Average Weather in August in Rolla North Dakota, United States
Daily high temperatures decrease by 4°F, from 77°F to 73°F, rarely falling below 62°F or exceeding 87°F.
Daily low temperatures decrease by 5°F, from 55°F to 49°F, rarely falling below 40°F or exceeding 62°F.
For reference, on July 25, the hottest day of the year, temperatures in Rolla typically range from 55°F to 77°F, while on January 15, the coldest day of the year, they range from -2°F to 15°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 Rolla experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 27% to 35%.
The clearest day of the month is August 2, with clear, mostly clear, or partly cloudy conditions 73% of the time.
For reference, on February 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 67%, while on July 31, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 73%.
Cloud Cover Categories in August
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Rolla, the chance of a wet day over the course of August is gradually decreasing, starting the month at 25% and ending it at 22%.
For reference, the year's highest daily chance of a wet day is 38% on June 14, and its lowest chance is 4% on February 8.
Probability of Precipitation in August
The average sliding 31-day rainfall during August in Rolla is gradually decreasing, starting the month at 2.0 inches, when it rarely exceeds 3.6 inches or falls below 0.6 inches, and ending the month at 1.7 inches, when it rarely exceeds 3.3 inches or falls below 0.5 inches.
Average Monthly Rainfall in August
Over the course of August in Rolla, 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, 36 minutes, implying an average daily decrease of 3 minutes, 13 seconds, and weekly decrease of 22 minutes, 30 seconds.
The shortest day of the month is August 31, with 13 hours, 28 minutes of daylight and the longest day is August 1, with 15 hours, 4 minutes of daylight.
Hours of Daylight and Twilight in August
The earliest sunrise of the month in Rolla is 6:12 AM on August 1 and the latest sunrise is 42 minutes later at 6:54 AM on August 31.
The latest sunset is 9:16 PM on August 1 and the earliest sunset is 54 minutes earlier at 8:21 PM on August 31.
Daylight saving time is observed in Rolla during 2021, 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 5:34 AM and sets 16 hours, 11 minutes later, at 9:45 PM, while on December 21, the shortest day of the year, it rises at 8:29 AM and sets 8 hours, 15 minutes later, at 4:44 PM.
Sunrise & Sunset with Twilight in August
The figure below presents a compact representation of key lunar data for August 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.
Moon Rise, Set & Phases in August
The chance that a given day will be muggy in Rolla is decreasing during August, falling from 12% to 4% over the course of the month.
For reference, on July 17, the muggiest day of the year, there are muggy conditions 16% of the time, while on October 12, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in August
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Rolla is gradually increasing during August, increasing from 8.6 miles per hour to 9.5 miles per hour over the course of the month.
For reference, on March 31, the windiest day of the year, the daily average wind speed is 12.2 miles per hour, while on July 22, the calmest day of the year, the daily average wind speed is 8.6 miles per hour.
Average Wind Speed in August
The hourly average wind direction in Rolla throughout August is predominantly from the south, with a peak proportion of 32% on August 19.
Wind Direction in August
The growing season in Rolla typically lasts for 4.0 months (124 days), from around May 20 to around September 21, rarely starting before May 2 or after June 5, and rarely ending before September 3 or after October 7.
The month of August in Rolla is very likely fully within the growing season, with the chance that a given day is in the growing season gradually decreasing from 100% to 94% over the course of the month.
Time Spent in Various Temperature Bands and the Growing Season in August
The average accumulated growing degree days in Rolla are increasing during August, increasing by 415°F, from 1,059°F to 1,474°F, over the course of the month.
Growing Degree Days in August
The average daily incident shortwave solar energy in Rolla is decreasing during August, falling by 1.4 kWh, from 6.6 kWh to 5.3 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 Rolla are 48.858 deg latitude, -99.618 deg longitude, and 1,811 ft elevation.
The topography within 2 miles of Rolla contains only modest variations in elevation, with a maximum elevation change of 98 feet and an average elevation above sea level of 1,819 feet. Within 10 miles contains only modest variations in elevation (597 feet). Within 50 miles contains significant variations in elevation (1,362 feet).
The area within 2 miles of Rolla is covered by cropland (95%), within 10 miles by cropland (84%) and trees (14%), and within 50 miles by cropland (76%) and grassland (12%).
This report illustrates the typical weather in Rolla, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Rolla.
For each station, the records are corrected for the elevation difference between that station and Rolla 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 Rolla is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Rolla and a given station.
The stations contributing to this reconstruction are: Rugby Municipal Airport (98%, 2.9 kilometers, north); Cando Municipal Airport (1.3%, 51 kilometers, southeast); and Rugby Municipal Airport (1.0%, 60 kilometers, southwest).
Time zones for airports and weather stations are provided by AskGeo.com .