Average Weather in Jackson Mississippi, United States
In Jackson, the temperature typically varies from 38°F to 92°F over the course of the year, and is rarely below 24°F or above 97°F.
The hot season lasts for 125 days, from May 22 to September 24, with an average daily high temperature above 85°F. The hottest day of the year is August 9, with an average high of 92°F and low of 73°F.
The cool season lasts for 86 days, from November 29 to February 23, with an average daily high temperature below 64°F. The coldest day of the year is January 16, with an average low of 38°F and high of 58°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
The length of the day in Jackson varies significantly over the course of the year. In 2017, the shortest day is December 21, with 10 hours, 2 minutes of daylight; the longest day is June 21, with 14 hours, 16 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:53 AM on June 12, and the latest sunrise is 1 hour, 27 minutes later at 7:20 AM on November 4. The earliest sunset is at 4:55 PM on December 3, and the latest sunset is 3 hours, 16 minutes later at 8:11 PM on June 29.
Daylight saving time (DST) is observed in Jackson during 2017, starting in the spring on March 12, lasting 237 days, and ending in the fall on November 5.
Sunrise & Sunset with Twilight and Daylight Saving Time
In Jackson, 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 Jackson begins around July 31 and lasts for 116 days, ending around November 24. On October 5, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 69% of the time, and overcast or mostly cloudy 31% of the time.
The cloudier part of the year begins around November 24 and lasts for 249 days, ending around July 31. On January 3, the cloudiest day of the year, the sky is overcast or mostly cloudy 52% of the time, and clear, mostly clear, or partly cloudy 48% 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 Jackson varies throughout the year.
The wetter season lasts 239 days, from December 25 to August 21, with a greater than 33% chance of a given day being a wet day. The chance of a wet day peaks at 44% on July 8.
The drier season lasts 126 days, from August 21 to December 25. The smallest chance of a wet day is 22% 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 44% on July 8.
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 in the year. Jackson experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Jackson. The most rain falls during the 31 days centered around February 15, with an average total accumulation of 5.3 inches.
The least rain falls around September 12, with and average total accumulation of 2.9 inches.
Average Monthly Rainfall
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.
Jackson experiences very significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 163 days, from May 1 to October 11, during which time the comfort level is muggy, oppressive, or miserable at least 25% of the time. The muggiest day of the year is July 23, with muggy conditions 95% of the time.
The least muggy day of the year is January 29, with muggy conditions 1% 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 Jackson experiences mildly seasonal variation over the course of the year.
The windier part of the year lasts for 225 days, from October 4 to May 17, with average wind speeds of more than 2.7 miles per hour. The windiest day of the year is February 25, with an average hourly wind speed of 3.4 miles per hour.
The calmer time of year lasts for 140 days, from May 17 to October 4. The calmest day of the year is July 29, with an average hourly wind speed of 2.0 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Jackson varies throughout the year.
The wind is most often from the south for 151 days, from February 21 to July 22; for 22 days, from July 31 to August 22; and for 63 days, from October 16 to December 18, with a peak percentage of 51% on May 15. The wind is most often from the east for 37 days, from August 22 to September 28, with a peak percentage of 35% on September 9. The wind is most often from the north for 18 days, from September 28 to October 16 and for 65 days, from December 18 to February 21, with a peak percentage of 36% on January 6.
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 139 days, from April 5 to August 22, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest day of the year is June 2, with an average of 6.6 kWh.
The darker period of the year lasts for 80 days, from November 15 to February 3, with an average daily incident shortwave energy per square meter below 3.5 kWh. The darkest day of the year is December 25, with an average of 2.7 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Jackson are 32.299 deg latitude, -90.185 deg longitude, and 285 ft elevation (map ).
The topography within 2 miles of Jackson contains only modest variations in elevation, with a maximum elevation change of 138 feet, and an average elevation above sea level of 285 feet. Within 10 miles also contains only modest variations in elevation (249 feet). Within 50 miles contains significant variations in elevation (577 feet).
The area within 2 miles of Jackson is covered by artificial surfaces (94%), within 10 miles by artificial surfaces (37%) and trees (27%), and within 50 miles by trees (53%) and cropland (27%).
This report illustrates the typical weather in Jackson, 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 Jackson.
For each station, the records are corrected for the elevation difference between that station and Jackson 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 Jackson is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Jackson and a given station.
The stations contributing to this reconstruction are: Hawkins Field (71%, 5.5 kilometers, northwest), Jackson-Evers International Airport (29%, 10 kilometers, east), and Mc Comb/Pike County Airport/John E Lewis Field (0.7%, 127 kilometers, south).
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 .