Average Weather in Little Rock Arkansas, United States
Little Rock has a warm humid temperate climate with hot summers and no dry season. The temperature typically varies from 34°F to 93°F over the course of the year, and is rarely below 21°F or above 100°F.
The hot season lasts for 115 days, from May 28 to September 20, with an average daily high temperature above 84°F. The hottest day of the year is July 22, with an average high of 93°F and low of 74°F.
The cool season lasts for 91 days, from November 26 to February 25, with an average daily high temperature below 59°F. The coldest day of the year is January 16, with an average low of 34°F and high of 51°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 Little Rock varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 49 minutes of daylight; the longest day is June 21, with 14 hours, 29 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 5:55 AM on June 12, and the latest sunrise is 1 hour, 38 minutes later at 7:32 AM on November 4. The earliest sunset is at 4:57 PM on December 5, and the latest sunset is 3 hours, 29 minutes later at 8:26 PM on June 29.
Daylight saving time (DST) is observed in Little Rock 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 Little Rock, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.
The clearer part of the year in Little Rock begins around June 12 and lasts for 150 days, ending around November 9. On October 5, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 71% of the time, and overcast or mostly cloudy 29% of the time.
The cloudier part of the year begins around November 9 and lasts for 215 days, ending around June 12. On March 1, the cloudiest day of the year, the sky is overcast or mostly cloudy 49% of the time, and clear, mostly clear, or partly cloudy 51% 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 Little Rock varies throughout the year.
The wetter season lasts 143 days, from March 15 to August 5, with a greater than 31% chance of a given day being a wet day. The chance of a wet day peaks at 40% on May 15.
The drier season lasts 222 days, from August 5 to March 15. The smallest chance of a wet day is 23% on January 12.
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 40% on May 15.
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. Little Rock experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Little Rock. The most rain falls during the 31 days centered around May 1, with an average total accumulation of 5.0 inches.
The least rain falls around August 23, with and average total accumulation of 2.4 inches.
Average Monthly Rainfall
The sliding 31-day liquid-equivalent quantity of snowfall in Little Rock does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.
Average Liquid-Equivalent Monthly Snowfall
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.
Little Rock experiences very significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 147 days, from May 8 to October 2, during which time the comfort level is muggy, oppressive, or miserable at least 23% of the time. The muggiest day of the year is July 22, with muggy conditions 90% of the time.
The least muggy day of the year is January 13, when muggy conditions are essentially unheard of.
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 Little Rock experiences mildly seasonal variation over the course of the year.
The windier part of the year lasts for 214 days, from October 18 to May 20, with average wind speeds of more than 3.3 miles per hour. The windiest day of the year is April 1, with an average hourly wind speed of 4.0 miles per hour.
The calmer time of year lasts for 151 days, from May 20 to October 18. The calmest day of the year is July 28, with an average hourly wind speed of 2.5 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Little Rock varies throughout the year.
The wind is most often from the south for 166 days, from February 20 to August 5 and for 86 days, from October 1 to December 26, with a peak percentage of 46% on May 19. The wind is most often from the east for 57 days, from August 5 to October 1, with a peak percentage of 39% on September 6. The wind is most often from the north for 56 days, from December 26 to February 20, with a peak percentage of 32% 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 141 days, from April 12 to August 31, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest day of the year is June 21, with an average of 6.8 kWh.
The darker period of the year lasts for 89 days, from November 9 to February 6, with an average daily incident shortwave energy per square meter below 3.3 kWh. The darkest day of the year is December 23, with an average of 2.5 kWh.
Average Daily Incident Shortwave Solar Energy
The area within 2 miles of Little Rock is covered by artificial surfaces (92%), within 10 miles by artificial surfaces (46%) and trees (28%), and within 50 miles by trees (45%) and cropland (39%).
The topography within 2 miles of Little Rock contains only modest variations in elevation, with a maximum elevation change of 331 feet, and an average elevation above sea level of 306 feet. Within 10 miles contains significant variations in elevation (640 feet). Within 50 miles contains very significant variations in elevation (1,716 feet).
This report illustrates the typical weather in Little Rock, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Little Rock.
For each station, the records are are corrected for the elevation difference between that station and Little Rock 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 Little Rock is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Little Rock and a given station.
The stations contributing to this reconstruction are: Adams Field (88%, 5.1 kilometers, southeast), Robert Chris McIntosh Airport (9%, 23 kilometers, northeast), Memorial Field Airport (1.3%, 87 kilometers, southwest), and Russellville Municipal Airport (1.1%, 93 kilometers, northwest).
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 .