Average Weather in Hattiesburg Mississippi, United States
In Hattiesburg, the summers are long, hot, and oppressive; the winters are short and cold; and it is wet and partly cloudy year round. Over the course of the year, the temperature typically varies from 40°F to 92°F and is rarely below 26°F or above 97°F.
The hot season lasts for 4.2 months, from May 20 to September 25, with an average daily high temperature above 85°F. The hottest day of the year is August 10, with an average high of 92°F and low of 73°F.
The cool season lasts for 2.8 months, from November 30 to February 23, with an average daily high temperature below 66°F. The coldest day of the year is January 17, with an average low of 40°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 Hattiesburg, 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 Hattiesburg begins around August 28 and lasts for 3.3 months, ending around December 5. On October 12, 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 December 5 and lasts for 8.7 months, ending around August 28. On July 12, the cloudiest day of the year, the sky is overcast or mostly cloudy 53% of the time, and clear, mostly clear, or partly cloudy 47% 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 Hattiesburg varies significantly throughout the year.
The wetter season lasts 2.9 months, from May 31 to August 27, with a greater than 37% chance of a given day being a wet day. The chance of a wet day peaks at 55% on July 26.
The drier season lasts 9.1 months, from August 27 to May 31. The smallest chance of a wet day is 20% on October 8.
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 55% on July 26.
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. Hattiesburg experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Hattiesburg. The most rain falls during the 31 days centered around February 15, with an average total accumulation of 5.5 inches.
The least rain falls around October 6, with and average total accumulation of 3.1 inches.
Average Monthly Rainfall
The length of the day in Hattiesburg varies significantly over the course of the year. In 2017, the shortest day is December 21, with 10 hours, 7 minutes of daylight; the longest day is June 21, with 14 hours, 11 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, 23 minutes later at 7:15 AM on November 4. The earliest sunset is at 4:53 PM on December 3, and the latest sunset is 3 hours, 12 minutes later at 8:05 PM on June 30.
Daylight saving time (DST) is observed in Hattiesburg 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.
Hattiesburg experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 5.5 months, from April 30 to October 16, during which time the comfort level is muggy, oppressive, or miserable at least 26% of the time. The muggiest day of the year is July 23, with muggy conditions 96% of the time.
The least muggy day of the year is January 29, with muggy conditions 2% 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 Hattiesburg does not vary significantly over the course of the year, remaining within 0.5 miles per hour of 2.0 miles per hour throughout.
Average Wind Speed
The predominant average hourly wind direction in Hattiesburg varies throughout the year.
The wind is most often from the south for 6.2 months, from February 23 to August 28, with a peak percentage of 52% on May 21. The wind is most often from the east for 4.0 weeks, from August 28 to September 25, with a peak percentage of 33% on September 19. The wind is most often from the north for 4.9 months, from September 25 to February 23, with a peak percentage of 38% on January 1.
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 3.8 months, from April 4 to July 29, 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 16 to February 3, with an average daily incident shortwave energy per square meter below 3.6 kWh. The darkest day of the year is December 24, with an average of 2.8 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Hattiesburg are 31.327 deg latitude, -89.290 deg longitude, and 161 ft elevation.
The topography within 2 miles of Hattiesburg contains only modest variations in elevation, with a maximum elevation change of 115 feet and an average elevation above sea level of 156 feet. Within 10 miles also contains only modest variations in elevation (351 feet). Within 50 miles contains only modest variations in elevation (554 feet).
The area within 2 miles of Hattiesburg is covered by artificial surfaces (70%) and cropland (12%), within 10 miles by trees (36%) and cropland (24%), and within 50 miles by trees (57%) and herbaceous vegetation (19%).
This report illustrates the typical weather in Hattiesburg, 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 Hattiesburg.
For each station, the records are corrected for the elevation difference between that station and Hattiesburg 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 Hattiesburg is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Hattiesburg and a given station.
The stations contributing to this reconstruction are: Hattiesburg Municipal Airport (81%, 6 kilometers, southeast); Hattiesburg–Laurel Regional Airport (18%, 16 kilometers, north); and Mc Comb/Pike County Airport/John E Lewis Field (1.0%, 113 kilometers, west).
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.