Average Weather in April in Altamont Oregon, United States
In Altamont, the month of April is characterized by rising daily high temperatures, with daily highs increasing by 7°F, from 54°F to 61°F over the course of the month, and rarely exceeding 75°F or dropping below 42°F.
Daily low temperatures increase by 5°F, from 30°F to 35°F, rarely falling below 22°F or exceeding 44°F.
For reference, on August 4, the hottest day of the year, temperatures in Altamont typically range from 50°F to 85°F, while on December 23, the coldest day of the year, they range from 22°F to 38°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 Altamont experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 57% 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 10, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 67%, while on August 3, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 87%.
Cloud Cover in April
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Altamont, the chance of a wet day over the course of April is gradually decreasing, starting the month at 22% and ending it at 18%.
For reference, the year's highest daily chance of a wet day is 33% on November 30, and its lowest chance is 4% on August 4.
Over the course of April in Altamont, the chance of a day with only rain remains an essentially constant 18% throughout, the chance of a day with mixed snow and rain decreases from 4% to 1%, and the chance of a day with only snow remains an essentially constant 0% throughout.
Probability of Precipitation in April
The average sliding 31-day rainfall during April in Altamont is essentially constant, remaining about 1.2 inches throughout, and rarely exceeding 2.6 inches or falling below 0.3 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 Altamont is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.3 inches or falling below -0.0 inches.
Average Monthly Liquid-Equivalent Snowfall in April
Over the course of April in Altamont, 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, 18 minutes, implying an average daily increase of 2 minutes, 41 seconds, and weekly increase of 18 minutes, 49 seconds.
The shortest day of the month is April 1, with 12 hours, 44 minutes of daylight and the longest day is April 30, with 14 hours, 2 minutes of daylight.
Hours of Daylight and Twilight in April
The latest sunrise of the month in Altamont is 6:48 AM on April 1 and the earliest sunrise is 46 minutes earlier at 6:03 AM on April 30.
The earliest sunset is 7:33 PM on April 1 and the latest sunset is 32 minutes later at 8:05 PM on April 30.
Daylight saving time is observed in Altamont during 2017, 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 5:30 AM and sets 15 hours, 16 minutes later, at 8:46 PM, while on December 21, the shortest day of the year, it rises at 7:32 AM and sets 9 hours, 6 minutes later, at 4:38 PM.
Sunrise & Sunset with Twilight and Daylight Saving Time in April
The chance that a given day will be muggy in Altamont is essentially constant during April, remaining around 0% throughout.
For reference, on July 9, 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 Altamont is essentially constant during April, remaining within 0.1 miles per hour of 3.6 miles per hour throughout.
For reference, on March 16, the windiest day of the year, the daily average wind speed is 3.7 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 2.6 miles per hour.
Average Wind Speed in April
Wind Direction in April
The average daily incident shortwave solar energy in Altamont is increasing during April, rising by 1.3 kWh, from 5.1 kWh to 6.4 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 Altamont are 42.207 deg latitude, -121.737 deg longitude, and 4,150 ft elevation.
The topography within 2 miles of Altamont contains significant variations in elevation, with a maximum elevation change of 627 feet and an average elevation above sea level of 4,168 feet. Within 10 miles contains significant variations in elevation (2,415 feet). Within 50 miles contains large variations in elevation (7,825 feet).
The area within 2 miles of Altamont is covered by artificial surfaces (49%), shrubs (37%), and cropland (10%), within 10 miles by shrubs (53%) and cropland (31%), and within 50 miles by shrubs (52%) and trees (33%).
This report illustrates the typical weather in Altamont 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Altamont.
For each station, the records are corrected for the elevation difference between that station and Altamont 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 Altamont is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Altamont and a given station.
Time zones for aiports and weather stations are provided by AskGeo.com .