This report describes the typical weather at the Walvis Bay Airport (Walvis Bay, Namibia) weather station over the course of an average July. It is based on the historical records from 2010 to 2013. Earlier records are either unavailable or unreliable.
Walvis Bay has a hot desert climate. The area within 25 mi of this station is covered by oceans and seas (94%) and lakes and rivers (5%).
The month of July is characterized by gradually falling daily high temperatures, with daily highs ranging from 75°F to 72°F over the course of the month, exceeding 86°F or dropping below 65°F only one day in ten.
Over the course of July, the length of the day is essentially constant. The shortest day of the month is July 1 with 10:44 hours of daylight; the longest day is July 31 with 11:04 hours of daylight.
The earliest sunrise is at 6:36am on July 31; the latest sunset is at 5:40pm on July 30; the latest sunrise is at 6:43am on July 2; the earliest sunset is at 5:27pm on July 1.
Daylight saving time is observed in 2013 but it neither starts nor ends in July, so the entire month is in standard time.
The median cloud cover is 100% (overcast) and does not vary substantially over the course of the month.
On July 16, a representative day, the sky is clear or mostly clear 1% of the time, partly cloudy 1% of the time, and mostly cloudy or overcast 71% of the time.
The average probability that some form of precipitation will be observed in a given day is 0%, with little variation over the course of the month.
Throughout July, the most common forms of precipitation are drizzle.
Drizzle is the most severe precipitation observed during 100% of those days with precipitation. It is most likely around July 29, when it is observed during 1% 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 27% (dry) to 90% (very humid) over the course of a typical July, rarely dropping below 16% (dry) and reaching as high as 99% (very humid).
The air is driest around July 18, at which time the relative humidity drops below 34% (comfortable) three days out of four; it is most humid around July 31, rising above 86% (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 30°F (dry) to 50°F (very comfortable) and is rarely below 21°F (dry) or above 54°F (very comfortable).
Over the course of July typical wind speeds vary from 1 mph to 19 mph (light air to fresh breeze), rarely exceeding 25 mph (strong breeze).
The highest average wind speed of 9 mph (gentle breeze) occurs around July 12, at which time the average daily maximum wind speed is 19 mph (fresh breeze).
The lowest average wind speed of 7 mph (light breeze) occurs around July 30, at which time the average daily maximum wind speed is 14 mph (moderate breeze).