Average Weather in League City Texas, United States

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2. United States
3. Texas
4. Galveston County
5. League City

In League City, the summers are long, hot, and oppressive; the winters are short, cool, and windy; and it is wet and partly cloudy year round. Over the course of the year, the temperature typically varies from 47°F to 92°F and is rarely below 35°F or above 96°F.

The hot season lasts for 4.0 months, from May 26 to September 25, with an average daily high temperature above 86°F. The hottest day of the year is August 6, with an average high of 92°F and low of 77°F.

The cool season lasts for 2.9 months, from December 1 to February 26, with an average daily high temperature below 68°F. The coldest day of the year is January 6, with an average low of 47°F and high of 62°F.

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.

In League City, 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 League City begins around September 16 and lasts for 2.7 months, ending around December 7. On October 26, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 69% of the time, and overcast or mostly cloudy 31% of the time.

The cloudier part of the year begins around December 7 and lasts for 9.3 months, ending around September 16. On August 20, the cloudiest day of the year, the sky is overcast or mostly cloudy 52% of the time, and clear, mostly clear, or partly cloudy 48% of the time.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in League City varies throughout the year.

The wetter season lasts 4.0 months, from May 22 to September 23, with a greater than 30% chance of a given day being a wet day. The chance of a wet day peaks at 40% on August 27.

The drier season lasts 8.0 months, from September 23 to May 22. The smallest chance of a wet day is 20% on April 1.

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 40% on August 27.

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. League City experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in League City. The most rain falls during the 31 days centered around September 7, with an average total accumulation of 4.8 inches.

The least rain falls around March 4, with an average total accumulation of 2.9 inches.

The length of the day in League City varies significantly over the course of the year. In 2017, the shortest day is December 21, with 10 hours, 15 minutes of daylight; the longest day is June 21, with 14 hours, 2 minutes of daylight.

The earliest sunrise is at 6:19 AM on June 10, and the latest sunrise is 1 hour, 16 minutes later at 7:36 AM on November 4. The earliest sunset is at 5:21 PM on November 30, and the latest sunset is 3 hours, 3 minutes later at 8:24 PM on July 1.

Daylight saving time (DST) is observed in League City during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.

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.

League City experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 7.2 months, from April 2 to November 8, during which time the comfort level is muggy, oppressive, or miserable at least 30% of the time. The muggiest day of the year is July 21, with muggy conditions 99% of the time.

The least muggy day of the year is January 29, with muggy conditions 6% 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 League City experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 7.9 months, from October 11 to June 9, with average wind speeds of more than 5.0 miles per hour. The windiest day of the year is April 3, with an average hourly wind speed of 6.0 miles per hour.

The calmer time of year lasts for 4.1 months, from June 9 to October 11. The calmest day of the year is August 15, with an average hourly wind speed of 4.1 miles per hour.

The predominant average hourly wind direction in League City varies throughout the year.

The wind is most often from the south for 7.1 months, from February 5 to September 7 and for 3.6 weeks, from November 8 to December 3, with a peak percentage of 73% on June 27. The wind is most often from the east for 2.0 months, from September 7 to November 8, with a peak percentage of 42% on September 20. The wind is most often from the north for 2.1 months, from December 3 to February 5, with a peak percentage of 37% on January 1.

League City is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences significant seasonal variation over the course of the year.

The time of year with warmer water lasts for 4.1 months, from May 31 to October 3, with an average temperature above 80°F. The day of the year with the warmest water is August 18, with an average temperature of 86°F.

The time of year with cooler water lasts for 3.3 months, from December 11 to March 20, with an average temperature below 65°F. The day of the year with the coolest water is January 30, with an average temperature of 59°F.

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 3.0 months, from April 5 to July 4, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest day of the year is June 3, with an average of 6.7 kWh.

The darker period of the year lasts for 2.6 months, from November 14 to February 2, with an average daily incident shortwave energy per square meter below 3.7 kWh. The darkest day of the year is December 24, with an average of 3.0 kWh.

For the purposes of this report, the geographical coordinates of League City are 29.507 deg latitude, -95.095 deg longitude, and 20 ft elevation.

The topography within 2 miles of League City is essentially flat, with a maximum elevation change of 23 feet and an average elevation above sea level of 16 feet. Within 10 miles is also essentially flat (52 feet). Within 50 miles is essentially flat (174 feet).

The area within 2 miles of League City is covered by artificial surfaces (77%) and cropland (14%), within 10 miles by artificial surfaces (43%) and cropland (34%), and within 50 miles by water (30%) and cropland (29%).

This report illustrates the typical weather in League City, 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 League City.

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

The stations contributing to this reconstruction are: Ellington Field (44%, 14 kilometers, northwest); Pearland Regional Airport (43%, 14 kilometers, west); Scholes Field (11%, 35 kilometers, southeast); and Jack Brooks Regional Airport (1.9%, 115 kilometers, northeast).

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.