Average Weather in January in Afton Oklahoma, United States
Daily high temperatures increase by 2°F, from 47°F to 49°F, rarely falling below 30°F or exceeding 65°F. The lowest daily average high temperature is 47°F on January 5.
Daily low temperatures are around 28°F, rarely falling below 13°F or exceeding 44°F. The lowest daily average low temperature is 28°F on January 6.
For reference, on July 24, the hottest day of the year, temperatures in Afton typically range from 72°F to 92°F, while on January 6, the coldest day of the year, they range from 28°F to 47°F.
Average High and Low Temperature in January
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on January. 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.
Average Hourly Temperature in January
The month of January in Afton experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 46% throughout the month.
The clearest day of the month is January 16, with clear, mostly clear, or partly cloudy conditions 55% of the time.
For reference, on February 12, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 49%, while on July 29, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 72%.
Cloud Cover Categories in January
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. In Afton, the chance of a wet day over the course of January is essentially constant, remaining around 14% throughout.
For reference, the year's highest daily chance of a wet day is 45% on May 21, and its lowest chance is 13% on January 12.
Over the course of January in Afton, the chance of a day with only rain remains an essentially constant 10% throughout, the chance of a day with mixed snow and rain remains an essentially constant 3% throughout, and the chance of a day with only snow remains an essentially constant 2% throughout.
Probability of Precipitation in January
The average sliding 31-day rainfall during January in Afton is gradually decreasing, starting the month at 1.7 inches, when it rarely exceeds 4.5 inches or falls below 0.2 inches, and ending the month at 1.5 inches, when it rarely exceeds 3.1 inches or falls below 0.2 inches.
The lowest average 31-day accumulation is 1.3 inches on January 22.
Average Monthly Rainfall in January
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. As with rainfall, we consider the liquid-equivalent snowfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day liquid-equivalent snowfall during January in Afton is essentially constant, remaining about 0.2 inches throughout, and rarely exceeding 0.7 inches or falling to 0.0 inches.
The highest average 31-day liquid-equivalent accumulation is 0.2 inches on January 18.
Average Monthly Liquid-Equivalent Snowfall in January
Over the course of January in Afton, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 40 minutes, implying an average daily increase of 1 minute, 19 seconds, and weekly increase of 9 minutes, 14 seconds.
The shortest day of the month is January 1, with 9 hours, 42 minutes of daylight and the longest day is January 31, with 10 hours, 22 minutes of daylight.
Hours of Daylight and Twilight in January
The latest sunrise of the month in Afton is 7:32 AM on January 6 and the earliest sunrise is 10 minutes earlier at 7:22 AM on January 31.
The earliest sunset is 5:14 PM on January 1 and the latest sunset is 30 minutes later at 5:44 PM on January 31.
Daylight saving time is observed in Afton during 2018, but it neither starts nor ends during January, so the entire month is in standard time.
For reference, on June 21, the longest day of the year, the Sun rises at 6:01 AM and sets 14 hours, 41 minutes later, at 8:41 PM, while on December 21, the shortest day of the year, it rises at 7:28 AM and sets 9 hours, 39 minutes later, at 5:07 PM.
Sunrise & Sunset with Twilight in January
The chance that a given day will be muggy in Afton is essentially constant during January, remaining around 0% throughout.
For reference, on July 6, the muggiest day of the year, there are muggy conditions 83% of the time, while on December 13, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in January
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Afton is essentially constant during January, remaining within 0.1 miles per hour of 9.7 miles per hour throughout.
For reference, on April 1, the windiest day of the year, the daily average wind speed is 11.0 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 6.9 miles per hour.
Average Wind Speed in January
Wind Direction in January
The growing season in Afton typically lasts for 7.0 months (214 days), from around March 31 to around October 31, rarely starting before March 9 or after April 20, and rarely ending before October 12 or after November 20.
The month of January in Afton is reliably fully outside of the growing season.
Time Spent in Various Temperature Bands and the Growing Season in January
The average accumulated growing degree days in Afton are essentially constant during January, remaining within 17°F of 17°F throughout.
Growing Degree Days in January
The average daily incident shortwave solar energy in Afton is gradually increasing during January, rising by 0.6 kWh, from 2.4 kWh to 3.0 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in January
For the purposes of this report, the geographical coordinates of Afton are 36.694 deg latitude, -94.963 deg longitude, and 791 ft elevation.
The topography within 2 miles of Afton is essentially flat, with a maximum elevation change of 62 feet and an average elevation above sea level of 790 feet. Within 10 miles is essentially flat (335 feet). Within 50 miles contains only modest variations in elevation (932 feet).
The area within 2 miles of Afton is covered by cropland (98%), within 10 miles by cropland (80%), and within 50 miles by cropland (64%) and trees (28%).
This report illustrates the typical weather in Afton year round, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Afton.
For each station, the records are corrected for the elevation difference between that station and Afton 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 Afton is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Afton and a given station.
The stations contributing to this reconstruction are: Grove Municipal Airport (63%, 22 kilometers, southeast); Claremore Regional Airport (13%, 64 kilometers, southwest); Joplin Regional Airport (12%, 66 kilometers, northeast); and Coffeyville Municipal Airport (12%, 70 kilometers, northwest).
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.
Time zones for aiports and weather stations are provided by AskGeo.com .