Average Weather in January in Richland Washington, United States
Daily high temperatures increase by 5°F, from 39°F to 44°F, rarely falling below 25°F or exceeding 55°F.
Daily low temperatures increase by 3°F, from 27°F to 30°F, rarely falling below 13°F or exceeding 39°F.
For reference, on July 31, the hottest day of the year, temperatures in Richland typically range from 61°F to 94°F, while on December 30, the coldest day of the year, they range from 27°F to 39°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 Richland experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 65% throughout the month. The highest chance of overcast or mostly cloudy conditions is 66% on January 16.
The clearest day of the month is January 30, with clear, mostly clear, or partly cloudy conditions 37% of the time.
For reference, on January 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 66%, while on July 29, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 82%.
Cloud Cover Categories in January
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Richland, the chance of a wet day over the course of January is gradually decreasing, starting the month at 19% and ending it at 17%.
For reference, the year's highest daily chance of a wet day is 22% on December 1, and its lowest chance is 3% on August 17.
Over the course of January in Richland, the chance of a day with only rain remains an essentially constant 11% 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 decreases from 5% to 3%.
Probability of Precipitation in January
The average sliding 31-day rainfall during January in Richland is essentially constant, remaining about 0.6 inches throughout, and rarely exceeding 1.4 inches or falling below 0.1 inches.
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 Richland is essentially constant, remaining about 0.2 inches throughout, and rarely exceeding 0.8 inches or falling to 0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in January
Over the course of January in Richland, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 58 minutes, implying an average daily increase of 1 minute, 56 seconds, and weekly increase of 13 minutes, 31 seconds.
The shortest day of the month is January 1, with 8 hours, 41 minutes of daylight and the longest day is January 31, with 9 hours, 39 minutes of daylight.
Hours of Daylight and Twilight in January
The latest sunrise of the month in Richland is 7:40 AM on January 1 and the earliest sunrise is 19 minutes earlier at 7:21 AM on January 31.
The earliest sunset is 4:21 PM on January 1 and the latest sunset is 39 minutes later at 5:00 PM on January 31.
Daylight saving time is observed in Richland 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 5:05 AM and sets 15 hours, 48 minutes later, at 8:52 PM, while on December 21, the shortest day of the year, it rises at 7:37 AM and sets 8 hours, 36 minutes later, at 4:13 PM.
Sunrise & Sunset with Twilight in January
The chance that a given day will be muggy in Richland is essentially constant during January, remaining around 0% throughout.
For reference, on July 23, the muggiest day of the year, there are muggy conditions 0% 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 Richland is essentially constant during January, remaining within 0.1 miles per hour of 7.3 miles per hour throughout.
For reference, on March 27, the windiest day of the year, the daily average wind speed is 8.4 miles per hour, while on September 9, the calmest day of the year, the daily average wind speed is 6.7 miles per hour.
The lowest daily average wind speed during January is 7.2 miles per hour on January 5.
Average Wind Speed in January
Wind Direction in January
The growing season in Richland typically lasts for 6.0 months (181 days), from around April 17 to around October 15, rarely starting before March 28 or after May 7, and rarely ending before September 26 or after November 2.
The month of January in Richland 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 Richland are essentially constant during January, remaining within 3°F of 3°F throughout.
Growing Degree Days in January
The average daily incident shortwave solar energy in Richland is gradually increasing during January, rising by 0.6 kWh, from 1.3 kWh to 1.9 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 Richland are 46.286 deg latitude, -119.284 deg longitude, and 390 ft elevation.
The topography within 2 miles of Richland contains only modest variations in elevation, with a maximum elevation change of 108 feet and an average elevation above sea level of 375 feet. Within 10 miles contains only modest variations in elevation (1,467 feet). Within 50 miles contains very significant variations in elevation (3,940 feet).
The area within 2 miles of Richland is covered by artificial surfaces (74%), cropland (16%), and water (11%), within 10 miles by cropland (36%) and shrubs (35%), and within 50 miles by shrubs (46%) and cropland (40%).
This report illustrates the typical weather in Richland 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Richland.
For each station, the records are corrected for the elevation difference between that station and Richland 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 Richland is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Richland and a given station.
The stations contributing to this reconstruction are: Tri-Cities Airport (77%, 13 kilometers, east); Hanford (14%, 40 kilometers, northwest); and Hermiston Municipal Airport (10%, 51 kilometers, south).
Time zones for aiports and weather stations are provided by AskGeo.com .