Summer Weather in Oklahoma City Oklahoma, United States
Daily high temperatures increase by 6°F, from 84°F to 90°F, rarely falling below 75°F or exceeding 102°F. The highest daily average high temperature is 94°F on July 26.
Daily low temperatures increase by 5°F, from 66°F to 70°F, rarely falling below 58°F or exceeding 78°F. The highest daily average low temperature is 74°F on July 24.
For reference, on July 23, the hottest day of the year, temperatures in Oklahoma City typically range from 74°F to 94°F, while on January 4, the coldest day of the year, they range from 30°F to 49°F.
The figure below shows you a compact characterization of the hourly average summer 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.
Kahramanmaraş, Turkey (6,614 miles away); Shahre Jadide Andisheh, Iran (7,128 miles); and Changshu City, China (7,186 miles) are the far-away foreign places with temperatures most similar to Oklahoma City (view comparison).
The summer in Oklahoma City experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 37% to 30%.
The clearest day of the summer is July 26, with clear, mostly clear, or partly cloudy conditions 71% of the time.
For reference, on February 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 46%, while on October 5, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 74%.
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Oklahoma City, the chance of a wet day over the course of the summer is very rapidly decreasing, starting the season at 40% and ending it at 26%.
For reference, the year's highest daily chance of a wet day is 40% on June 4, and its lowest chance is 10% on January 19.
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 summer in Oklahoma City is rapidly decreasing, starting the season at 4.7 inches, when it rarely exceeds 8.8 inches or falls below 1.9 inches, and ending the season at 2.8 inches, when it rarely exceeds 5.1 inches or falls below 0.7 inches.
The lowest average 31-day accumulation is 2.5 inches on July 21.
Over the course of the summer in Oklahoma City, the length of the day is rapidly decreasing. From the start to the end of the season, the length of the day decreases by 1 hour, 27 minutes, implying an average daily decrease of 57 seconds, and weekly decrease of 6 minutes, 40 seconds.
The shortest day of the summer is August 31, with 12 hours, 57 minutes of daylight and the longest day is June 21, with 14 hours, 33 minutes of daylight.
The earliest sunrise of the summer in Oklahoma City is 6:14 AM on June 13 and the latest sunrise is 47 minutes later at 7:01 AM on August 31.
The latest sunset is 8:49 PM on June 29 and the earliest sunset is 51 minutes earlier at 7:58 PM on August 31.
Daylight saving time is observed in Oklahoma City during 2023, but it neither starts nor ends during the summer, so the entire season is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 6:15 AM and sets 14 hours, 33 minutes later, at 8:48 PM, while on December 22, the shortest day of the year, it rises at 7:35 AM and sets 9 hours, 46 minutes later, at 5:21 PM.
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.
The figure below presents a compact representation of key lunar data for the summer of 2023. 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.
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 Oklahoma City is increasing during the summer, rising from 39% to 48% over the course of the season.
The highest chance of a muggy day during the summer is 70% on July 5.
For reference, on July 5, the muggiest day of the year, there are muggy conditions 70% of the time, while on December 12, the least muggy day of the year, there are muggy conditions 0% 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 Oklahoma City is decreasing during the summer, decreasing from 11.1 miles per hour to 9.4 miles per hour over the course of the season.
For reference, on April 4, the windiest day of the year, the daily average wind speed is 13.2 miles per hour, while on August 12, the calmest day of the year, the daily average wind speed is 9.0 miles per hour.
The lowest daily average wind speed during the summer is 9.0 miles per hour on August 12.
The hourly average wind direction in Oklahoma City throughout the summer is predominantly from the south, with a peak proportion of 71% on June 25.
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 Oklahoma City typically lasts for 7.6 months (234 days), from around March 23 to around November 12, rarely starting before March 3 or after April 14, and rarely ending before October 23 or after November 30.
The summer in Oklahoma City is reliably fully 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 Oklahoma City are very rapidly increasing during the summer, increasing by 2,637°F, from 1,276°F to 3,913°F, over the course of the season.
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 Oklahoma City is gradually decreasing during the summer, falling by 0.8 kWh, from 6.8 kWh to 6.0 kWh, over the course of the season.
The highest average daily incident shortwave solar energy during the summer is 7.2 kWh on July 10.
For the purposes of this report, the geographical coordinates of Oklahoma City are 35.468 deg latitude, -97.516 deg longitude, and 1,194 ft elevation.
The topography within 2 miles of Oklahoma City contains only modest variations in elevation, with a maximum elevation change of 108 feet and an average elevation above sea level of 1,202 feet. Within 10 miles also contains only modest variations in elevation (364 feet). Within 50 miles contains only modest variations in elevation (948 feet).
The area within 2 miles of Oklahoma City is covered by artificial surfaces (91%), within 10 miles by artificial surfaces (62%) and grassland (21%), and within 50 miles by grassland (55%) and cropland (28%).
This report illustrates the typical weather in Oklahoma 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Oklahoma City.
For each station, the records are corrected for the elevation difference between that station and Oklahoma 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 Oklahoma City is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Oklahoma City 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 Oklahoma City 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.
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.
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.
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