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Climate and Average Weather Year Round in Arkadelphia Arkansas, United States

In Arkadelphia, the summers are hot and oppressive, the winters are cold and wet, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 33°F to 95°F and is rarely below 20°F or above 103°F.

Based on the tourism score, the best times of year to visit Arkadelphia for warm-weather activities are from late April to mid June and from mid August to mid October.

Climate in Arkadelphia

coldcoolwarmhotwarmcoolJanFebMarAprMayJunJulAugSepOctNovDecNowNow70%70%50%50%clearovercastprecipitation: 5.0 inprecipitation: 5.0 in2.7 in2.7 inmuggy: 95%muggy: 95%1%1%drydrytourism score: 6.0tourism score: 6.01.11.1
Arkadelphia weather by month. Click on each chart for more information.

The hot season lasts for 3.7 months, from May 29 to September 18, with an average daily high temperature above 86°F. The hottest month of the year in Arkadelphia is July, with an average high of 94°F and low of 72°F.

The cool season lasts for 3.0 months, from November 25 to February 24, with an average daily high temperature below 61°F. The coldest month of the year in Arkadelphia is January, with an average low of 33°F and high of 53°F.

Average High and Low Temperature in Arkadelphia

Average High and Low Temperature in ArkadelphiahotcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°F110°F110°FJan 1654°FJan 1654°FJul 2195°FJul 2195°F33°F33°F72°F72°FMay 2986°FMay 2986°FSep 1886°FSep 1886°FNov 2561°FNov 2561°FFeb 2461°FFeb 2461°F65°F65°F63°F63°F40°F40°F38°F38°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High 53°F59°F68°F76°F83°F91°F94°F94°F87°F76°F65°F55°F
Temp. 42°F46°F55°F63°F71°F79°F82°F81°F74°F62°F52°F44°F
Low 33°F37°F45°F53°F62°F69°F72°F71°F63°F52°F43°F36°F

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 Arkadelphia

Average Hourly Temperature in ArkadelphiaJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMNowNowvery coldvery coldvery coldcoldcoldcoolcoolcomfortablewarmwarmhotvery cold
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Idlib, Syria (6,618 miles away); Shiraz, Iran (7,502 miles); and Maymana, Afghanistan (7,399 miles) are the far-away foreign places with temperatures most similar to Arkadelphia (view comparison).

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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 5.0 months, ending around November 9.

The clearest month of the year in Arkadelphia is September, during which on average the sky is clear, mostly clear, or partly cloudy 68% of the time.

The cloudier part of the year begins around November 9 and lasts for 7.0 months, ending around June 8.

The cloudiest month of the year in Arkadelphia is February, during which on average the sky is overcast or mostly cloudy 50% of the time.

Cloud Cover Categories in Arkadelphia

Cloud Cover Categories in ArkadelphiaclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Oct 470%Oct 470%Jan 350%Jan 350%Jun 860%Jun 860%Nov 960%Nov 960%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.
FractionJanFebMarAprMayJunJulAugSepOctNovDec
Cloudier 50%50%46%41%43%38%34%32%32%33%42%48%
Clearer 50%50%54%59%57%62%66%68%68%67%58%52%

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 7 to July 13, with a greater than 32% chance of a given day being a wet day. The month with the most wet days in Arkadelphia is May, with an average of 12.2 days with at least 0.04 inches of precipitation.

The drier season lasts 8.8 months, from July 13 to April 7. The month with the fewest wet days in Arkadelphia is September, with an average of 7.2 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Arkadelphia is May, with an average of 12.2 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 41% on May 14.

Daily Chance of Precipitation in Arkadelphia

Daily Chance of Precipitation in ArkadelphiawetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%May 1441%May 1441%Sep 2822%Sep 2822%Apr 732%Apr 732%Jul 1332%Jul 1332%NowNowrainmixed
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).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain 6.3d7.2d9.4d10.2d12.2d10.4d9.7d8.5d7.2d7.9d8.3d7.6d
Mixed 0.7d0.5d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.1d0.5d
Snow 0.4d0.3d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.3d
Any 7.5d8.0d9.6d10.2d12.2d10.4d9.7d8.5d7.2d7.9d8.4d8.4d

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. Arkadelphia experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Arkadelphia. The month with the most rain in Arkadelphia is April, with an average rainfall of 4.8 inches.

The month with the least rain in Arkadelphia is August, with an average rainfall of 2.7 inches.

Average Monthly Rainfall in Arkadelphia

Average Monthly Rainfall in ArkadelphiaJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 inMay 25.0 inMay 25.0 inAug 232.7 inAug 232.7 inNov 265.0 inNov 265.0 inJan 243.3 inJan 243.3 inNowNow
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 snowfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Rainfall 3.3″3.8″4.5″4.8″4.8″3.6″3.1″2.7″3.2″4.3″4.8″4.4″

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. Arkadelphia experiences some seasonal variation in monthly snowfall.

The snowy period of the year lasts for 2.4 months, from December 10 to February 22, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Arkadelphia is January, with an average snowfall of 1.6 inches.

The snowless period of the year lasts for 9.6 months, from February 22 to December 10. The least snow falls around July 13, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Arkadelphia

Average Monthly Snowfall in ArkadelphiasnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 inJan 71.7 inJan 71.7 inJul 130.0 inJul 130.0 inDec 101.0 inDec 101.0 inFeb 221.0 inFeb 221.0 inNowNow
The average 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.
JanFebMarAprMayJunJulAugSepOctNovDec
Snowfall 1.6″1.2″0.2″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.1″1.3″

The length of the day in Arkadelphia varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 53 minutes of daylight; the longest day is June 20, with 14 hours, 26 minutes of daylight.

Hours of Daylight and Twilight in Arkadelphia

Hours of Daylight and Twilight in ArkadelphiaJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 1912 hr, 7 minMar 1914 hr, 26 minJun 2014 hr, 26 minJun 2012 hr, 10 minSep 2212 hr, 10 minSep 229 hr, 53 minDec 219 hr, 53 minDec 21nightnightdayNowNow
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.
Hours ofJanFebMarAprMayJunJulAugSepOctNovDec
Daylight 10.2h11.0h12.0h13.1h14.0h14.4h14.2h13.4h12.3h11.3h10.4h9.9h

The earliest sunrise is at 6:00 AM on June 12, and the latest sunrise is 1 hour, 33 minutes later at 7:33 AM on November 2. 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 2024, starting in the spring on March 10, lasting 7.8 months, and ending in the fall on November 3.

Sunrise & Sunset with Twilight and Daylight Saving Time in Arkadelphia

Sunrise & Sunset with Twilight and Daylight Saving Time in ArkadelphiaJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 126:00 AMJun 126:00 AM8:27 PMJun 298:27 PMJun 29Dec 45:02 PMDec 45:02 PM7:33 AMNov 27:33 AMNov 2Mar 10DSTMar 10DSTDSTNov 3DSTNov 3daynightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2024. 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.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in Arkadelphia

Solar Elevation and Azimuth in ArkadelphiaJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AM00010101010202020303030404040505060607000010101020202020303030404040505060703279NowNow
northeastsouthwest
Solar elevation and azimuth over the course of the year 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

Moon Rise, Set & Phases in Arkadelphia

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

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 extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 5.4 months, from April 25 to October 7, during which time the comfort level is muggy, oppressive, or miserable at least 24% of the time. The month with the most muggy days in Arkadelphia is July, with 29.1 days that are muggy or worse.

The month with the fewest muggy days in Arkadelphia is January, with 0.4 days that are muggy or worse.

Humidity Comfort Levels in Arkadelphia

Humidity Comfort Levels in ArkadelphiamuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 211%Jan 211%95%Jul 2295%Jul 22Apr 2524%Apr 2524%Oct 724%Oct 724%NowNowmiserablemiserableoppressiveoppressivedrydrymuggymuggyhumidhumidcomfortablecomfortable
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days 0.4d0.4d1.4d5.2d15.6d25.1d29.1d27.2d16.4d5.8d1.8d0.7d

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 experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 7.2 months, from October 14 to May 21, with average wind speeds of more than 4.1 miles per hour. The windiest month of the year in Arkadelphia is March, with an average hourly wind speed of 4.9 miles per hour.

The calmer time of year lasts for 4.8 months, from May 21 to October 14. The calmest month of the year in Arkadelphia is August, with an average hourly wind speed of 3.3 miles per hour.

Average Wind Speed in Arkadelphia

Average Wind Speed in ArkadelphiawindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mphMar 314.9 mphMar 314.9 mphJul 303.2 mphJul 303.2 mphOct 144.1 mphOct 144.1 mphMay 214.1 mphMay 214.1 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph) 4.44.64.94.84.23.63.33.33.74.14.34.3

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 19 and for 2.8 months, from September 30 to December 23, with a peak percentage of 49% on May 19. The wind is most often from the east for 1.4 months, from August 19 to September 30, with a peak percentage of 37% on September 5. The wind is most often from the north for 1.9 months, from December 23 to February 19, with a peak percentage of 30% on January 1.

Wind Direction in Arkadelphia

Wind Direction in ArkadelphiaNSESJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsoutheastnorth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

To characterize how pleasant the weather is in Arkadelphia throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit Arkadelphia for general outdoor tourist activities are from late April to mid June and from mid August to mid October, with a peak score in the third week of September.

Tourism Score in Arkadelphia

Tourism Score in Arkadelphiabest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.06.01.11.15.85.85.05.0NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationtourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Arkadelphia for hot-weather activities is from late May to mid September, with a peak score in the last week of August.

Beach/Pool Score in Arkadelphia

Beach/Pool Score in Arkadelphiabest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.75.70.10.15.65.6NowNow cloudscloudsprecipitationprecipitationbeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Arkadelphia typically lasts for 7.6 months (232 days), from around March 18 to around November 4, rarely starting before February 28 or after April 7, and rarely ending before October 16 or after November 26.

Time Spent in Various Temperature Bands and the Growing Season in Arkadelphia

Time Spent in Various Temperature Bands and the Growing Season in Arkadelphiagrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Mar 1850%Mar 1850%Nov 450%Nov 490%Apr 790%Apr 790%Oct 1690%Oct 1610%Feb 2810%Feb 2810%Nov 2610%Nov 260%Jan 220%Jan 22Jul 11100%Jul 11100%very coldcoldcoolcomfortablewarmhotfreezingsweltering
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms in Arkadelphia should appear around February 9, only rarely appearing before January 25 or after February 25.

Growing Degree Days in Arkadelphia

Growing Degree Days in ArkadelphiaJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F1,000°F1,000°F2,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°FFeb 988°FFeb 988°FMay 4900°FMay 4900°FJun 121,800°FJun 121,800°FDec 315,537°FDec 315,537°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

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 11 to August 30, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest month of the year in Arkadelphia is June, with an average of 6.7 kWh.

The darker period of the year lasts for 2.9 months, from November 9 to February 6, with an average daily incident shortwave energy per square meter below 3.3 kWh. The darkest month of the year in Arkadelphia is December, with an average of 2.6 kWh.

Average Daily Incident Shortwave Solar Energy in Arkadelphia

Average Daily Incident Shortwave Solar Energy in ArkadelphiabrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 156.8 kWhJun 156.8 kWhDec 222.5 kWhDec 222.5 kWhApr 115.9 kWhApr 115.9 kWhAug 305.9 kWhAug 305.9 kWhFeb 63.3 kWhFeb 63.3 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Solar Energy (kWh) 2.83.74.86.06.46.76.76.35.44.33.22.6

For the purposes of this report, the geographical coordinates of Arkadelphia are 34.121 deg latitude, -93.054 deg longitude, and 243 ft elevation.

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 only modest variations in elevation (522 feet). Within 50 miles contains significant 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%).

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:

To get a sense of how much these sources agree with each other, you can view a comparison of Arkadelphia and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

Please review our full terms contained on our Terms of Service page.