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April Weather in Roby Texas, United States

Daily high temperatures increase by 8°F, from 76°F to 83°F, rarely falling below 61°F or exceeding 93°F.

Daily low temperatures increase by 8°F, from 50°F to 59°F, rarely falling below 37°F or exceeding 68°F.

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.

Average High and Low Temperature in April in Roby

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 hourly average temperatures for the quarter of the year centered on April. 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.

Average Hourly Temperature in April in Roby

Average Hourly Temperature in April in RobyApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMMarMayNowNowcoldcoldcoolcomfortablewarmhotvery 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.

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 month of April in Roby experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 31% throughout the month.

The clearest day of the month is April 28, with clear, mostly clear, or partly cloudy conditions 71% 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%.

Cloud Cover Categories in April in Roby

Cloud Cover Categories in April in RobyApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MarMayApr 167%Apr 167%Apr 3071%Apr 3071%Apr 1169%Apr 1169%Apr 2170%Apr 2170%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.

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 April is very rapidly increasing, starting the month at 14% 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.

Probability of Precipitation in April in Roby

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 month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during April in Roby is increasing, starting the month at 1.2 inches, when it rarely exceeds 3.0 inches or falls below 0.2 inches, and ending the month at 2.1 inches, when it rarely exceeds 4.8 inches or falls below 0.5 inches.

Average Monthly Rainfall in April in Roby

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.

Over the course of April in Roby, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 55 minutes, implying an average daily increase of 1 minute, 53 seconds, and weekly increase of 13 minutes, 14 seconds.

The shortest day of the month is April 1, with 12 hours, 33 minutes of daylight and the longest day is April 30, with 13 hours, 28 minutes of daylight.

Hours of Daylight and Twilight in April in Roby

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 latest sunrise of the month in Roby is 7:28 AM on April 1 and the earliest sunrise is 34 minutes earlier at 6:54 AM on April 30.

The earliest sunset is 8:02 PM on April 1 and the latest sunset is 21 minutes later at 8:22 PM on April 30.

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

Sunrise & Sunset with Twilight and Daylight Saving Time in April in Roby

Sunrise & Sunset with Twilight and Daylight Saving Time in April in RobyApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMMarMay6:54 AM6:54 AMApr 308:22 PMApr 308:22 PM7:28 AM7:28 AMApr 18:02 PMApr 18:02 PM7:16 AM7:16 AMApr 118:09 PMApr 118:09 PMSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of April. 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 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 April in Roby

Solar Elevation and Azimuth in April in RobyApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 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 AMMarMay001010202020303040405050506060700001010202030303040405050606070NowNow
northeastsouthwest
Solar elevation and azimuth over the course of April 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 April 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.

Moon Rise, Set & Phases in April in Roby

Moon Rise, Set & Phases in April in RobyApr11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMMarMayMar 104:01 AMMar 104:01 AMMar 252:01 AMMar 252:01 AMApr 81:22 PMApr 81:22 PMApr 236:50 PMApr 236:50 PMMay 710:23 PMMay 710:23 PMMay 238:54 AMMay 238:54 AM8:16 AM8:16 AM8:26 PM8:26 PM7:37 PM7:37 PM7:51 AM7:51 AM7:14 AM7:14 AM8:23 PM8:23 PM8:19 PM8:19 PM7:13 AM7:13 AM6:16 AM6:16 AM8:22 PM8:22 PM8:10 PM8:10 PM6:22 AM6:22 AM
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.
Apr 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
50%2:31 AMSE12:10 PMSW-7:20 AMS237,614 mi
2
46%3:27 AMESE1:15 PMWSW-8:21 AMS234,248 mi
3
34%4:16 AMESE2:24 PMWSW-9:21 AMS230,884 mi
4
23%4:59 AMESE3:36 PMWSW-10:18 AMS227,784 mi
5
14%5:37 AMESE4:48 PMWSW-11:12 AMS225,249 mi
6
6%6:10 AME6:00 PMW-12:04 PMS223,571 mi
7
2%6:42 AME7:11 PMW-12:55 PMS222,980 mi
8
0%7:14 AME8:23 PMWNW-1:45 PMS223,594 mi
9
2%7:47 AMENE9:35 PMWNW-2:37 PMS225,393 mi
10
6%8:23 AMENE10:48 PMWNW-3:31 PMS228,208 mi
11
13%9:04 AMENE11:58 PMWNW-4:28 PMS231,759 mi
12
22%9:51 AMENE--5:26 PMS235,700 mi
13
32%-1:05 AMNW10:45 AMNE6:25 PMS239,674 mi
14
42%-2:04 AMNW11:43 AMNE7:21 PMS243,368 mi
15
50%-2:54 AMWNW12:44 PMENE8:13 PMS246,539 mi
16
63%-3:36 AMWNW1:45 PMENE9:01 PMS249,033 mi
17
72%-4:11 AMWNW2:44 PMENE9:45 PMS250,775 mi
18
80%-4:41 AMWNW3:41 PMENE10:27 PMS251,762 mi
19
87%-5:07 AMWNW4:37 PME11:06 PMS252,041 mi
20
93%-5:32 AMW5:31 PME11:45 PMS251,695 mi
21
95%-5:55 AMW6:26 PME--
22
97%-6:19 AMW7:21 PME12:23 AMS250,828 mi
23
100%-6:45 AMWSW8:19 PMESE1:04 AMS249,543 mi
24
100%-7:13 AMWSW9:19 PMESE1:46 AMS247,934 mi
25
98%-7:46 AMWSW10:21 PMESE2:32 AMS246,078 mi
26
95%-8:24 AMWSW11:24 PMESE3:22 AMS244,027 mi
27
89%-9:10 AMWSW-4:17 AMS241,813 mi
28
81%12:25 AMSE10:04 AMSW-5:15 AMS239,460 mi
29
72%1:23 AMSE11:06 AMWSW-6:14 AMS236,997 mi
30
61%2:13 AMESE12:13 PMWSW-7:14 AMS234,477 mi

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 April, rising from 1% to 6% over the course of the month.

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.

Humidity Comfort Levels in April in Roby

Humidity Comfort Levels in April in RobyApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%MarMayApr 11%Apr 11%Apr 306%Apr 306%Apr 111%Apr 111%Apr 213%Apr 213%NowNowmuggymuggyhumidhumiddrydrycomfortablecomfortable
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.

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 gradually decreasing during April, decreasing from 12.6 miles per hour to 12.1 miles per hour over the course of the month.

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 highest daily average wind speed during April is 12.6 miles per hour on April 1.

Average Wind Speed in April in Roby

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction in Roby throughout April is predominantly from the south, with a peak proportion of 50% on April 30.

Wind Direction in April in Roby

Wind Direction in April in RobyApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%MarMayNowNowwestsouthnortheast
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).

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 month of April in Roby is more likely than not fully within the growing season, with the chance that a given day is in the growing season increasing from 85% to 100% over the course of the month.

Time Spent in Various Temperature Bands and the Growing Season in April in Roby

Time Spent in Various Temperature Bands and the Growing Season in April in Robygrowing seasonApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%MarMay85%Apr 185%Apr 1100%Apr 30100%Apr 3095%Apr 1195%Apr 1199%Apr 2199%Apr 2150%Mar 1550%Mar 15NowNowvery coldcoldcoolcomfortablewarmhotfreezing
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.

The average accumulated growing degree days in Roby are rapidly increasing during April, increasing by 457°F, from 526°F to 983°F, over the course of the month.

Growing Degree Days in April in Roby

Growing Degree Days in April in RobyApr112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030400°F400°F500°F500°F600°F600°F700°F700°F800°F800°F900°F900°F1,000°F1,000°F1,100°F1,100°F1,200°F1,200°FMarMayApr 1526°FApr 1526°FApr 30983°FApr 30983°FApr 11662°FApr 11662°FApr 21820°FApr 21820°FNowNow
The average growing degree days accumulated over the course of April, 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 in Roby is gradually increasing during April, rising by 0.7 kWh, from 6.3 kWh to 7.0 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in April in Roby

Average Daily Incident Shortwave Solar Energy in April in RobyApr1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhMarMayApr 16.3 kWhApr 16.3 kWhApr 307.0 kWhApr 307.0 kWhApr 116.7 kWhApr 116.7 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.

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%).

This report illustrates the typical weather in Roby, 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 Roby.

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

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