Average Weather in Tahlequah Oklahoma, United States
In Tahlequah, the summers are hot and muggy, the winters are very cold, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 28°F to 93°F and is rarely below 13°F or above 101°F.
Based on the tourism score, the best time of year to visit Tahlequah for warm-weather activities is from early May to early October.
The hot season lasts for 3.3 months, from June 5 to September 15, with an average daily high temperature above 84°F. The hottest day of the year is July 24, with an average high of 93°F and low of 70°F.
The cold season lasts for 3.0 months, from November 25 to February 25, with an average daily high temperature below 57°F. The coldest day of the year is January 6, with an average low of 28°F and high of 48°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
In Tahlequah, 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 Tahlequah begins around June 10 and lasts for 4.9 months, ending around November 5. On October 5, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 71% of the time, and overcast or mostly cloudy 29% of the time.
The cloudier part of the year begins around November 5 and lasts for 7.1 months, ending around June 10. On February 11, the cloudiest day of the year, the sky is overcast or mostly cloudy 48% of the time, and clear, mostly clear, or partly cloudy 52% of the time.
Cloud Cover Categories
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Tahlequah varies throughout the year.
The wetter season lasts 5.1 months, from April 6 to September 10, with a greater than 29% chance of a given day being a wet day. The chance of a wet day peaks at 44% on May 21.
The drier season lasts 6.9 months, from September 10 to April 6. The smallest chance of a wet day is 15% on January 19.
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 44% on May 21.
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. Tahlequah experiences significant seasonal variation in monthly rainfall.
Rain falls throughout the year in Tahlequah. The most rain falls during the 31 days centered around May 17, with an average total accumulation of 5.1 inches.
The least rain falls around January 23, with an average total accumulation of 1.7 inches.
Average Monthly Rainfall
The sliding 31-day liquid-equivalent quantity of snowfall in Tahlequah 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
The length of the day in Tahlequah varies significantly over the course of the year. In 2018, the shortest day is December 21, with 9 hours, 43 minutes of daylight; the longest day is June 21, with 14 hours, 36 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 6:02 AM on June 13, and the latest sunrise is 1 hour, 42 minutes later at 7:44 AM on November 3. The earliest sunset is at 5:05 PM on December 5, and the latest sunset is 3 hours, 35 minutes later at 8:40 PM on June 28.
Daylight saving time (DST) is observed in Tahlequah 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
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.
Tahlequah experiences extreme seasonal variation in the perceived humidity.
The muggier period of the year lasts for 4.5 months, from May 12 to September 27, 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 8, with muggy conditions 83% of the time.
The least muggy day of the year is January 13, when muggy conditions are essentially unheard of.
Humidity Comfort Levels
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 Tahlequah experiences significant seasonal variation over the course of the year.
The windier part of the year lasts for 6.8 months, from October 23 to May 18, with average wind speeds of more than 6.5 miles per hour. The windiest day of the year is March 19, with an average hourly wind speed of 8.1 miles per hour.
The calmer time of year lasts for 5.2 months, from May 18 to October 23. The calmest day of the year is August 3, with an average hourly wind speed of 4.8 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Tahlequah varies throughout the year.
The wind is most often from the north for 1.2 months, from January 15 to February 20, with a peak percentage of 37% on January 28. The wind is most often from the south for 11 months, from February 20 to January 15, with a peak percentage of 37% on January 1.
Best Time of Year to Visit
To characterize how pleasant the weather is in Tahlequah 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 time of year to visit Tahlequah for general outdoor tourist activities is from early May to early October, with a peak score in the second 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 Tahlequah for hot-weather activities is from mid 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.
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 Tahlequah typically lasts for 6.7 months (207 days), from around April 6 to around October 30, rarely starting before March 18 or after April 24, and rarely ending before October 11 or after November 19.
Time Spent in Various Temperature Bands and 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 Tahlequah should appear around February 22, only rarely appearing before February 6 or after March 13.
Growing Degree Days
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 28 to August 27, 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 7.0 kWh.
The darker period of the year lasts for 3.0 months, from November 7 to February 8, with an average daily incident shortwave energy per square meter below 3.3 kWh. The darkest day of the year is December 23, with an average of 2.4 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Tahlequah are 35.915 deg latitude, -94.970 deg longitude, and 850 ft elevation.
The topography within 2 miles of Tahlequah contains only modest variations in elevation, with a maximum elevation change of 338 feet and an average elevation above sea level of 842 feet. Within 10 miles contains only modest variations in elevation (633 feet). Within 50 miles contains significant variations in elevation (1,844 feet).
The area within 2 miles of Tahlequah is covered by cropland (43%), artificial surfaces (40%), and trees (17%), within 10 miles by cropland (49%) and trees (48%), and within 50 miles by cropland (53%) and trees (39%).
This report illustrates the typical weather in Tahlequah, 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 Tahlequah.
For each station, the records are corrected for the elevation difference between that station and Tahlequah 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 Tahlequah is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Tahlequah and a given station.
The stations contributing to this reconstruction are: Tahlequah Municipal Airport (97%, 3.4 kilometers, northwest); Smith Field (1.6%, 53 kilometers, northeast); and Sallisaw Municipal Airport (1.5%, 55 kilometers, south).
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.