Average Weather In July For Walvis Bay, Namibia

Location

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%).

Temperature

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.

Daily High and Low Temperature in July

The daily average low (blue) and high (red) temperature with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).
Daily low temperatures are around 51°F, falling below 44°F or exceeding 59°F only one day in ten.

Fraction of Time Spent in Various Temperature Bands in July

The average fraction of time spent in various temperature bands: frigid (below 15°F), freezing (15°F to 32°F), cold (32°F to 50°F), cool (50°F to 65°F), comfortable (65°F to 75°F), warm (75°F to 85°F), hot (85°F to 100°F) and sweltering (above 100°F).

Sun

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.

Daily Hours of Daylight and Twilight in July

The number of hours during which the Sun is visible (black line), with various degrees of daylight, twilight, and night, indicated by the color bands. From bottom (most yellow) to top (most gray): full daylight, solar twilight (Sun is visible but less than 6° from the horizon), civil twilight (Sun is not visible but is less than 6° below the horizon), nautical twilight (Sun is between 6° and 12° below the horizon), astronomical twilight (Sun is between 12° and 18° below the horizon), and full night.

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.

Daily Sunrise & Sunset with Twilight and Daylight Saving Time in July

The solar day over the course of the year 2013 . From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (solar, civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the "DST" labels.

Clouds

The median cloud cover is 100% (overcast) and does not vary substantially over the course of the month.

Median Cloud Cover in July

The median daily cloud cover (black line) with percentile bands (inner band from 40th to 60th percentile, outer band from 25th to 75th percentile).

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.

Cloud Cover Types in July

The fraction of time spent in each of the five sky cover categories. From top (most blue) to bottom (most gray), the categories are clear, mostly clear, partly cloudy, mostly cloudy, and overcast. Pink indicates missing data. Outside of the United States clear skies are often reported ambiguously, leading them to be lumped in with the missing data.

Precipitation

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.

Probability of Precipitation at Some Point in the Day in July

The fraction of days in which various types of precipitation are observed. If more than one type of precipitation is reported in a given day, the more severe precipitation is counted. For example, if light rain is observed in the same day as a thunderstorm, that day counts towards the thunderstorm totals. The order of severity is from the top down in this graph, with the most severe at the bottom.

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.

Types of Precipitation Throughout July

Relative frequency of various types of precipitation over the course of a typical July.

Snow

Either snow is exceptionally unlikely to fall at this location in July or this station does not reliably report precipitation types.

Humidity

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.

Relative Humidity in July

The average daily high (blue) and low (brown) relative humidity with percentile bands (inner bands from 25th to 75th percentile, outer bands from 10th to 90th percentile).

Dew Point

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).

Dew Point in July

The daily average low (blue) and high (red) dew point with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

Wind

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).

Wind Speed in July

The average daily minimum (red), maximum (green), and average (black) wind speed with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).
The wind is most often out of the west (16% of the time), south west (13% of the time), and north (10% of the time). The wind is least often out of the south east (4% of the time).

Wind Directions in July

The fraction of time spent with the wind blowing from the various directions over the entire year. Values do not sum to 100% because the wind direction is undefined when the wind speed is zero.

Fraction of Time Spent with Various Wind Directions in July

The fraction of time spent with the wind blowing from the various directions on a daily basis. Stacked values do not always sum to 100% because the wind direction is undefined when the wind speed is zero.