Average Weather in April in Athena Oregon, United States
Daily high temperatures increase by 8°F, from 57°F to 64°F, rarely falling below 48°F or exceeding 77°F.
Daily low temperatures increase by 5°F, from 38°F to 43°F, rarely falling below 30°F or exceeding 50°F.
For reference, on August 2, the hottest day of the year, temperatures in Athena typically range from 58°F to 88°F, while on December 29, the coldest day of the year, they range from 28°F to 37°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 Athena experiences decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 60% to 52%.
The clearest day of the month is April 30, with clear, mostly clear, or partly cloudy conditions 48% of the time.
For reference, on January 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 66%, 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 Athena, the chance of a wet day over the course of April is gradually decreasing, starting the month at 24% and ending it at 20%.
For reference, the year's highest daily chance of a wet day is 35% on December 1, and its lowest chance is 6% on August 4.
Probability of Precipitation in April
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 April in Athena is essentially constant, remaining about 1.2 inches throughout, and rarely exceeding 2.4 inches or falling below 0.4 inches.
The lowest average 31-day accumulation is 1.1 inches on April 16.
Average Monthly Rainfall in April
Over the course of April in Athena, 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, 29 minutes, implying an average daily increase of 3 minutes, 4 seconds, and weekly increase of 21 minutes, 27 seconds.
The shortest day of the month is April 1, with 12 hours, 49 minutes of daylight and the longest day is April 30, with 14 hours, 18 minutes of daylight.
Hours of Daylight and Twilight in April
The latest sunrise of the month in Athena is 6:33 AM on April 1 and the earliest sunrise is 51 minutes earlier at 5:42 AM on April 30.
The earliest sunset is 7:22 PM on April 1 and the latest sunset is 38 minutes later at 8:00 PM on April 30.
Daylight saving time is observed in Athena 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 5:03 AM and sets 15 hours, 44 minutes later, at 8:47 PM, while on December 21, the shortest day of the year, it rises at 7:32 AM and sets 8 hours, 40 minutes later, at 4:12 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in April
The chance that a given day will be muggy in Athena is essentially constant during April, remaining around 0% throughout.
For reference, on August 24, 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 April
The average hourly wind speed in Athena is gradually decreasing during April, decreasing from 7.9 miles per hour to 7.3 miles per hour over the course of the month.
For reference, on December 1, the windiest day of the year, the daily average wind speed is 8.9 miles per hour, while on August 27, the calmest day of the year, the daily average wind speed is 6.6 miles per hour.
Average Wind Speed in April
Wind Direction in April
The growing season in Athena typically lasts for 6.1 months (187 days), from around April 16 to around October 19, rarely starting before March 24 or after May 7, and rarely ending before October 1 or after November 7.
During April in Athena, the chance that a given day is within the growing season is very rapidly increasing rising from 20% to 79% 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 Athena are gradually increasing during April, increasing by 96°F, from 45°F to 141°F, over the course of the month.
Growing Degree Days in April
The average daily incident shortwave solar energy in Athena is increasing during April, rising by 1.4 kWh, from 4.4 kWh to 5.9 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 Athena are 45.812 deg latitude, -118.491 deg longitude, and 1,821 ft elevation.
The topography within 2 miles of Athena contains only modest variations in elevation, with a maximum elevation change of 410 feet and an average elevation above sea level of 1,805 feet. Within 10 miles contains only modest variations in elevation (2,861 feet). Within 50 miles contains large variations in elevation (6,614 feet).
The area within 2 miles of Athena is covered by cropland (94%), within 10 miles by cropland (67%) and grassland (20%), and within 50 miles by shrubs (42%) and cropland (28%).
This report illustrates the typical weather in Athena 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 Athena.
For each station, the records are corrected for the elevation difference between that station and Athena 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 Athena is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Athena and a given station.
The stations contributing to this reconstruction are: Eastern Oregon Regional Airport (43%, 31 kilometers, southwest); Meacham, Meacham (15%, 34 kilometers, south); Walla Walla Regional Airport (31%, 35 kilometers, northeast); and Tri-Cities Airport (11%, 70 kilometers, northwest).
Time zones for aiports and weather stations are provided by AskGeo.com .