This report describes the typical weather at the Skagway Airport (Skagway, Alaska, United States) weather station over the course of an average July. It is based on the historical records from 1996 to 2012. Earlier records are either unavailable or unreliable.
Skagway, Alaska has a continental climate with dry warm summers. The area within 25 mi of this station is covered by tundra (90%), oceans and seas (6%), and lakes and rivers (2%).
The month of July is characterized by essentially constant daily high temperatures, with daily highs around 63°F throughout the month, exceeding 72°F or dropping below 57°F only one day in ten.
Over the course of July, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1:46 hours, implying an average day-over-day decrease of 3.4 minutes.
The shortest day of the month is July 31 with 16:44 hours of daylight; the longest day is July 1 with 18:30 hours of daylight.
The earliest sunrise is at 3:50am on July 1; the latest sunset is at 10:20pm on July 2; the latest sunrise is at 4:44am on July 31; the earliest sunset is at 9:28pm on July 31.
Daylight savings time is observed in 2012 but it neither starts nor ends in July, so the entire month is in daylight time.
The median cloud cover is 93% (mostly cloudy) and does not vary substantially over the course of the month.
On July 16, a representative day, the sky is clear or mostly clear 27% of the time, partly cloudy 3% of the time, and mostly cloudy or overcast 64% 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 52% of days. Precipitation is least likely around July 7, occurring in 46% of days.
Throughout July, the most common forms of precipitation are light rain and moderate rain.
Light rain is the most severe precipitation observed during 80% of those days with precipitation. It is most likely around July 31, when it is observed during 41% of all days.
Moderate rain is the most severe precipitation observed during 18% of those days with precipitation. It is most likely around July 28, when it is observed during 10% 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 56% (mildly humid) to 91% (very humid) over the course of a typical July, rarely dropping below 42% (comfortable) and reaching as high as 100% (very humid).
The air is driest around July 1, at which time the relative humidity drops below 64% (mildly humid) three days out of four; it is most humid around July 31, rising above 87% (very 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 45°F (dry) to 52°F (very comfortable) and is rarely below 41°F (dry) or above 55°F (very comfortable).
The time of the month between July 1 and July 31 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of July typical wind speeds vary from 0 mph to 20 mph (calm to fresh breeze), rarely exceeding 25 mph (strong breeze).
The highest average wind speed of 10 mph (gentle breeze) occurs around July 19, at which time the average daily maximum wind speed is 20 mph (fresh breeze).
The lowest average wind speed of 9 mph (gentle breeze) occurs around July 30, at which time the average daily maximum wind speed is 20 mph (fresh breeze).