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Average Weather in Farmington Arkansas, United States

In Farmington, the summers are hot and muggy, the winters are very cold, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 28°F to 90°F and is rarely below 13°F or above 97°F.

Climate Summary

coldcoolcomfortablewarmhotwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDec70%70%49%49%clearovercastprecipitation: 4.9 inprecipitation: 4.9 in2.0 in2.0 inmuggy: 76%muggy: 76%0%0%drydrytourism score: 6.2tourism score: 6.20.70.7
Click on each chart for more information.

Based on the tourism score, the best time of year to visit Farmington for warm-weather activities is from mid May to early October.

Temperature

The hot season lasts for 3.3 months, from June 5 to September 15, with an average daily high temperature above 81°F. The hottest day of the year is July 26, with an average high of 90°F and low of 70°F.

The cold season lasts for 3.0 months, from November 26 to February 25, with an average daily high temperature below 55°F. The coldest day of the year is January 6, with an average low of 28°F and high of 47°F.

Average High and Low Temperature

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.

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

Average Hourly Temperature in FarmingtonJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMvery coldvery coldcoldcoldcoolcoolcomfortablewarmhotfreezing
The average hourly temperature, color coded into bands: 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 shaded overlays indicate night and civil twilight.

Axioúpoli, Greece (5,785 miles away) and Gardabani, Georgia (6,503 miles) are the far-away foreign places with temperatures most similar to Farmington (view comparison).

Clouds

In Farmington, 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 Farmington begins around June 11 and lasts for 4.8 months, ending around November 4. 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 4 and lasts for 7.2 months, ending around June 11. On February 11, the cloudiest day of the year, the sky is overcast or mostly cloudy 51% of the time, and clear, mostly clear, or partly cloudy 49% of the time.

Cloud Cover Categories

Cloud Cover Categories in FarmingtonclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Oct 570%Oct 570%Feb 1149%Feb 1149%Jun 1160%Jun 1160%Nov 460%Nov 460%clearmostly clearpartly cloudymostly cloudyovercast
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 Farmington varies throughout the year.

The wetter season lasts 4.3 months, from March 27 to August 6, with a greater than 29% chance of a given day being a wet day. The chance of a wet day peaks at 44% on May 27.

The drier season lasts 7.7 months, from August 6 to March 27. The smallest chance of a wet day is 15% on January 13.

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 May 27.

Daily Chance of Precipitation

Daily Chance of Precipitation in FarmingtonwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%May 2744%May 2744%Jan 1315%Jan 1315%Jan 117%Jan 117%Mar 2730%Mar 2730%Aug 629%Aug 629%rainsnow
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 of the year. Farmington experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Farmington. The most rain falls during the 31 days centered around May 13, with an average total accumulation of 4.9 inches.

The least rain falls around January 24, with an average total accumulation of 1.8 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 Farmington 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

Average Liquid-Equivalent Monthly Snowfall in FarmingtonsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in1 in2 in3 in4 in5 inJan 290.2 inJan 290.2 inJul 310.0 inJul 310.0 inDec 10.1 inDec 10.1 inMar 140.1 inMar 140.1 in
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.

Sun

The length of the day in Farmington varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 43 minutes of daylight; the longest day is June 20, with 14 hours, 37 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in FarmingtonJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2014 hr, 37 minJun 2014 hr, 37 minJun 2012 hr, 8 minSep 2212 hr, 8 minSep 229 hr, 43 minDec 219 hr, 43 minDec 21nightnightday
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 5:59 AM on June 13, and the latest sunrise is 1 hour, 43 minutes later at 7:42 AM on November 4. The earliest sunset is at 5:02 PM on December 5, and the latest sunset is 3 hours, 35 minutes later at 8:37 PM on June 28.

Daylight saving time (DST) is observed in Farmington 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

Sunrise & Sunset with Twilight and Daylight Saving Time in FarmingtonJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 135:59 AMJun 135:59 AM8:37 PMJun 288:37 PMJun 28Dec 55:02 PMDec 55:02 PM7:42 AMNov 47:42 AMNov 4Mar 12DSTMar 12DSTDSTNov 5DSTNov 5daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
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.

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.

Farmington experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 4.2 months, from May 19 to September 25, during which time the comfort level is muggy, oppressive, or miserable at least 19% of the time. The muggiest day of the year is July 23, with muggy conditions 76% of the time.

The least muggy day of the year is February 6, when muggy conditions are essentially unheard of.

Humidity Comfort Levels

Humidity Comfort Levels in FarmingtonmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Feb 60%Feb 60%76%Jul 2376%Jul 23May 1919%May 1919%Sep 2519%Sep 2519%oppressiveoppressivemuggymuggyhumidhumiddrydrycomfortablecomfortable
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 Farmington experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.8 months, from October 21 to May 15, with average wind speeds of more than 5.6 miles per hour. The windiest day of the year is March 10, with an average hourly wind speed of 7.1 miles per hour.

The calmer time of year lasts for 5.2 months, from May 15 to October 21. The calmest day of the year is August 3, with an average hourly wind speed of 4.1 miles per hour.

Average Wind Speed

Average Wind Speed in FarmingtonwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mph8 mph9 mph10 mph11 mphMar 107.1 mphMar 107.1 mphAug 34.1 mphAug 34.1 mphOct 215.6 mphOct 215.6 mphMay 155.6 mphMay 155.6 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 Farmington is from the south throughout the year.

Wind Direction

Wind Direction in FarmingtonJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%southnortheastwest
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).

Best Time of Year to Visit

To characterize how pleasant the weather is in Farmington 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 time of year to visit Farmington for general outdoor tourist activities is from mid May to early October, with a peak score in the first week of September.

Tourism Score

Tourism Score in Farmingtonbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.26.20.70.76.16.1 precipitationprecipitationcloudscloudstemperaturetemperaturetourism 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 Farmington for hot-weather activities is from mid June to late August, with a peak score in the second week of July.

Beach/Pool Score

Beach/Pool Score in Farmingtonbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.26.20.00.0 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/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.

Growing Season

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 Farmington typically lasts for 6.7 months (205 days), from around April 7 to around October 29, rarely starting before March 16 or after April 25, and rarely ending before October 12 or after November 16.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Farmingtongrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 750%Apr 750%Oct 2950%Oct 2990%Apr 2590%Apr 2590%Oct 1290%Oct 1210%Mar 1610%Mar 1610%Nov 1610%Nov 160%Jan 260%Jan 26Jul 18100%Jul 18100%freezingvery coldcoldcomfortablewarmhotcool
The percentage of time spent in various temperature bands: 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 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 Farmington should appear around February 27, only rarely appearing before February 10 or after March 17.

Growing Degree Days

Growing Degree Days in FarmingtonJanFebMarAprMayJunJulAugSepOctNovDec0°F500°F1,000°F1,500°F2,000°F2,500°F3,000°F3,500°F4,000°F4,500°FFeb 2787°FFeb 2787°FMay 24900°FMay 24900°FJul 21,800°FJul 21,800°FDec 314,540°FDec 314,540°F
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

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 4.0 months, from April 28 to August 28, with an average daily incident shortwave energy per square meter above 6.1 kWh. The brightest day of the year is July 9, with an average of 7.0 kWh.

The darker period of the year lasts for 3.0 months, from November 7 to February 8, 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 2.4 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in FarmingtonbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWhJul 97.0 kWhJul 97.0 kWhDec 232.4 kWhDec 232.4 kWhApr 286.1 kWhApr 286.1 kWhAug 286.1 kWhAug 286.1 kWhNov 73.3 kWhNov 73.3 kWhFeb 83.3 kWhFeb 83.3 kWh
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 Farmington are 36.042 deg latitude, -94.247 deg longitude, and 1,227 ft elevation.

The topography within 2 miles of Farmington contains significant variations in elevation, with a maximum elevation change of 646 feet and an average elevation above sea level of 1,237 feet. Within 10 miles contains significant variations in elevation (1,030 feet). Within 50 miles contains very significant variations in elevation (2,238 feet).

The area within 2 miles of Farmington is covered by cropland (78%) and trees (14%), within 10 miles by cropland (55%) and trees (34%), and within 50 miles by trees (59%) and cropland (37%).

Data Sources

This report illustrates the typical weather in Farmington, 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Farmington.

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

The stations contributing to this reconstruction are: Drake Field (62%, 8 kilometers, southeast); Springdale Municipal Airport (17%, 18 kilometers, northeast); Northwest Arkansas Regional Airport (10%, 27 kilometers, north); Smith Field (10%, 27 kilometers, northwest); and Sallisaw Municipal Airport (1.7%, 84 kilometers, southwest).

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 .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

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.