Average Weather in August in Altamont Oregon, United States
In Altamont, the month of August is characterized by falling daily high temperatures, with daily highs decreasing by 5°F, from 85°F to 80°F over the course of the month, and rarely exceeding 93°F or dropping below 70°F. The highest daily average high temperature is 85°F on August 4.
Daily low temperatures decrease by 5°F, from 51°F to 46°F, rarely falling below 39°F or exceeding 58°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 August
The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on August. 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 August
The month of August in Altamont experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 13% to 18%. The lowest chance of overcast or mostly cloudy conditions is 13% on August 3.
The clearest day of the month is August 3, with clear, mostly clear, or partly cloudy conditions 87% 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 Categories in August
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 August is essentially constant, remaining around 5% throughout.
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.
Probability of Precipitation in August
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 August in Altamont is essentially constant, remaining about 0.3 inches throughout, and rarely exceeding 1.0 inches or falling below -0.0 inches.
The lowest average 31-day accumulation is 0.2 inches on August 1.
Average Monthly Rainfall in August
Over the course of August in Altamont, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 15 minutes, implying an average daily decrease of 2 minutes, 30 seconds, and weekly decrease of 17 minutes, 33 seconds.
The shortest day of the month is August 31, with 13 hours, 10 minutes of daylight and the longest day is August 1, with 14 hours, 25 minutes of daylight.
Hours of Daylight and Twilight in August
The earliest sunrise of the month in Altamont is 6:00 AM on August 1 and the latest sunrise is 31 minutes later at 6:31 AM on August 31.
The latest sunset is 8:25 PM on August 1 and the earliest sunset is 44 minutes earlier at 7:41 PM on August 31.
Daylight saving time is observed in Altamont during 2017, but it neither starts nor ends during August, 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 in August
The chance that a given day will be muggy in Altamont is essentially constant during August, 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 August
The average hourly wind speed in Altamont is essentially constant during August, remaining within 0.1 miles per hour of 5.0 miles per hour throughout.
For reference, on March 16, the windiest day of the year, the daily average wind speed is 6.9 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 4.9 miles per hour.
The lowest daily average wind speed during August is 4.9 miles per hour on August 3.
Average Wind Speed in August
Wind Direction in August
The average daily incident shortwave solar energy in Altamont is decreasing during August, falling by 1.3 kWh, from 7.9 kWh to 6.6 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in August
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 .