Average Weather in May in Joseph Oregon, United States
Daily high temperatures increase by 7°F, from 58°F to 65°F, rarely falling below 46°F or exceeding 78°F.
Daily low temperatures increase by 7°F, from 35°F to 42°F, rarely falling below 27°F or exceeding 49°F.
For reference, on August 2, the hottest day of the year, temperatures in Joseph typically range from 49°F to 83°F, while on December 29, the coldest day of the year, they range from 19°F to 29°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 Joseph experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 54% throughout the month.
The clearest day of the month is May 31, with clear, mostly clear, or partly cloudy conditions 48% of the time.
For reference, on January 10, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 67%, 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 May
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Joseph, the chance of a wet day over the course of May is increasing, starting the month at 24% and ending it at 30%.
For reference, the year's highest daily chance of a wet day is 33% on December 1, and its lowest chance is 7% on August 3.
Over the course of May in Joseph, the chance of a day with only rain increases from 23% to 30%, the chance of a day with mixed snow and rain remains an essentially constant 1% throughout, and the chance of a day with only snow remains an essentially constant 0% throughout.
Probability of Precipitation in May
The average sliding 31-day rainfall during May in Joseph is gradually increasing, starting the month at 1.5 inches, when it rarely exceeds 2.5 inches or falls below 0.5 inches, and ending the month at 1.8 inches, when it rarely exceeds 3.1 inches or falls below 0.7 inches.
The highest average 31-day accumulation is 1.8 inches on May 23.
Average Monthly Rainfall in May
Over the course of May in Joseph, 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, 6 minutes, implying an average daily increase of 2 minutes, 12 seconds, and weekly increase of 15 minutes, 25 seconds.
The shortest day of the month is May 1, with 14 hours, 18 minutes of daylight and the longest day is May 31, with 15 hours, 24 minutes of daylight.
Hours of Daylight and Twilight in May
The latest sunrise of the month in Joseph is 5:37 AM on May 1 and the earliest sunrise is 33 minutes earlier at 5:04 AM on May 31.
The earliest sunset is 7:55 PM on May 1 and the latest sunset is 34 minutes later at 8:29 PM on May 31.
Daylight saving time is observed in Joseph during 2018, 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 5:00 AM and sets 15 hours, 40 minutes later, at 8:40 PM, while on December 21, the shortest day of the year, it rises at 7:25 AM and sets 8 hours, 43 minutes later, at 4:08 PM.
Sunrise & Sunset with Twilight in May
The chance that a given day will be muggy in Joseph is essentially constant during May, remaining around 0% throughout.
Humidity Comfort Levels in May
The average hourly wind speed in Joseph is essentially constant during May, remaining within 0.2 miles per hour of 5.0 miles per hour throughout.
For reference, on December 30, the windiest day of the year, the daily average wind speed is 6.7 miles per hour, while on August 10, the calmest day of the year, the daily average wind speed is 4.1 miles per hour.
Average Wind Speed in May
Wind Direction in May
The growing season in Joseph typically lasts for 3.8 months (116 days), from around May 24 to around September 17, rarely starting before May 3 or after June 13, and rarely ending before August 30 or after October 5.
During May in Joseph, the chance that a given day is within the growing season is very rapidly increasing rising from 8% to 67% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in May
The average accumulated growing degree days in Joseph are gradually increasing during May, increasing by 122°F, from 54°F to 176°F, over the course of the month.
Growing Degree Days in May
The average daily incident shortwave solar energy in Joseph is gradually increasing during May, rising by 0.7 kWh, from 6.0 kWh to 6.7 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 Joseph are 45.354 deg latitude, -117.230 deg longitude, and 4,206 ft elevation.
The topography within 2 miles of Joseph contains very significant variations in elevation, with a maximum elevation change of 883 feet and an average elevation above sea level of 4,198 feet. Within 10 miles contains very significant variations in elevation (6,293 feet). Within 50 miles also contains extreme variations in elevation (8,940 feet).
The area within 2 miles of Joseph is covered by cropland (63%), grassland (20%), and shrubs (16%), within 10 miles by shrubs (33%) and trees (28%), and within 50 miles by shrubs (51%) and trees (29%).
This report illustrates the typical weather in Joseph 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 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Joseph.
For each station, the records are corrected for the elevation difference between that station and Joseph 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 Joseph is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Joseph and a given station.
The stations contributing to this reconstruction are: La Grande Municipal Airport (28%, 61 kilometers, west); Baker Municipal Airport (28%, 73 kilometers, southwest); McCall Airport (17%, 103 kilometers, southeast); Idaho County Airport (16%, 108 kilometers, northeast); and Lewiston–Nez Perce County Airport (11%, 115 kilometers, north).
Time zones for aiports and weather stations are provided by AskGeo.com .