Average Weather in May in Selah Washington, United States
In Selah, the month of May is characterized by rising daily high temperatures, with daily highs increasing by 7°F, from 68°F to 75°F over the course of the month, and rarely exceeding 87°F or dropping below 58°F.
Daily low temperatures increase by 7°F, from 41°F to 49°F, rarely falling below 31°F or exceeding 58°F.
For reference, on August 2, the hottest day of the year, temperatures in Selah typically range from 57°F to 89°F, while on December 23, the coldest day of the year, they range from 23°F to 35°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 Selah experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 48% throughout the month.
The clearest day of the month is May 31, with clear, mostly clear, or partly cloudy conditions 54% 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 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 82%.
Cloud Cover in May
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Selah, the chance of a wet day over the course of May is essentially constant, remaining around 14% throughout.
For reference, the year's highest daily chance of a wet day is 36% on November 27, and its lowest chance is 3% on August 5.
Probability of Precipitation in May
To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.
The average sliding 31-day rainfall during May in Selah is essentially constant, remaining about 0.7 inches throughout, and rarely exceeding 1.4 inches or falling below 0.1 inches.
Average Monthly Rainfall in May
Over the course of May in Selah, 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, 19 seconds, and weekly increase of 16 minutes, 12 seconds.
The shortest day of the month is May 1, with 14 hours, 25 minutes of daylight and the longest day is May 31, with 15 hours, 35 minutes of daylight.
Hours of Daylight and Twilight in May
The latest sunrise of the month in Selah 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 8:12 PM on May 1 and the latest sunset is 35 minutes later at 8:47 PM on May 31.
Daylight saving time is observed in Selah 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, 51 minutes later, at 8:59 PM, while on December 21, the shortest day of the year, it rises at 7:43 AM and sets 8 hours, 33 minutes later, at 4:17 PM.
Sunrise & Sunset with Twilight in May
The chance that a given day will be muggy in Selah is essentially constant during May, remaining around 0% throughout.
For reference, on July 22, 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 Selah is essentially constant during May, remaining around 3.7 miles per hour throughout.
For reference, on June 8, the windiest day of the year, the daily average wind speed is 3.8 miles per hour, while on December 20, the calmest day of the year, the daily average wind speed is 3.0 miles per hour.
The lowest daily average wind speed during May is 3.7 miles per hour on May 17.
Average Wind Speed in May
Wind Direction in May
The average daily incident shortwave solar energy in Selah 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 Selah are 46.654 deg latitude, -120.530 deg longitude, and 1,263 ft elevation.
The topography within 2 miles of Selah contains very significant variations in elevation, with a maximum elevation change of 886 feet and an average elevation above sea level of 1,292 feet. Within 10 miles contains very significant variations in elevation (2,287 feet). Within 50 miles contains large variations in elevation (7,756 feet).
The area within 2 miles of Selah is covered by shrubs (40%), cropland (30%), and artificial surfaces (29%), within 10 miles by shrubs (55%) and cropland (30%), and within 50 miles by shrubs (55%) and trees (24%).
This report illustrates the typical weather in Selah 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 Selah.
For each station, the records are corrected for the elevation difference between that station and Selah 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 Selah is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Selah and a given station.
Time zones for aiports and weather stations are provided by AskGeo.com .