Average Weather in Biloxi Mississippi, United States
In Biloxi, the summers are long, hot, and oppressive; the winters are cold and windy; and it is wet and partly cloudy year round. Over the course of the year, the temperature typically varies from 45°F to 89°F and is rarely below 32°F or above 94°F.
The hot season lasts for 4.2 months, from May 22 to September 29, with an average daily high temperature above 83°F. The hottest day of the year is July 23, with an average high of 89°F and low of 77°F.
The cool season lasts for 3.0 months, from December 2 to March 3, with an average daily high temperature below 66°F. The coldest day of the year is January 17, with an average low of 45°F and high of 60°F.
Average High and Low Temperature
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
In Biloxi, 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 in Biloxi begins around September 5 and lasts for 9.4 months, ending around June 16. On October 26, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 67% of the time, and overcast or mostly cloudy 33% of the time.
The cloudier part of the year begins around June 16 and lasts for 2.6 months, ending around September 5. On July 13, the cloudiest day of the year, the sky is overcast or mostly cloudy 60% of the time, and clear, mostly clear, or partly cloudy 40% of the time.
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Biloxi varies significantly throughout the year.
The wetter season lasts 3.0 months, from June 8 to September 8, with a greater than 40% chance of a given day being a wet day. The chance of a wet day peaks at 58% on July 28.
The drier season lasts 9.0 months, from September 8 to June 8. The smallest chance of a wet day is 21% on October 30.
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 58% on July 28.
Daily Chance of Precipitation
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. Biloxi experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Biloxi. The most rain falls during the 31 days centered around July 19, with an average total accumulation of 5.6 inches.
The least rain falls around October 18, with an average total accumulation of 3.2 inches.
Average Monthly Rainfall
The length of the day in Biloxi varies significantly over the course of the year. In 2017, the shortest day is December 21, with 10 hours, 11 minutes of daylight; the longest day is June 21, with 14 hours, 7 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:52 AM on June 11, and the latest sunrise is 1 hour, 20 minutes later at 7:12 AM on November 4. The earliest sunset is at 4:54 PM on December 3, and the latest sunset is 3 hours, 7 minutes later at 8:01 PM on June 30.
Daylight saving time (DST) is observed in Biloxi 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
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.
Biloxi experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 7.0 months, from April 3 to November 2, during which time the comfort level is muggy, oppressive, or miserable at least 28% of the time. The muggiest day of the year is July 22, with muggy conditions 99% of the time.
The least muggy day of the year is January 29, with muggy conditions 4% of the time.
Humidity Comfort Levels
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 Biloxi experiences mild seasonal variation over the course of the year.
The windier part of the year lasts for 7.9 months, from September 23 to May 19, with average wind speeds of more than 4.5 miles per hour. The windiest day of the year is December 25, with an average hourly wind speed of 5.4 miles per hour.
The calmer time of year lasts for 4.1 months, from May 19 to September 23. The calmest day of the year is August 8, with an average hourly wind speed of 3.5 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Biloxi varies throughout the year.
The wind is most often from the south for 5.0 months, from February 26 to July 26 and for 3.3 weeks, from August 3 to August 26, with a peak percentage of 51% on May 21. The wind is most often from the east for 2.2 months, from August 26 to November 3, with a peak percentage of 40% on September 20. The wind is most often from the north for 3.8 months, from November 3 to February 26, with a peak percentage of 40% on January 1.
Biloxi 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 significant seasonal variation over the course of the year.
The time of year with warmer water lasts for 4.1 months, from May 27 to September 30, with an average temperature above 80°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 3.3 months, from December 8 to March 17, with an average temperature below 64°F. The day of the year with the coolest water is January 27, with an average temperature of 59°F.
Average Water Temperature
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 2.7 months, from April 1 to June 21, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest day of the year is May 19, with an average of 6.6 kWh.
The darker period of the year lasts for 2.5 months, from November 15 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 20, with an average of 3.0 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Biloxi are 30.396 deg latitude, -88.885 deg longitude, and 0 ft elevation.
The topography within 2 miles of Biloxi is essentially flat, with a maximum elevation change of 23 feet and an average elevation above sea level of 4 feet. Within 10 miles is essentially flat (131 feet). Within 50 miles also contains only modest variations in elevation (384 feet).
The area within 2 miles of Biloxi is covered by water (57%) and artificial surfaces (30%), within 10 miles by water (47%) and trees (17%), and within 50 miles by water (43%) and trees (25%).
This report illustrates the typical weather in Biloxi, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Biloxi.
For each station, the records are corrected for the elevation difference between that station and Biloxi 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 Biloxi is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Biloxi and a given station.
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.