This report describes the typical weather at the Sheridan County Airport (Sheridan, Wyoming, United States) weather station over the course of an average August. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Sheridan, Wyoming has a humid continental climate with warm summers and no dry season. The area within 25 mi of this station is covered by grasslands (62%), forests (33%), and shrublands (3%).
The month of August is characterized by falling daily high temperatures, with daily highs decreasing from 87°F to 82°F over the course of the month, exceeding 96°F or dropping below 69°F only one day in ten.
Over the course of August, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 1:23 hours, implying an average day-over-day decrease of 2.7 minutes.
The shortest day of the month is August 31 with 13:16 hours of daylight; the longest day is August 1 with 14:39 hours of daylight.
The earliest sunrise is at 5:54am on August 1; the latest sunset is at 8:33pm on August 1; the latest sunrise is at 6:30am on August 31; the earliest sunset is at 7:46pm on August 31.
Daylight savings time is observed in 2012 but it neither starts nor ends in August, so the entire month is in daylight time.
The median cloud cover is 25% (mostly clear) and does not vary substantially over the course of the month.
On August 16, a representative day, the sky is clear or mostly clear 54% of the time, partly cloudy 18% of the time, and mostly cloudy or overcast 24% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around August 1, occurring in 38% of days. Precipitation is least likely around August 31, occurring in 33% of days.
Throughout August, the most common forms of precipitation are thunderstorms and light rain.
Thunderstorms are the most severe precipitation observed during 59% of those days with precipitation. They are most likely around August 1, when it is observed during 26% of all days.
Light rain is the most severe precipitation observed during 32% of those days with precipitation. It is most likely around August 30, when it is observed during 13% of all days.
Either snow is exceptionally unlikely to fall at this location in August or this station does not reliably report precipitation types.
The relative humidity typically ranges from 25% (dry) to 84% (humid) over the course of a typical August, rarely dropping below 13% (very dry) and reaching as high as 100% (very humid).
The air is driest around August 26, at which time the relative humidity drops below 30% (dry) three days out of four; it is most humid around August 11, rising above 73% (humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical August, the dew point typically varies from 37°F (dry) to 55°F (very comfortable) and is rarely below 28°F (dry) or above 61°F (comfortable).
The time of the month between August 1 and August 26 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of August typical wind speeds vary from 0 mph to 16 mph (calm to moderate breeze), rarely exceeding 24 mph (strong breeze).
The highest average wind speed of 7 mph (light breeze) occurs around August 8, at which time the average daily maximum wind speed is 16 mph (moderate breeze).
The lowest average wind speed of 7 mph (light breeze) occurs around August 1, at which time the average daily maximum wind speed is 15 mph (moderate breeze).