Average Weather in January in Dayton Tennessee, United States
In Dayton, the month of January is characterized by essentially constant daily high temperatures, with daily highs around 49°F throughout the month, rarely exceeding 63°F or dropping below 35°F. The lowest daily average high temperature is 48°F on January 8.
Daily low temperatures are around 33°F, rarely falling below 18°F or exceeding 48°F. The lowest daily average low temperature is 32°F on January 25.
For reference, on July 21, the hottest day of the year, temperatures in Dayton typically range from 70°F to 88°F, while on January 25, the coldest day of the year, they range from 32°F to 49°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 Dayton experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 54% throughout the month. The highest chance of overcast or mostly cloudy conditions is 56% on January 3.
The clearest day of the month is January 29, with clear, mostly clear, or partly cloudy conditions 48% of the time.
For reference, on January 3, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 56%, while on September 20, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 66%.
Cloud Cover in January
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Dayton, the chance of a wet day over the course of January is essentially constant, remaining around 30% throughout.
For reference, the year's highest daily chance of a wet day is 43% on July 9, and its lowest chance is 21% on October 16.
Over the course of January in Dayton, the chance of a day with only rain remains an essentially constant 26% throughout, the chance of a day with mixed snow and rain remains an essentially constant 2% throughout, and the chance of a day with only snow remains an essentially constant 1% throughout.
Probability of Precipitation in January
The average sliding 31-day rainfall during January in Dayton is essentially constant, remaining about 4.2 inches throughout, and rarely exceeding 7.3 inches or falling below 1.7 inches.
The lowest average 31-day accumulation is 4.2 inches on January 16.
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 Dayton is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.5 inches or falling below -0.0 inches.
The highest average 31-day liquid-equivalent accumulation is 0.2 inches on January 29.
Average Monthly Liquid-Equivalent Snowfall in January
Over the course of January in Dayton, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 38 minutes, implying an average daily increase of 1 minute, 16 seconds, and weekly increase of 8 minutes, 52 seconds.
The shortest day of the month is January 1, with 9 hours, 49 minutes of daylight and the longest day is January 31, with 10 hours, 27 minutes of daylight.
Hours of Daylight and Twilight in January
The latest sunrise of the month in Dayton is 7:49 AM on January 6 and the earliest sunrise is 10 minutes earlier at 7:40 AM on January 31.
The earliest sunset is 5:38 PM on January 1 and the latest sunset is 29 minutes later at 6:07 PM on January 31.
Daylight saving time is observed in Dayton during 2017, 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 6:25 AM and sets 14 hours, 34 minutes later, at 8:58 PM, while on December 21, the shortest day of the year, it rises at 7:45 AM and sets 9 hours, 46 minutes later, at 5:31 PM.
Sunrise & Sunset with Twilight in January
The chance that a given day will be muggy in Dayton is essentially constant during January, remaining around 0% throughout.
For reference, on July 24, the muggiest day of the year, there are muggy conditions 84% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in January
The average hourly wind speed in Dayton is essentially constant during January, remaining within 0.1 miles per hour of 2.7 miles per hour throughout.
For reference, on February 26, the windiest day of the year, the daily average wind speed is 2.9 miles per hour, while on August 1, the calmest day of the year, the daily average wind speed is 1.7 miles per hour.
Average Wind Speed in January
Wind Direction in January
The average daily incident shortwave solar energy in Dayton 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 Dayton are 35.494 deg latitude, -85.012 deg longitude, and 833 ft elevation.
The topography within 2 miles of Dayton contains very significant variations in elevation, with a maximum elevation change of 853 feet and an average elevation above sea level of 815 feet. Within 10 miles also contains very significant variations in elevation (1,608 feet). Within 50 miles contains very significant variations in elevation (3,720 feet).
The area within 2 miles of Dayton is covered by cropland (38%), trees (32%), and artificial surfaces (30%), within 10 miles by trees (62%) and cropland (29%), and within 50 miles by trees (68%) and cropland (26%).
This report illustrates the typical weather in Dayton 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 Dayton.
For each station, the records are corrected for the elevation difference between that station and Dayton 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 Dayton is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Dayton and a given station.
The stations contributing to this reconstruction are: Crossville Memorial Airport (32%, 51 kilometers, north); Lovell Field (38%, 54 kilometers, south); Oak Ridge (17%, 92 kilometers, northeast); and Western Carolina Regional Airport (13%, 109 kilometers, east).
Time zones for aiports and weather stations are provided by AskGeo.com .