Summer Weather in Roby United States

Daily high temperatures are around 93°F, rarely falling below 80°F or exceeding 102°F. The highest daily average high temperature is 96°F on July 25.

Daily low temperatures are around 71°F, rarely falling below 60°F or exceeding 79°F. The highest daily average low temperature is 74°F on July 24.

For reference, on July 22, the hottest day of the year, temperatures in Roby typically range from 74°F to 96°F, while on January 4, the coldest day of the year, they range from 35°F to 56°F.

The figure below shows you a compact characterization of the hourly average summer temperatures. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Messaad, Algeria (5,682 miles away) and Hacıpaşa, Turkey (6,929 miles) are the far-away foreign places with temperatures most similar to Roby (view comparison).

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The summer in Roby experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 28% throughout the season. The highest chance of overcast or mostly cloudy conditions is 31% on August 11. The lowest chance of overcast or mostly cloudy conditions is 24% on June 10.

The clearest day of the summer is June 10, with clear, mostly clear, or partly cloudy conditions 76% of the time.

For reference, on February 24, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 42%, while on June 10, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 76%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Roby, the chance of a wet day over the course of the summer is very rapidly decreasing, starting the season at 34% and ending it at 24%.

For reference, the year's highest daily chance of a wet day is 35% on May 26, and its lowest chance is 6% on January 11.

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the summer in Roby is decreasing, starting the season at 3.1 inches, when it rarely exceeds 5.6 inches or falls below 0.9 inches, and ending the season at 2.1 inches, when it rarely exceeds 4.6 inches or falls below 0.4 inches.

The lowest average 31-day accumulation is 1.6 inches on July 19.

Over the course of the summer in Roby, the length of the day is rapidly decreasing. From the start to the end of the season, the length of the day decreases by 1 hour, 20 minutes, implying an average daily decrease of 53 seconds, and weekly decrease of 6 minutes, 9 seconds.

The shortest day of the summer is August 31, with 12 hours, 51 minutes of daylight and the longest day is June 20, with 14 hours, 19 minutes of daylight.

The earliest sunrise of the summer in Roby is 6:33 AM on June 11 and the latest sunrise is 43 minutes later at 7:15 AM on August 31.

The latest sunset is 8:53 PM on June 29 and the earliest sunset is 47 minutes earlier at 8:06 PM on August 31.

Daylight saving time is observed in Roby during 2024, but it neither starts nor ends during the summer, so the entire season is in standard time.

For reference, on June 20, the longest day of the year, the Sun rises at 6:33 AM and sets 14 hours, 19 minutes later, at 8:52 PM, while on December 21, the shortest day of the year, it rises at 7:40 AM and sets 10 hours, 0 minutes later, at 5:39 PM.

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.

The figure below presents a compact representation of key lunar data for the summer of 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

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.

The chance that a given day will be muggy in Roby is gradually increasing during the summer, rising from 27% to 31% over the course of the season.

The highest chance of a muggy day during the summer is 42% on June 22.

For reference, on June 22, the muggiest day of the year, there are muggy conditions 42% of the time, while on December 12, the least muggy day of the year, there are muggy conditions 0% of the time.

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 Roby is rapidly decreasing during the summer, decreasing from 11.5 miles per hour to 9.3 miles per hour over the course of the season.

For reference, on April 1, the windiest day of the year, the daily average wind speed is 12.6 miles per hour, while on August 22, the calmest day of the year, the daily average wind speed is 9.2 miles per hour.

The lowest daily average wind speed during the summer is 9.2 miles per hour on August 22.

The hourly average wind direction in Roby throughout the summer is predominantly from the south, with a peak proportion of 76% on July 13.

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 Roby typically lasts for 8.0 months (247 days), from around March 15 to around November 17, rarely starting before February 22 or after April 5, and rarely ending before October 28 or after December 5.

The summer in Roby is reliably fully 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.

The average accumulated growing degree days in Roby are very rapidly increasing during the summer, increasing by 2,745°F, from 1,712°F to 4,457°F, over the course of the season.

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 in Roby is decreasing during the summer, falling by 1.1 kWh, from 7.2 kWh to 6.1 kWh, over the course of the season.

The highest average daily incident shortwave solar energy during the summer is 7.4 kWh on July 4.

For the purposes of this report, the geographical coordinates of Roby are 32.745 deg latitude, -100.378 deg longitude, and 1,962 ft elevation.

The topography within 2 miles of Roby contains only modest variations in elevation, with a maximum elevation change of 115 feet and an average elevation above sea level of 1,949 feet. Within 10 miles also contains only modest variations in elevation (449 feet). Within 50 miles contains only modest variations in elevation (1,427 feet).

The area within 2 miles of Roby is covered by cropland (66%) and shrubs (26%), within 10 miles by cropland (51%) and shrubs (36%), and within 50 miles by shrubs (54%) and cropland (26%).