Average Weather in May in Zillah Washington, United States
In Zillah, the month of May is characterized by rising daily high temperatures, with daily highs increasing by 8°F, from 71°F to 78°F over the course of the month, and rarely exceeding 90°F or dropping below 61°F.
Daily low temperatures increase by 8°F, from 44°F to 51°F, rarely falling below 34°F or exceeding 60°F.
For reference, on July 30, the hottest day of the year, temperatures in Zillah typically range from 60°F to 92°F, while on December 23, the coldest day of the year, they range from 25°F to 36°F.
Average High and Low Temperature in May
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on May. 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 May
The month of May in Zillah experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 47% throughout the month.
The clearest day of the month is May 31, with clear, mostly clear, or partly cloudy conditions 55% of the time.
For reference, on January 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 65%, while on August 4, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 83%.
Cloud Cover in May
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Zillah, the chance of a wet day over the course of May is essentially constant, remaining around 12% throughout.
For reference, the year's highest daily chance of a wet day is 29% on November 28, and its lowest chance is 3% on August 16.
Probability of Precipitation in May
The average sliding 31-day rainfall during May in Zillah is essentially constant, remaining about 0.6 inches throughout, and rarely exceeding 1.2 inches or falling below 0.1 inches.
Average Monthly Rainfall in May
Over the course of May in Zillah, 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, 9 minutes, implying an average daily increase of 2 minutes, 17 seconds, and weekly increase of 16 minutes, 2 seconds.
The shortest day of the month is May 1, with 14 hours, 24 minutes of daylight and the longest day is May 31, with 15 hours, 33 minutes of daylight.
Hours of Daylight and Twilight in May
The latest sunrise of the month in Zillah is 5:46 AM on May 1 and the earliest sunrise is 34 minutes earlier at 5:12 AM on May 31.
The earliest sunset is 8:10 PM on May 1 and the latest sunset is 35 minutes later at 8:45 PM on May 31.
Daylight saving time is observed in Zillah during 2017, but it neither starts nor ends during May, so the entire month is in daylight saving time.
For reference, on June 21, the longest day of the year, the Sun rises at 5:08 AM and sets 15 hours, 49 minutes later, at 8:57 PM, while on December 21, the shortest day of the year, it rises at 7:41 AM and sets 8 hours, 35 minutes later, at 4:17 PM.
Sunrise & Sunset with Twilight in May
The chance that a given day will be muggy in Zillah is essentially constant during May, remaining around 0% throughout.
For reference, on July 15, 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 May
The average hourly wind speed in Zillah is essentially constant during May, remaining around 4.2 miles per hour throughout.
For reference, on March 31, the windiest day of the year, the daily average wind speed is 4.3 miles per hour, while on December 20, the calmest day of the year, the daily average wind speed is 3.6 miles per hour.
Average Wind Speed in May
Wind Direction in May
The average daily incident shortwave solar energy in Zillah is gradually increasing during May, rising by 0.9 kWh, from 6.1 kWh to 7.0 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in May
For the purposes of this report, the geographical coordinates of Zillah are 46.402 deg latitude, -120.262 deg longitude, and 801 ft elevation.
The topography within 2 miles of Zillah contains only modest variations in elevation, with a maximum elevation change of 318 feet and an average elevation above sea level of 813 feet. Within 10 miles contains only modest variations in elevation (2,405 feet). Within 50 miles contains large variations in elevation (6,709 feet).
The area within 2 miles of Zillah is covered by cropland (76%) and artificial surfaces (22%), within 10 miles by cropland (59%) and shrubs (28%), and within 50 miles by shrubs (63%) and cropland (20%).
This report illustrates the typical weather in Zillah 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 Zillah.
For each station, the records are corrected for the elevation difference between that station and Zillah 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 Zillah is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Zillah and a given station.
The stations contributing to this reconstruction are: Yakima Air Terminal Airport (59%, 28 kilometers, northwest); Hanford (24%, 54 kilometers, east); Hermiston Municipal Airport (9%, 100 kilometers, southeast); and The Dalles Municipal Airport (8%, 112 kilometers, southwest).
Time zones for aiports and weather stations are provided by AskGeo.com .