Average Weather in San Angelo Texas, United States
In San Angelo, the temperature typically varies from 35°F to 96°F over the course of the year, and is rarely below 24°F or above 102°F.
The hot season lasts for 3.8 months, from May 20 to September 14, with an average daily high temperature above 88°F. The hottest day of the year is July 27, with an average high of 96°F and low of 73°F.
The cool season lasts for 2.9 months, from November 23 to February 20, with an average daily high temperature below 67°F. The coldest day of the year is January 4, with an average low of 35°F and high of 59°F.
Average High and Low Temperature
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
The length of the day in San Angelo varies significantly over the course of the year. In 2017, the shortest day is December 21, with 10 hours, 6 minutes of daylight; the longest day is June 21, with 14 hours, 12 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 6:36 AM on June 11, and the latest sunrise is 1 hour, 24 minutes later at 8:00 AM on November 4. The earliest sunset is at 5:38 PM on December 3, and the latest sunset is 3 hours, 12 minutes later at 8:50 PM on June 29.
Daylight saving time (DST) is observed in San Angelo 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
In San Angelo, the average percentage of the sky covered by clouds experiences mild seasonal variation over the course of the year.
The clearer part of the year in San Angelo begins around April 10 and lasts for 3.7 months, ending around August 2. On June 11, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 77% of the time, and overcast or mostly cloudy 23% of the time.
The cloudier part of the year begins around August 2 and lasts for 8.3 months, ending around April 10. On February 24, the cloudiest day of the year, the sky is overcast or mostly cloudy 42% of the time, and clear, mostly clear, or partly cloudy 58% 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 San Angelo varies throughout the year.
The wetter season lasts 5.8 months, from April 27 to October 21, with a greater than 20% chance of a given day being a wet day. The chance of a wet day peaks at 31% on May 27.
The drier season lasts 6.2 months, from October 21 to April 27. The smallest chance of a wet day is 7% on January 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 31% on May 27.
Daily Chance of Precipitation
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 in the year. San Angelo experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in San Angelo. The most rain falls during the 31 days centered around May 29, with an average total accumulation of 2.8 inches.
The least rain falls around January 4, with and average total accumulation of 0.7 inches.
Average Monthly Rainfall
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.
San Angelo experiences significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 4.8 months, from May 12 to October 6, during which time the comfort level is muggy, oppressive, or miserable at least 12% of the time. The muggiest day of the year is June 23, with muggy conditions 45% of the time.
The least muggy day of the year is January 29, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
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 San Angelo experiences mildly seasonal variation over the course of the year.
The windier part of the year lasts for 5.2 months, from February 1 to July 6, with average wind speeds of more than 5.8 miles per hour. The windiest day of the year is April 1, with an average hourly wind speed of 6.7 miles per hour.
The calmer time of year lasts for 6.8 months, from July 6 to February 1. The calmest day of the year is August 27, with an average hourly wind speed of 5.0 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in San Angelo is from the south throughout the year.
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 8 to August 18, with an average daily incident shortwave energy per square meter above 6.5 kWh. The brightest day of the year is July 1, with an average of 7.4 kWh.
The darker period of the year lasts for 2.9 months, from November 8 to February 4, with an average daily incident shortwave energy per square meter below 4.1 kWh. The darkest day of the year is December 23, with an average of 3.2 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of San Angelo are 31.464 deg latitude, -100.437 deg longitude, and 1,860 ft elevation.
The topography within 2 miles of San Angelo contains only modest variations in elevation, with a maximum elevation change of 108 feet, and an average elevation above sea level of 1,849 feet. Within 10 miles contains significant variations in elevation (604 feet). Within 50 miles contains very significant variations in elevation (1,358 feet).
The area within 2 miles of San Angelo is covered by artificial surfaces (48%), shrubs (39%), and bare soil (14%), within 10 miles by shrubs (48%) and cropland (29%), and within 50 miles by shrubs (73%) and grassland (16%).
This report illustrates the typical weather in San Angelo, 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 6 weather stations near enough to contribute to our estimation of the temperature and dew point in San Angelo.
For each station, the records are corrected for the elevation difference between that station and San Angelo 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 San Angelo is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between San Angelo and a given station.
The stations contributing to this reconstruction are: Mathis Field (83%, 14 kilometers, southwest), Coleman Municipal Airport (3.8%, 107 kilometers, northeast), Brady Curtis Field (3.6%, 111 kilometers, east), Avenger Field (3.5%, 112 kilometers, north), Dyess Air Force Base (3.2%, 121 kilometers, northeast), and Big Spring McMahon-Wrinkle Airport (2.7%, 132 kilometers, northwest).
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 .