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Average Weather in Arkadelphia Arkansas, United States

In Arkadelphia, the temperature typically varies from 33°F to 95°F over the course of the year, and is rarely below 20°F or above 103°F.

The hot season lasts for 3.7 months, from May 29 to September 19, with an average daily high temperature above 86°F. The hottest day of the year is July 22, with an average high of 95°F and low of 72°F.

The cool season lasts for 2.9 months, from November 26 to February 24, with an average daily high temperature below 61°F. The coldest day of the year is January 16, with an average low of 33°F and high of 54°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature with percentile bands, 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

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecchillychillycoldcoldcoolcoolcomfortablecomfortablewarmwarmhothot
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.

Sun

The length of the day in Arkadelphia varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 53 minutes of daylight; the longest day is June 21, with 14 hours, 26 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 6:00 AM on June 11, and the latest sunrise is 1 hour, 35 minutes later at 7:34 AM on November 4. The earliest sunset is at 5:02 PM on December 4, and the latest sunset is 3 hours, 25 minutes later at 8:27 PM on June 29.

Daylight saving time (DST) is observed in Arkadelphia 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

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.

Clouds

In Arkadelphia, 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 Arkadelphia begins around June 8 and lasts for 5.1 months, ending around November 11. On October 5, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 70% of the time, and overcast or mostly cloudy 30% of the time.

The cloudier part of the year begins around November 11 and lasts for 6.9 months, ending around June 8. On January 3, the cloudiest day of the year, the sky is overcast or mostly cloudy 50% of the time, and clear, mostly clear, or partly cloudy 50% of the time.

Cloud Cover

clearerclearercloudiercloudiercloudiercloudier0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJan 350%Jan 350%Oct 530%Oct 530%Jun 840%Jun 840%Nov 1140%Nov 1140%overcastovercastmostly cloudymostly cloudyclearclear
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 in Arkadelphia varies throughout the year.

The wetter season lasts 3.2 months, from April 8 to July 14, with a greater than 32% chance of a given day being a wet day. The chance of a wet day peaks at 41% on May 15.

The drier season lasts 8.8 months, from July 14 to April 8. The smallest chance of a wet day is 22% on September 29.

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 41% on May 15.

Daily Chance of Precipitation

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 in the year. Arkadelphia experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Arkadelphia. The most rain falls during the 31 days centered around May 3, with an average total accumulation of 5.0 inches.

The least rain falls around August 24, with and average total accumulation of 2.7 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.

Snowfall

The sliding 31-day liquid-equivalent quantity of snowfall in Arkadelphia 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

The average liquid-equivalent snowfall (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 rainfall.

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.

Arkadelphia experiences very significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 5.4 months, from April 27 to October 7, 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 21, with muggy conditions 1% of the time.

Humidity Comfort Levels

muggymuggy0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJan 211%Jan 211%95%Jul 2395%Jul 23Apr 2725%Apr 2725%Oct 725%Oct 725%miserablemiserableoppressiveoppressivehumidhumidcomfortablecomfortabledrydry
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 in Arkadelphia does not vary significantly over the course of the year, remaining within 0.5 miles per hour of 2.2 miles per hour throughout.

Average Wind Speed

0.0 mph0.5 mph1.0 mph1.5 mph2.0 mph2.5 mph3.0 mph3.5 mph4.0 mphJanFebMarAprMayJunJulAugSepOctNovDecApr 12.7 mphApr 12.7 mphJul 311.7 mphJul 311.7 mph
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 in Arkadelphia varies throughout the year.

The wind is most often from the south for 6.0 months, from February 19 to August 20 and for 2.7 months, from October 1 to December 24, with a peak percentage of 49% on May 20. The wind is most often from the east for 1.4 months, from August 20 to October 1, with a peak percentage of 37% on September 6. The wind is most often from the north for 1.8 months, from December 24 to February 19, with a peak percentage of 32% on January 6.

Wind Direction

NNSSEESS0%20%40%60%80%100%JanFebMarAprMayJunJulAugSepOctNovDecsouthsoutheasteastnorthnorthwestwest
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).

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 4.6 months, 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 16, with an average of 6.8 kWh.

The darker period of the year lasts for 2.9 months, from November 10 to February 7, with an average daily incident shortwave energy per square meter below 3.4 kWh. The darkest day of the year is December 23, with an average of 2.5 kWh.

Average Daily Incident Shortwave Solar Energy

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 Arkadelphia are 34.121 deg latitude, -93.054 deg longitude, and 187 ft elevation (map ).

The topography within 2 miles of Arkadelphia contains only modest variations in elevation, with a maximum elevation change of 190 feet, and an average elevation above sea level of 206 feet. Within 10 miles contains significant variations in elevation (522 feet). Within 50 miles contains large variations in elevation (2,031 feet).

The area within 2 miles of Arkadelphia is covered by cropland (30%), artificial surfaces (28%), trees (27%), and herbaceous vegetation (13%), within 10 miles by trees (62%) and cropland (20%), and within 50 miles by trees (77%) and cropland (10%).

Data Sources

This report illustrates the typical weather in Arkadelphia, 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 Arkadelphia.

For each station, the records are corrected for the elevation difference between that station and Arkadelphia 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 Arkadelphia is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Arkadelphia and a given station.

The stations contributing to this reconstruction are: Arkadelphia, Dexter B Florence Memorial Field Airport (96%, 2.6 kilometers, southwest), Memorial Field Airport (4.0%, 19 kilometers, north), and Grider Field (0.4%, 103 kilometers, east).

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 .