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Average Weather in Mountain View Arkansas, United States

In Mountain View, the summers are hot and muggy; the winters are short, very cold, and wet; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 30°F to 90°F and is rarely below 16°F or above 98°F.

Climate Summary

coldcoolwarmhotwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDec70%70%50%50%clearovercastprecipitation: 4.7 inprecipitation: 4.7 in2.5 in2.5 inmuggy: 81%muggy: 81%0%0%drydrytourism score: 6.3tourism score: 6.30.70.7
Click on each chart for more information.

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

Temperature

The hot season lasts for 3.6 months, from June 1 to September 18, with an average daily high temperature above 81°F. The hottest day of the year is July 22, with an average high of 90°F and low of 70°F.

The cold season lasts for 2.9 months, from November 26 to February 24, with an average daily high temperature below 56°F. The coldest day of the year is January 22, with an average low of 30°F and high of 48°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 Mountain ViewJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMvery coldvery coldcoldcoldcoolcoolcomfortablewarmhotvery coldfreezing
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.

Polýkastro, Greece (5,713 miles away) and Saloğlu, Azerbaijan (6,472 miles) are the far-away foreign places with temperatures most similar to Mountain View (view comparison).

Clouds

In Mountain View, 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 Mountain View begins around June 12 and lasts for 4.7 months, ending around November 2. On August 22, 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 2 and lasts for 7.3 months, ending around June 12. On December 27, 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 Categories

Cloud Cover Categories in Mountain ViewclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 2270%Aug 2270%Dec 2750%Dec 2750%Jun 1260%Jun 1260%Nov 260%Nov 260%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 Mountain View varies throughout the year.

The wetter season lasts 5.2 months, from March 15 to August 20, with a greater than 29% chance of a given day being a wet day. The chance of a wet day peaks at 38% on May 15.

The drier season lasts 6.8 months, from August 20 to March 15. The smallest chance of a wet day is 20% 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 38% on May 15.

Daily Chance of Precipitation

Daily Chance of Precipitation in Mountain ViewwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%May 1538%May 1538%Jan 1220%Jan 1220%Jan 121%Jan 121%Mar 1529%Mar 1529%Aug 2029%Aug 2029%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. Mountain View experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Mountain View. The most rain falls during the 31 days centered around May 1, with an average total accumulation of 4.7 inches.

The least rain falls around January 25, with an average total accumulation of 2.4 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

We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.

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

The snowy period of the year lasts for 3.7 months, from November 30 to March 19, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around February 5, with an average total liquid-equivalent accumulation of 0.3 inches.

The snowless period of the year lasts for 8.3 months, from March 19 to November 30. The least snow falls around July 15, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall in Mountain ViewsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in1 in2 in3 in4 in5 inFeb 50.3 inFeb 50.3 inJul 150.0 inJul 150.0 inNov 300.1 inNov 300.1 inMar 190.1 inMar 190.1 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 Mountain View 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, 36 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in Mountain ViewJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2014 hr, 36 minJun 2014 hr, 36 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 5:51 AM on June 12, and the latest sunrise is 1 hour, 42 minutes later at 7:34 AM on November 4. The earliest sunset is at 4:54 PM on December 5, and the latest sunset is 3 hours, 35 minutes later at 8:28 PM on June 28.

Daylight saving time (DST) is observed in Mountain View 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 Mountain ViewJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 125:51 AMJun 125:51 AM8:28 PMJun 288:28 PMJun 28Dec 54:54 PMDec 54:54 PM7:34 AMNov 47:34 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.

Mountain View experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 4.3 months, from May 16 to September 25, during which time the comfort level is muggy, oppressive, or miserable at least 20% of the time. The muggiest day of the year is July 23, with muggy conditions 81% of the time.

The least muggy day of the year is December 27, when muggy conditions are essentially unheard of.

Humidity Comfort Levels

Humidity Comfort Levels in Mountain ViewmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Dec 270%Dec 270%81%Jul 2381%Jul 23May 1620%May 1620%Sep 2520%Sep 2520%oppressiveoppressivemuggymuggyhumidhumiddrydrycomfortablecomfortablemiserablemiserable
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 Mountain View experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 6.6 months, from October 25 to May 12, with average wind speeds of more than 4.6 miles per hour. The windiest day of the year is February 26, with an average hourly wind speed of 6.0 miles per hour.

The calmer time of year lasts for 5.4 months, from May 12 to October 25. The calmest day of the year is July 30, with an average hourly wind speed of 3.3 miles per hour.

Average Wind Speed

Average Wind Speed in Mountain ViewwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mph8 mph9 mphFeb 266.0 mphFeb 266.0 mphJul 303.3 mphJul 303.3 mphOct 254.6 mphOct 254.6 mphMay 124.6 mphMay 124.6 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 Mountain View varies throughout the year.

The wind is most often from the south for 9.9 months, from February 26 to December 24, with a peak percentage of 49% on June 7. The wind is most often from the north for 2.1 months, from December 24 to February 26, with a peak percentage of 32% on January 1.

Wind Direction

Wind Direction in Mountain ViewNSJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%southnorthwesteast
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 Mountain View 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 Mountain View 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 Mountain Viewbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.36.30.70.76.16.1 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 Mountain View for hot-weather activities is from mid June to early September, with a peak score in the second week of July.

Beach/Pool Score

Beach/Pool Score in Mountain Viewbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.16.10.00.0 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 Mountain View typically lasts for 7.1 months (217 days), from around April 1 to around November 4, rarely starting before March 9 or after April 20, and rarely ending before October 15 or after November 26.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Mountain Viewgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 150%Apr 150%Nov 450%Nov 490%Apr 2090%Apr 2090%Oct 1590%Oct 1510%Mar 910%Mar 910%Nov 2610%Nov 260%Dec 280%Dec 28Jul 15100%Jul 15100%freezingvery coldcoldcomfortablewarmhotcoolfrigidsweltering
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 Mountain View should appear around February 26, only rarely appearing before February 10 or after March 14.

Growing Degree Days

Growing Degree Days in Mountain ViewJanFebMarAprMayJunJulAugSepOctNovDec0°F500°F1,000°F1,500°F2,000°F2,500°F3,000°F3,500°F4,000°F4,500°FFeb 2686°FFeb 2686°FMay 21900°FMay 21900°FJun 291,800°FJun 291,800°FDec 314,648°FDec 314,648°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 4.3 months, from April 19 to August 30, with an average daily incident shortwave energy per square meter above 6.0 kWh. The brightest day of the year is July 11, with an average of 6.9 kWh.

The darker period of the year lasts for 3.0 months, from November 8 to February 7, 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 Mountain ViewbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWhJul 116.9 kWhJul 116.9 kWhDec 232.4 kWhDec 232.4 kWhApr 196.0 kWhApr 196.0 kWhAug 306.0 kWhAug 306.0 kWhNov 83.3 kWhNov 83.3 kWhFeb 73.3 kWhFeb 73.3 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 Mountain View are 35.868 deg latitude, -92.118 deg longitude, and 705 ft elevation.

The topography within 2 miles of Mountain View contains very significant variations in elevation, with a maximum elevation change of 915 feet and an average elevation above sea level of 780 feet. Within 10 miles also contains very significant variations in elevation (1,339 feet). Within 50 miles contains very significant variations in elevation (2,060 feet).

The area within 2 miles of Mountain View is covered by cropland (45%) and trees (43%), within 10 miles by trees (88%) and cropland (12%), and within 50 miles by trees (66%) and cropland (31%).

Data Sources

This report illustrates the typical weather in Mountain View, 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 Mountain View.

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

The stations contributing to this reconstruction are: Clinton Municipal Airport (33%, 42 kilometers, southwest); Batesville Regional Airport (30%, 45 kilometers, east); Marion County Regional Airport (19%, 63 kilometers, northwest); and Ozark Regional Airport (18%, 64 kilometers, northwest).

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.