Average Weather in San Angelo Texas, United States
In San Angelo, the summers are hot and humid; the winters are short, cold, dry, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 35°F to 96°F and is rarely below 24°F or above 102°F.
Based on the beach/pool score, the best time of year to visit San Angelo for hot-weather activities is from early June to early September.
The hot season lasts for 3.8 months, from May 21 to September 14, with an average daily high temperature above 89°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
Nueve de Julio, Argentina (4,845 miles away); Ouarzazat, Morocco (5,334 miles); and Baffa, Pakistan (7,873 miles) are the far-away foreign places with temperatures most similar to San Angelo (view comparison).
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 1. 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 1 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.
Cloud Cover Categories
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 5.9 months, from April 27 to October 22, with a greater than 19% 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 6.1 months, from October 22 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 of 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 an average total accumulation of 0.7 inches.
Average Monthly Rainfall
The length of the day in San Angelo varies significantly over the course of the year. In 2018, 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, 23 minutes later at 7:59 AM on November 3. 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 2018, starting in the spring on March 11, lasting 7.8 months, and ending in the fall on November 4.
Sunrise & Sunset with Twilight and Daylight Saving Time
San Angelo experiences significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 4.9 months, from May 11 to October 7, during which time the comfort level is muggy, oppressive, or miserable at least 11% 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
The average hourly wind speed in San Angelo experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 5.1 months, from February 2 to July 5, with average wind speeds of more than 10.9 miles per hour. The windiest day of the year is April 2, with an average hourly wind speed of 12.5 miles per hour.
The calmer time of year lasts for 6.9 months, from July 5 to February 2. The calmest day of the year is August 27, with an average hourly wind speed of 9.3 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in San Angelo is from the south throughout the year.
Best Time of Year to Visit
To characterize how pleasant the weather is in San Angelo throughout the year, we compute two travel scores.
The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit San Angelo for general outdoor tourist activities are from mid April to early July and from late August to late October, with a peak score in the third week of September.
The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit San Angelo for hot-weather activities is from early June to early September, with a peak score in the first week of July.
For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.
Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.
Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.
Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.
The growing season in San Angelo typically lasts for 7.8 months (240 days), from around March 21 to around November 15, rarely starting before February 26 or after April 11, and rarely ending before October 26 or after December 5.
Time Spent in Various Temperature Bands and the Growing Season
Based on growing degree days alone, the first spring blooms in San Angelo should appear around January 26, only rarely appearing before January 17 or after February 9.
Growing Degree Days
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 17, with an average daily incident shortwave energy per square meter above 6.6 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 2.8 months, from November 9 to February 3, with an average daily incident shortwave energy per square meter below 4.0 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 only modest variations in elevation (604 feet). Within 50 miles contains 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).
Time zones for aiports and weather stations are provided by AskGeo.com .