This report describes the typical weather at the Arkadelphia/Dexter (Arkadelphia, Arkansas, United States) weather station over the course of an average year. It is based on the historical records from 2007 to 2012. Earlier records are either unavailable or unreliable.
Arkadelphia, Arkansas has a warm humid temperate climate with hot summers and no dry season. The area within 25 mi of this station is covered by forests (97%).
Over the course of a year, the temperature typically varies from 30Â°F to 97Â°F and is rarely below 21Â°F or above 104Â°F.
The warm season lasts from May 28 to September 7 with an average daily high temperature above 88Â°F. The hottest day of the year is July 31, with an average high of 97Â°F and low of 73Â°F.
The cold season lasts from November 24 to February 23 with an average daily high temperature below 60Â°F. The coldest day of the year is January 5, with an average low of 30Â°F and high of 52Â°F.
The length of the day varies significantly over the course of the year. The shortest day is December 21 with 9:54 hours of daylight; the longest day is June 20 with 14:26 hours of daylight.
The earliest sunrise is at 6:00am on June 9 and the latest sunset is at 8:28pm on July 1. The latest sunrise is at 7:34am on November 2 and the earliest sunset is at 5:02pm on December 4.
Daylight saving time (DST) is observed in this location during 2012, starting in the spring on March 11 and ending in the fall on November 4.
The median cloud cover ranges from 4% (clear) to 44% (partly cloudy). The sky is cloudiest on January 8 and clearest on July 19. The clearer part of the year begins around April 29. The cloudier part of the year begins around October 30.
On July 19, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 87% of the time, and overcast or mostly cloudy 11% of the time.
On January 8, the cloudiest day of the year, the sky is overcast, mostly cloudy, or partly cloudy 41% of the time, and clear or mostly clear 44% of the time.
The probability that precipitation will be observed at this location varies throughout the year. Precipitation is most likely around December 10, occurring in 45% of days. Precipitation is least likely around January 28, occurring in 31% of days.
Over the entire year, the most common forms of precipitation are thunderstorms, light rain, moderate rain, and heavy rain.
Thunderstorms are the most severe precipitation observed during 39% of those days with precipitation. They are most likely around July 25, when it is observed during 25% of all days.
Light rain is the most severe precipitation observed during 28% of those days with precipitation. It is most likely around December 9, when it is observed during 16% of all days.
Moderate rain is the most severe precipitation observed during 15% of those days with precipitation. It is most likely around December 13, when it is observed during 10% of all days.
Heavy rain is the most severe precipitation observed during 13% of those days with precipitation. It is most likely around November 24, when it is observed during 9% of all days.
During the warm season, which lasts from May 28 to September 7, there is a 34% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of thunderstorms (61% of days with precipitation have at worst thunderstorms), light rain (20%), heavy rain (10%), and moderate rain (9%).
During the cold season, which lasts from November 24 to February 23, there is a 38% average chance that precipitation will be observed at some point during a given day. When precipitation does occur it is most often in the form of light rain (33% of days with precipitation have at worst light rain), moderate rain (19%), thunderstorms (17%), and moderate snow (14%).
The likelihood of snow falling is highest around January 5, occurring in 8% of days.
Either snow rarely accumulates at this location or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 45% (comfortable) to 98% (very humid) over the course of the year, rarely dropping below 26% (dry) and reaching as high as 100% (very humid).
The air is driest around February 28, at which time the relative humidity drops below 56% (mildly humid) three days out of four; it is most humid around May 7, exceeding 97% (very humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a year, the dew point typically varies from 24Â°F (dry) to 78Â°F (oppressive) and is rarely below 13Â°F (dry) or above 80Â°F (very oppressive).
There are two periods in the year that are most comfortable: The first is between March 4 and May 2 and the second is between September 30 and November 21. The air feels neither too dry nor too muggy during these periods.
Over the course of the year typical wind speeds vary from 0 mph to 13 mph (calm to moderate breeze), rarely exceeding 18 mph (fresh breeze).
The highest average wind speed of 6 mph (light breeze) occurs around March 2, at which time the average daily maximum wind speed is 13 mph (moderate breeze).
The lowest average wind speed of 2 mph (light air) occurs around July 23, at which time the average daily maximum wind speed is 8 mph (gentle breeze).