Average Weather in April in Joseph Oregon, United States
Daily high temperatures increase by 9°F, from 49°F to 58°F, rarely falling below 39°F or exceeding 72°F.
Daily low temperatures increase by 5°F, from 29°F to 35°F, rarely falling below 22°F or exceeding 43°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 April
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on April. 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 April
The month of April in Joseph experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 61% to 55%.
The clearest day of the month is April 30, with clear, mostly clear, or partly cloudy conditions 45% 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 April
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 April 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 33% on December 1, and its lowest chance is 7% on August 3.
Over the course of April in Joseph, the chance of a day with only rain increases from 21% to 23%, the chance of a day with mixed snow and rain decreases from 6% to 1%, and the chance of a day with only snow remains an essentially constant 1% throughout.
Probability of Precipitation in April
The average sliding 31-day rainfall during April in Joseph is essentially constant, remaining about 1.4 inches throughout, and rarely exceeding 2.5 inches or falling below 0.4 inches.
Average Monthly Rainfall in April
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 April in Joseph is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.4 inches or falling below -0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in April
Over the course of April 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, 27 minutes, implying an average daily increase of 3 minutes, 1 second, and weekly increase of 21 minutes, 6 seconds.
The shortest day of the month is April 1, with 12 hours, 48 minutes of daylight and the longest day is April 30, with 14 hours, 16 minutes of daylight.
Hours of Daylight and Twilight in April
The latest sunrise of the month in Joseph is 6:29 AM on April 1 and the earliest sunrise is 50 minutes earlier at 5:38 AM on April 30.
The earliest sunset is 7:17 PM on April 1 and the latest sunset is 37 minutes later at 7:54 PM on April 30.
Daylight saving time is observed in Joseph during 2018, but it neither starts nor ends during April, 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 and Daylight Saving Time in April
The chance that a given day will be muggy in Joseph is essentially constant during April, remaining around 0% throughout.
Humidity Comfort Levels in April
The average hourly wind speed in Joseph is essentially constant during April, remaining within 0.2 miles per hour of 5.5 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 April
Wind Direction in April
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.
The month of April in Joseph is very likely fully outside of the growing season, with the chance that a given day is in the growing season gradually increasing from 0% to 7% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in April
The average accumulated growing degree days in Joseph are gradually increasing during April, increasing by 42°F, from 9°F to 52°F, over the course of the month.
Growing Degree Days in April
The average daily incident shortwave solar energy in Joseph is increasing during April, rising by 1.3 kWh, from 4.6 kWh to 6.0 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in April
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 .