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Average Weather in Glenpool Oklahoma, United States

In Glenpool, the summers are hot and muggy, the winters are very cold and windy, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 29°F to 94°F and is rarely below 15°F or above 102°F.

Climate Summary

coldcoolwarmhotwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDec73%73%53%53%clearovercastprecipitation: 5.0 inprecipitation: 5.0 in1.6 in1.6 inmuggy: 82%muggy: 82%0%0%drydrybeach/pool score: 6.2beach/pool score: 6.20.10.1
Click on each chart for more information.

Based on the beach/pool score, the best time of year to visit Glenpool for hot-weather activities is from mid June to early September.

Temperature

The hot season lasts for 3.3 months, from June 5 to September 15, with an average daily high temperature above 85°F. The hottest day of the year is July 24, with an average high of 94°F and low of 72°F.

The cold season lasts for 3.0 months, from November 26 to February 24, with an average daily high temperature below 58°F. The coldest day of the year is January 6, with an average low of 29°F and high of 49°F.

Average High and Low Temperature

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 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

Average Hourly Temperature in GlenpoolJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMvery coldcoldcoolhotcoldcoolwarmwarmvery coldvery coldcomfortablevery coldfreezing
The average hourly temperature, color coded into bands: 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 shaded overlays indicate night and civil twilight.

Khavāş Kūh, Iran (7,337 miles away); Mashhad, Iran (7,211 miles); and Dushanbe, Tajikistan (7,207 miles) are the far-away foreign places with temperatures most similar to Glenpool (view comparison).

Clouds

In Glenpool, 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 Glenpool begins around June 8 and lasts for 4.9 months, ending around November 5. On July 24, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 73% of the time, and overcast or mostly cloudy 27% of the time.

The cloudier part of the year begins around November 5 and lasts for 7.1 months, ending around June 8. On February 12, the cloudiest day of the year, the sky is overcast or mostly cloudy 47% of the time, and clear, mostly clear, or partly cloudy 53% of the time.

Cloud Cover Categories

Cloud Cover Categories in GlenpoolclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2473%Jul 2473%Feb 1253%Feb 1253%Jun 862%Jun 862%Nov 563%Nov 563%clearpartly cloudyovercastmostly clearmostly cloudy
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

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

The wetter season lasts 5.6 months, from April 7 to September 26, with a greater than 28% chance of a given day being a wet day. The chance of a wet day peaks at 43% on May 21.

The drier season lasts 6.4 months, from September 26 to April 7. The smallest chance of a wet day is 13% on January 12.

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 43% on May 21.

Daily Chance of Precipitation

Daily Chance of Precipitation in GlenpoolwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%May 2143%May 2143%Jan 1213%Jan 1213%Jan 114%Jan 114%Apr 728%Apr 728%Sep 2628%Sep 2628%rainsnowmixed
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 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. Glenpool experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Glenpool. The most rain falls during the 31 days centered around May 24, with an average total accumulation of 5.0 inches.

The least rain falls around January 21, with an average total accumulation of 1.3 inches.

Average Monthly Rainfall

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 liquid-equivalent snowfall.

Snowfall

The sliding 31-day liquid-equivalent quantity of snowfall in Glenpool does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall in GlenpoolsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in1 in2 in3 in4 in5 inJan 180.2 inJan 180.2 inJul 200.0 inJul 200.0 inNov 190.1 inNov 190.1 inMar 80.1 inMar 80.1 in
The average liquid-equivalent snowfall (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 rainfall.

Sun

The length of the day in Glenpool varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 43 minutes of daylight; the longest day is June 20, with 14 hours, 36 minutes of daylight.

Hours of Daylight and Twilight

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 earliest sunrise is at 6:06 AM on June 13, and the latest sunrise is 1 hour, 43 minutes later at 7:49 AM on November 4. The earliest sunset is at 5:09 PM on December 5, and the latest sunset is 3 hours, 35 minutes later at 8:44 PM on June 28.

Daylight saving time (DST) is observed in Glenpool 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

Sunrise & Sunset with Twilight and Daylight Saving Time in GlenpoolJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 136:06 AMJun 136:06 AM8:44 PMJun 288:44 PMJun 28Dec 55:09 PMDec 55:09 PM7:49 AMNov 47:49 AMNov 4Mar 12DSTMar 12DSTDSTNov 5DSTNov 5daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of the year 2017. 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.

Humidity

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.

Glenpool experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 4.5 months, from May 13 to September 29, during which time the comfort level is muggy, oppressive, or miserable at least 21% of the time. The muggiest day of the year is July 6, with muggy conditions 82% of the time.

The least muggy day of the year is January 28, when muggy conditions are essentially unheard of.

Humidity Comfort Levels

Humidity Comfort Levels in GlenpoolmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jan 280%Jan 280%82%Jul 682%Jul 6May 1321%May 1321%Sep 2921%Sep 2921%humidhumiddrydrymuggymuggyoppressiveoppressivemiserablemiserablecomfortablecomfortable
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Glenpool experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 7.2 months, from October 17 to May 24, with average wind speeds of more than 10.0 miles per hour. The windiest day of the year is April 1, with an average hourly wind speed of 12.1 miles per hour.

The calmer time of year lasts for 4.8 months, from May 24 to October 17. The calmest day of the year is August 7, with an average hourly wind speed of 7.9 miles per hour.

Average Wind Speed

Average Wind Speed in GlenpoolwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph2 mph4 mph6 mph8 mph10 mph12 mph14 mph16 mph18 mph20 mphApr 112.1 mphApr 112.1 mphAug 77.9 mphAug 77.9 mphOct 1710.0 mphOct 1710.0 mphMay 2410.0 mphMay 2410.0 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

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

The wind is most often from the south for 10 months, from February 24 to December 26, with a peak percentage of 68% on June 25. The wind is most often from the north for 1.9 months, from December 26 to February 24, with a peak percentage of 38% on January 1.

Wind Direction

Wind Direction in GlenpoolNSJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%northsoutheastwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Best Time of Year to Visit

To characterize how pleasant the weather is in Glenpool 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 Glenpool for general outdoor tourist activities are from early May to late June and from mid August to mid October, with a peak score in the third week of September.

Tourism Score

Tourism Score in Glenpoolbest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.26.20.80.86.06.05.45.4precipitationprecipitationcloudscloudstemperaturetemperaturetourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

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 Glenpool for hot-weather activities is from mid June to early September, with a peak score in the first week of July.

Beach/Pool Score

Beach/Pool Score in Glenpoolbest timeJanFebMarAprMayJunJulAugSepOctNovDec02468106.26.20.10.1 precipitationprecipitationcloudscloudstemperaturetemperaturebeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

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.

Growing Season

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 Glenpool typically lasts for 7.4 months (226 days), from around March 27 to around November 8, rarely starting before March 6 or after April 17, and rarely ending before October 18 or after November 27.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Glenpoolgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Mar 2750%Mar 2750%Nov 850%Nov 890%Apr 1790%Apr 1790%Oct 1890%Oct 1810%Mar 610%Mar 610%Nov 2710%Nov 270%Dec 230%Dec 23Jul 14100%Jul 14100%comfortablehotcoldcoolwarmfreezingvery coldswelteringfrigid
The percentage of time spent in various temperature bands: 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 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.

Based on growing degree days alone, the first spring blooms in Glenpool should appear around February 20, only rarely appearing before February 6 or after March 11.

Growing Degree Days

The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 4.0 months, from April 24 to August 26, with an average daily incident shortwave energy per square meter above 6.1 kWh. The brightest day of the year is July 9, with an average of 7.1 kWh.

The darker period of the year lasts for 3.0 months, from November 7 to February 7, with an average daily incident shortwave energy per square meter below 3.4 kWh. The darkest day of the year is December 22, with an average of 2.5 kWh.

Average Daily Incident Shortwave Solar Energy

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Glenpool are 35.955 deg latitude, -96.009 deg longitude, and 728 ft elevation.

The topography within 2 miles of Glenpool contains only modest variations in elevation, with a maximum elevation change of 272 feet and an average elevation above sea level of 728 feet. Within 10 miles contains only modest variations in elevation (495 feet). Within 50 miles also contains significant variations in elevation (653 feet).

The area within 2 miles of Glenpool is covered by cropland (71%) and artificial surfaces (22%), within 10 miles by cropland (53%) and artificial surfaces (23%), and within 50 miles by cropland (37%) and trees (32%).

Data Sources

This report illustrates the typical weather in Glenpool, 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Glenpool.

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

The stations contributing to this reconstruction are: Richard Lloyd Jones Jr Airport (85%, 10 kilometers, north) and Okmulgee Regional Airport (15%, 32 kilometers, south).

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.

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.