Average Weather in January in Chelan Washington, United States
Daily high temperatures increase by 5°F, from 30°F to 35°F, rarely falling below 19°F or exceeding 43°F.
Daily low temperatures increase by 3°F, from 21°F to 24°F, rarely falling below 8°F or exceeding 33°F.
For reference, on August 2, the hottest day of the year, temperatures in Chelan typically range from 60°F to 88°F, while on December 30, the coldest day of the year, they range from 21°F to 30°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
Pietroasele, Romania (5,710 miles away); Kemaliye, Turkey (6,282 miles); and Isfana, Kyrgyzstan (6,357 miles) are the far-away foreign places with temperatures most similar to Chelan (view comparison).
The month of January in Chelan experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 66% throughout the month. The highest chance of overcast or mostly cloudy conditions is 67% on January 15.
The clearest day of the month is January 26, with clear, mostly clear, or partly cloudy conditions 35% of the time.
For reference, on January 15, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 67%, while on August 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 80%.
Cloud Cover Categories in January
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Chelan, the chance of a wet day over the course of January is gradually decreasing, starting the month at 28% and ending it at 24%.
For reference, the year's highest daily chance of a wet day is 32% on December 1, and its lowest chance is 5% on August 17.
Over the course of January in Chelan, the chance of a day with only rain increases from 4% to 9%, the chance of a day with mixed snow and rain remains an essentially constant 6% throughout, and the chance of a day with only snow decreases from 19% to 9%.
Probability of Precipitation in January
The average sliding 31-day rainfall during January in Chelan is essentially constant, remaining about 0.6 inches throughout, and rarely exceeding 1.8 inches.
The lowest average 31-day accumulation is 0.6 inches on January 4.
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 Chelan is decreasing, starting the month at 1.2 inches, when it rarely exceeds 2.1 inches or falls below 0.3 inches, and ending the month at 0.7 inches, when it rarely exceeds 1.5 inches or falls below 0.1 inches.
Average Monthly Liquid-Equivalent Snowfall in January
Over the course of January in Chelan, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 2 minutes, implying an average daily increase of 2 minutes, 4 seconds, and weekly increase of 14 minutes, 26 seconds.
The shortest day of the month is January 1, with 8 hours, 29 minutes of daylight and the longest day is January 31, with 9 hours, 31 minutes of daylight.
Hours of Daylight and Twilight in January
The latest sunrise of the month in Chelan is 7:49 AM on January 1 and the earliest sunrise is 21 minutes earlier at 7:28 AM on January 31.
The earliest sunset is 4:18 PM on January 1 and the latest sunset is 41 minutes later at 4:59 PM on January 31.
Daylight saving time is observed in Chelan 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 5:01 AM and sets 16 hours, 1 minute later, at 9:02 PM, while on December 21, the shortest day of the year, it rises at 7:46 AM and sets 8 hours, 24 minutes later, at 4:10 PM.
Sunrise & Sunset with Twilight in January
The chance that a given day will be muggy in Chelan is essentially constant during January, remaining around 0% throughout.
For reference, on July 29, 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 Chelan is essentially constant during January, remaining within 0.1 miles per hour of 4.3 miles per hour throughout.
For reference, on May 7, the windiest day of the year, the daily average wind speed is 5.7 miles per hour, while on January 6, the calmest day of the year, the daily average wind speed is 4.2 miles per hour.
The lowest daily average wind speed during January is 4.2 miles per hour on January 6.
Average Wind Speed in January
Wind Direction in January
The growing season in Chelan typically lasts for 6.2 months (188 days), from around April 16 to around October 22, rarely starting before March 28 or after May 7, and rarely ending before October 6 or after November 7.
The month of January in Chelan 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 Chelan are essentially constant during January, remaining around 0°F throughout.
Growing Degree Days in January
The average daily incident shortwave solar energy in Chelan is gradually increasing during January, rising by 0.6 kWh, from 1.2 kWh to 1.8 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 Chelan are 47.841 deg latitude, -120.016 deg longitude, and 1,640 ft elevation.
The topography within 2 miles of Chelan contains large variations in elevation, with a maximum elevation change of 2,310 feet and an average elevation above sea level of 1,553 feet. Within 10 miles contains large variations in elevation (4,416 feet). Within 50 miles also contains extreme variations in elevation (8,799 feet).
The area within 2 miles of Chelan is covered by grassland (45%) and shrubs (36%), within 10 miles by shrubs (42%) and grassland (23%), and within 50 miles by shrubs (47%) and trees (18%).
This report illustrates the typical weather in Chelan 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 Chelan.
For each station, the records are corrected for the elevation difference between that station and Chelan 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 Chelan is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Chelan and a given station.
The stations contributing to this reconstruction are: Pangborn Field (43%, 51 kilometers, south); Ephrata Municipal Airport (27%, 70 kilometers, southeast); Omak Airport (23%, 79 kilometers, northeast); and Arlington Municipal Airport (7%, 164 kilometers, west).
Time zones for aiports and weather stations are provided by AskGeo.com .