21 minutes of daylight; the longest day is June 21, with 13 hours, 56 minutes of daylight.

Hours of Daylight and Twilight

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 earliest sunrise is at 7:20 AM on June 10, and the latest sunrise is 1 hour, 11 minutes later at 8:31 AM on November 4. The earliest sunset is at 6:21 PM on December 1, and the latest sunset is 2 hours, 57 minutes later at 9:18 PM on June 30.

Daylight saving time (DST) is observed at High Island during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time at High Island2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AM2 AMJanFebMarAprMayJunJulAugSepOctNovDecJun 107:20 AMJun 107:20 AM9:18 PMJun 309:18 PMJun 30Dec 16:21 PMDec 16:21 PM8:31 AMNov 48:31 AMNov 4Mar 12DSTMar 12DSTDSTNov 5DSTNov 5daynightnightnightnight
The solar day over the course of the year 2017. 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 transitions to and from daylight saving time are indicated by the 'DST' labels.

Humidity

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.

High Island experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 8.0 months, from March 12 to November 13, during which time the comfort level is muggy, oppressive, or miserable at least 33% of the time. The muggiest day of the year is August 9, with muggy conditions 100% of the time.

The least muggy day of the year is January 16, with muggy conditions 10% of the time.

Humidity Comfort Levels

Humidity Comfort Levels at High Islandmuggy0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJan 1610%Jan 1610%100%Aug 9100%Aug 9Mar 1233%Mar 1233%Nov 1333%Nov 1333%miserablemiserableoppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortabledrydry
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 High Island experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 8.0 months, from September 21 to May 22, with average wind speeds of more than 6.7 miles per hour. The windiest day of the year is December 25, with an average hourly wind speed of 8.4 miles per hour.

The calmer time of year lasts for 4.0 months, from May 22 to September 21. The calmest day of the year is August 12, with an average hourly wind speed of 5.0 miles per hour.

Average Wind Speed

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

The predominant average hourly wind direction at High Island varies throughout the year.

The wind is most often from the south for 6.6 months, from February 5 to August 24 and for 1.0 months, from November 11 to December 12, with a peak percentage of 65% on July 11. The wind is most often from the east for 2.6 months, from August 24 to November 11, with a peak percentage of 51% on September 23. The wind is most often from the north for 1.8 months, from December 12 to February 5, with a peak percentage of 37% on January 1.

Wind Direction

Wind Direction at High IslandNSESN0%20%40%60%80%100%JanFebMarAprMayJunJulAugSepOctNovDecwestsoutheastnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

High Island 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 water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.9 months, from June 9 to October 7, with an average temperature above 82°F. The day of the year with the warmest water is August 11, with an average temperature of 85°F.

The time of year with cooler water lasts for 3.6 months, from December 22 to April 11, with an average temperature below 71°F. The day of the year with the coolest water is February 6, with an average temperature of 67°F.

Average Water Temperature

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

Solar Energy

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 experiences significant seasonal variation over the course of the year.

The brighter period of the year lasts for 2.9 months, from March 31 to June 26, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest day of the year is June 3, with an average of 6.6 kWh.

The darker period of the year lasts for 2.5 months, from November 16 to February 2, with an average daily incident shortwave energy per square meter below 3.7 kWh. The darkest day of the year is December 24, with an average of 3.0 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy at High Islandbrightdarkdark0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWhJanFebMarAprMayJunJulAugSepOctNovDecJun 36.6 kWhJun 36.6 kWhDec 243.0 kWhDec 243.0 kWhMar 315.9 kWhMar 315.9 kWhFeb 23.7 kWhFeb 23.7 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of High Island are 28.133 deg latitude, -94.400 deg longitude, and 0 ft elevation.

The topography within 2 miles of High Island is essentially flat, with a maximum elevation change of 0 feet and an average elevation above sea level of 0 feet. Within 10 miles is also essentially flat (0 feet). Within 50 miles is also essentially flat (0 feet).

The area within 2 miles of High Island is covered by water (100%), within 10 miles by water (100%), and within 50 miles by water (100%).

Data Sources

This report illustrates the typical weather at High Island, 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

High Island 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.

The stations on which we may fall back are High Island A572c and East Addition B323.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , 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 aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.