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Spring Weather in Allen United States

Daily high temperatures increase by 22°F, from 65°F to 87°F, rarely falling below 50°F or exceeding 93°F.

Daily low temperatures increase by 24°F, from 44°F to 68°F, rarely falling below 32°F or exceeding 74°F.

For reference, on July 31, the hottest day of the year, temperatures in Allen typically range from 75°F to 95°F, while on January 5, the coldest day of the year, they range from 36°F to 55°F.

Average High and Low Temperature in the Spring in Allen

Average High and Low Temperature in the Spring in AllenMarAprMay20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FWinterSummerMar 165°FMar 165°F44°F44°FMay 3187°FMay 3187°F68°F68°FApr 172°FApr 172°F52°F52°FMay 179°FMay 179°F60°F60°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.

The figure below shows you a compact characterization of the hourly average spring 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.

Average Hourly Temperature in the Spring in Allen

Average Hourly Temperature in the Spring in AllenMarAprMay12 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 AMWinterSummerNowNowvery coldcoldcoolcomfortablewarmwarmhot
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.

Ar Rudayyif, Tunisia (5,702 miles away) and Açıkdere, Turkey (6,772 miles) are the far-away foreign places with temperatures most similar to Allen (view comparison).

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© OpenStreetMap contributors

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The spring in Allen experiences decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 45% to 35%.

The clearest day of the spring is April 19, with clear, mostly clear, or partly cloudy conditions 65% of the time.

For reference, on February 24, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 46%, while on October 4, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 74%.

Cloud Cover Categories in the Spring in Allen

Cloud Cover Categories in the Spring in AllenMarAprMay0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%WinterSummerMar 155%Mar 155%May 3165%May 3165%Apr 163%Apr 163%May 163%May 163%NowNowclearmostly clearpartly 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 Allen, the chance of a wet day over the course of the spring is very rapidly increasing, starting the season at 21% and ending it at 38%.

For reference, the year's highest daily chance of a wet day is 38% on May 31, and its lowest chance is 16% on December 31.

Probability of Precipitation in the Spring in Allen

Probability of Precipitation in the Spring in AllenMarAprMay0%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%40%40%WinterSummerMay 3138%May 3138%Mar 121%Mar 121%Apr 126%Apr 126%May 135%May 135%NowNowrainsnow
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 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 spring in Allen is rapidly increasing, starting the season at 2.8 inches, when it rarely exceeds 5.0 inches or falls below 0.6 inches, and ending the season at 4.1 inches, when it rarely exceeds 7.8 inches or falls below 1.7 inches.

The highest average 31-day accumulation is 4.4 inches on May 16.

Average Monthly Rainfall in the Spring in Allen

Average Monthly Rainfall in the Spring in AllenMarAprMay0 in0 in2 in2 in4 in4 in6 in6 in8 in8 inWinterSummerMay 154.4 inMay 154.4 inMar 12.8 inMar 12.8 inMay 314.1 inMay 314.1 inApr 12.9 inApr 12.9 inMay 14.1 inMay 14.1 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.

Over the course of the spring in Allen, the length of the day is very rapidly increasing. From the start to the end of the season, the length of the day increases by 2 hours, 41 minutes, implying an average daily increase of 1 minute, 46 seconds, and weekly increase of 12 minutes, 25 seconds.

The shortest day of the spring is March 1, with 11 hours, 30 minutes of daylight and the longest day is May 31, with 14 hours, 12 minutes of daylight.

Hours of Daylight and Twilight in the Spring in Allen

Hours of Daylight and Twilight in the Spring in AllenMarAprMay0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrWinterSummerMar 1912 hr, 7 minMar 1912 hr, 7 minnightnightdaydayMay 3114 hr, 12 minMay 3114 hr, 12 minMay 113 hr, 31 minMay 113 hr, 31 min
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 spring in Allen is 7:42 AM on March 10 and the earliest sunrise is 1 hour, 24 minutes earlier at 6:18 AM on May 31.

The earliest sunset is 6:24 PM on March 1 and the latest sunset is 2 hours, 6 minutes later at 8:30 PM on May 31.

Daylight saving time (DST) ends at 3:00 AM on March 10, 2024, shifting sunrise and sunset to be an hour earlier.

For reference, on June 20, the longest day of the year, the Sun rises at 6:18 AM and sets 14 hours, 21 minutes later, at 8:38 PM, while on December 21, the shortest day of the year, it rises at 7:26 AM and sets 9 hours, 58 minutes later, at 5:24 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in the Spring in Allen

Sunrise & Sunset with Twilight and Daylight Saving Time in the Spring in AllenMarAprMay2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMWinterSummer6:18 AM6:18 AMMay 318:30 PMMay 318:30 PM6:53 AM6:53 AMMar 16:24 PMMar 16:24 PM7:13 AM7:13 AMApr 17:47 PMApr 17:47 PM6:38 AM6:38 AMMay 18:09 PMMay 18:09 PMMar 10DSTMar 10DSTSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day in the spring. 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 the Spring in Allen

Solar Elevation and Azimuth in the Spring in AllenMarAprMay12 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 AMWinterSummer0010203030405060800101020304040506070NowNow
northeastsouthwest
Solar elevation and azimuth in the the spring of 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 the spring 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.

Moon Rise, Set & Phases in the Spring in Allen

Moon Rise, Set & Phases in the Spring in AllenMarAprMay12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMWinterSummerFeb 95:00 PMFeb 95:00 PMFeb 246:31 AMFeb 246:31 AMMar 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 AMJun 67:38 AMJun 67:38 AMJun 218:09 PMJun 218:09 PM7:21 AM7:21 AM5:58 PM5:58 PM5:42 PM5:42 PM7:19 AM7:19 AM8:01 AM8:01 AM8:11 PM8:11 PM7:22 PM7:22 PM7:36 AM7:36 AM6:58 AM6:58 AM8:07 PM8:07 PM8:04 PM8:04 PM6:57 AM6:57 AM8:07 PM8:07 PM7:56 PM7:56 PM6:06 AM6:06 AM6:01 AM6:01 AM9:17 PM9:17 PM8:53 PM8:53 PM6:31 AM6:31 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.

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 Allen is very rapidly increasing during the spring, rising from 1% to 63% over the course of the season.

For reference, on July 5, the muggiest day of the year, there are muggy conditions 86% of the time, while on January 21, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in the Spring in Allen

Humidity Comfort Levels in the Spring in AllenMarAprMay0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%WinterSummerMar 11%Mar 11%May 3163%May 3163%Apr 17%Apr 17%May 125%May 125%NowNowoppressiveoppressivemuggymuggyhumidhumiddrydrycomfortablecomfortablemiserablemiserable
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 Allen is decreasing during the spring, decreasing from 11.4 miles per hour to 9.9 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 11.9 miles per hour, while on August 22, the calmest day of the year, the daily average wind speed is 8.0 miles per hour.

The highest daily average wind speed during the spring is 11.9 miles per hour on April 1.

Average Wind Speed in the Spring in Allen

Average Wind Speed in the Spring in AllenMarAprMay0 mph0 mph5 mph5 mph10 mph10 mph15 mph15 mphWinterSummerApr 111.9 mphApr 111.9 mphMar 111.4 mphMar 111.4 mphMay 319.9 mphMay 319.9 mphMay 111.1 mphMay 111.1 mphNowNow
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 Allen throughout the spring is predominantly from the south, with a peak proportion of 64% on May 31.

Wind Direction in the Spring in Allen

Wind Direction in the Spring in AllenNSMarAprMay0%100%20%80%40%60%60%40%80%20%100%0%WinterSummerNowNowsouthnortheastwest
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 Allen typically lasts for 8.4 months (256 days), from around March 9 to around November 20, rarely starting before February 14 or after April 2, and rarely ending before October 31 or after December 11.

During the spring in Allen, the chance that a given day is within the growing season is very rapidly increasing rising from 34% to 100% over the course of the season.

Time Spent in Various Temperature Bands and the Growing Season in the Spring in Allen

Time Spent in Various Temperature Bands and the Growing Season in the Spring in Allengrowing seasonMarAprMay0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%WinterSummerMar 134%Mar 134%100%May 31100%May 3189%Apr 189%Apr 1100%May 1100%May 1Feb 1410%Feb 1410%NowNowfreezingvery coldcoldcoolcomfortablewarmhot
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 Allen are very rapidly increasing during the spring, increasing by 1,390°F, from 225°F to 1,616°F, over the course of the season.

Growing Degree Days in the Spring in Allen

Growing Degree Days in the Spring in AllenMarAprMay200°F200°F400°F400°F600°F600°F800°F800°F1,000°F1,000°F1,200°F1,200°F1,400°F1,400°F1,600°F1,600°FWinterSummerMar 1225°FMar 1225°FMay 311,616°FMay 311,616°FApr 1499°FApr 1499°FMay 1947°FMay 1947°FNowNow
The average growing degree days accumulated over the course of the spring, 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 Allen is very rapidly increasing during the spring, rising by 2.2 kWh, from 4.5 kWh to 6.7 kWh, over the course of the season.

Average Daily Incident Shortwave Solar Energy in the Spring in Allen

Average Daily Incident Shortwave Solar Energy in the Spring in AllenMarAprMay0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhWinterSummerMar 14.5 kWhMar 14.5 kWhMay 316.7 kWhMay 316.7 kWhApr 15.8 kWhApr 15.8 kWhMay 16.4 kWhMay 16.4 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 Allen are 33.103 deg latitude, -96.671 deg longitude, and 656 ft elevation.

The topography within 2 miles of Allen contains only modest variations in elevation, with a maximum elevation change of 131 feet and an average elevation above sea level of 648 feet. Within 10 miles also contains only modest variations in elevation (331 feet). Within 50 miles contains only modest variations in elevation (735 feet).

The area within 2 miles of Allen is covered by artificial surfaces (77%) and cropland (23%), within 10 miles by artificial surfaces (54%) and cropland (24%), and within 50 miles by grassland (37%) and cropland (33%).

This report illustrates the typical weather in Allen, 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 Allen.

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

The stations contributing to this reconstruction are:

  • McKinney Municipal Airport (KTKI, 58%, 8 mi, northeast, -72 ft elevation change)
  • Addison Airport (KADS, 26%, 13 mi, southwest, -13 ft elevation change)
  • Rockwall Municipal (KF46, 16%, 18 mi, southeast, -82 ft elevation change)

Sources mapKTKI, 58%8 mi, -72 ftKADS, 26%13 mi, -13 ftKF46, 16%18 mi, -82 ft© OpenStreetMap contributors

To get a sense of how much these sources agree with each other, you can view a comparison of Allen 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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