This report describes the typical weather at the Jackson Hole Airport (Jackson Hole, Wyoming, United States) weather station over the course of an average July. It is based on the historical records from 2012 to 2015. Earlier records are either unavailable or unreliable.
Jackson Hole, Wyoming has a humid subarctic continental climate with cool summers and no dry season. The area within 25 mi of this station is covered by forests (85%), croplands (9%), grasslands (4%), and lakes and rivers (2%).
The month of July is characterized by gradually rising daily high temperatures, with daily highs around 77°F throughout the month, exceeding 85°F or dropping below 70°F only one day in ten.
Over the course of July, the length of the day is gradually decreasing. From the start to the end of the month, the length of the day decreases by 47 minutes, implying an average day-over-day decrease of 1.5 minutes.
The shortest day of the month is July 31 with 14:36 hours of daylight; the longest day is July 1 with 15:23 hours of daylight.
The earliest sunrise is at 5:46am on July 1; the latest sunset is at 9:08pm on July 2; the latest sunrise is at 6:11am on July 31; the earliest sunset is at 8:47pm on July 31.
Daylight saving time is observed in 2015 but it neither starts nor ends in July, so the entire month is in daylight time.
The median cloud cover is 14% (mostly clear) and does not vary substantially over the course of the month.
On July 16, a representative day, the sky is clear or mostly clear 74% of the time, partly cloudy 10% of the time, and mostly cloudy or overcast 16% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around July 31, occurring in 24% of days. Precipitation is least likely around July 1, occurring in 14% of days.
Throughout July, the most common forms of precipitation are thunderstorms and light rain.
Thunderstorms are the most severe precipitation observed during 83% of those days with precipitation. They are most likely around July 31, when it is observed during 19% of all days.
Light rain is the most severe precipitation observed during 13% of those days with precipitation. It is most likely around July 21, when it is observed during 3% of all days.
Either snow is exceptionally unlikely to fall at this location in July or this station does not reliably report precipitation types.
The relative humidity typically ranges from 23% (dry) to 88% (very humid) over the course of a typical July, rarely dropping below 15% (dry), or exceeding 94% (very humid).
The air is driest around July 29, at which time the relative humidity drops below 27% (dry) three days out of four; it is most humid around July 7, rising above 84% (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 July, the dew point typically varies from 33°F (dry) to 50°F (dry) and is rarely below 26°F (dry) or above 53°F (very comfortable).
Over the course of July typical wind speeds vary from 0 mph to 16 mph (calm to moderate breeze), rarely exceeding 19 mph (fresh breeze).
The highest average wind speed of 6 mph (light breeze) occurs around July 4, at which time the average daily maximum wind speed is 16 mph (moderate breeze).
The lowest average wind speed of 5 mph (light breeze) occurs around July 18, at which time the average daily maximum wind speed is 14 mph (moderate breeze).