Average Weather in January in West Longview Washington, United States
Daily high temperatures increase by 4°F, from 45°F to 49°F, rarely falling below 37°F or exceeding 56°F.
Daily low temperatures are around 36°F, rarely falling below 25°F or exceeding 45°F.
For reference, on August 2, the hottest day of the year, temperatures in West Longview typically range from 55°F to 79°F, while on January 1, the coldest day of the year, they range from 35°F to 45°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 West Longview experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 77% throughout the month. The highest chance of overcast or mostly cloudy conditions is 79% on January 14.
The clearest day of the month is January 30, with clear, mostly clear, or partly cloudy conditions 24% of the time.
For reference, on January 14, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 79%, while on August 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 78%.
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 West Longview, the chance of a wet day over the course of January is decreasing, starting the month at 54% and ending it at 48%.
For reference, the year's highest daily chance of a wet day is 60% on November 18, and its lowest chance is 6% on August 3.
Over the course of January in West Longview, the chance of a day with only rain decreases from 49% to 45%, 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 West Longview is decreasing, starting the month at 8.4 inches, when it rarely exceeds 12.6 inches or falls below 3.8 inches, and ending the month at 7.4 inches, when it rarely exceeds 12.6 inches or falls below 2.9 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 West Longview 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 8.
Average Monthly Liquid-Equivalent Snowfall in January
Over the course of January in West Longview, 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, 55 seconds, and weekly increase of 13 minutes, 27 seconds.
The shortest day of the month is January 1, with 8 hours, 42 minutes of daylight and the longest day is January 31, with 9 hours, 40 minutes of daylight.
Hours of Daylight and Twilight in January
The latest sunrise of the month in West Longview is 7:54 AM on January 1 and the earliest sunrise is 19 minutes earlier at 7:35 AM on January 31.
The earliest sunset is 4:37 PM on January 1 and the latest sunset is 39 minutes later at 5:15 PM on January 31.
Daylight saving time is observed in West Longview 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 5:20 AM and sets 15 hours, 47 minutes later, at 9:07 PM, while on December 21, the shortest day of the year, it rises at 7:51 AM and sets 8 hours, 37 minutes later, at 4:28 PM.
Sunrise & Sunset with Twilight in January
The chance that a given day will be muggy in West Longview is essentially constant during January, remaining around 0% throughout.
For reference, on August 5, the muggiest day of the year, there are muggy conditions 1% of the time, while on November 6, 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 West Longview is essentially constant during January, remaining within 0.1 miles per hour of 4.8 miles per hour throughout.
For reference, on December 4, the windiest day of the year, the daily average wind speed is 5.0 miles per hour, while on August 24, the calmest day of the year, the daily average wind speed is 3.5 miles per hour.
Average Wind Speed in January
Wind Direction in January
West Longview is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.
The average surface water temperature in West Longview is essentially constant during January, remaining around 48°F throughout.
Average Water Temperature in January
The growing season in West Longview typically lasts for 7.1 months (216 days), from around April 2 to around November 5, rarely starting before March 4 or after April 26, and rarely ending before October 14 or after November 30.
The month of January in West Longview 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 West Longview 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 West Longview is gradually increasing during January, rising by 0.5 kWh, from 0.9 kWh to 1.5 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 West Longview are 46.168 deg latitude, -122.999 deg longitude, and 20 ft elevation.
The topography within 2 miles of West Longview contains very significant variations in elevation, with a maximum elevation change of 866 feet and an average elevation above sea level of 130 feet. Within 10 miles contains very significant variations in elevation (2,283 feet). Within 50 miles contains large variations in elevation (8,284 feet).
The area within 2 miles of West Longview is covered by cropland (46%), herbaceous vegetation (29%), and trees (12%), within 10 miles by trees (50%) and shrubs (20%), and within 50 miles by trees (53%) and shrubs (25%).
This report illustrates the typical weather in West Longview 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 West Longview.
For each station, the records are corrected for the elevation difference between that station and West Longview 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 West Longview is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between West Longview and a given station.
The stations contributing to this reconstruction are: Southwest Washington Regional Airport (85%, 10 kilometers, southeast); South Lewis County Airport (11%, 38 kilometers, north); and Clatsop County Airport (4.7%, 68 kilometers, west).
Time zones for aiports and weather stations are provided by AskGeo.com .