Average Weather In March For Cape Town, South Africa

Location

This report describes the typical weather at the Cape Town International Airport (Cape Town, South Africa) weather station over the course of an average March. It is based on the historical records from 1994 to 2012. Earlier records are either unavailable or unreliable.

Cape Town has a mediterranean climate with dry warm summers and mild winters. The area within 25 mi of this station is covered by oceans and seas (40%), grasslands (33%), croplands (17%), built-up areas (6%), and forests (5%).

Temperature

The month of March is characterized by gradually falling daily high temperatures, with daily highs around 78°F throughout the month, exceeding 87°F or dropping below 70°F only one day in ten.

Daily High and Low Temperature in March

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 range from 58°F to 61°F, falling below 52°F or exceeding 66°F only one day in ten.

Fraction of Time Spent in Various Temperature Bands in March

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 March, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 1:04 hours, implying an average day-over-day decrease of 2.1 minutes.

The shortest day of the month is March 31 with 11:44 hours of daylight; the longest day is March 1 with 12:48 hours of daylight.

Daily Hours of Daylight and Twilight in March

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 6:34am on March 1; the latest sunset is at 7:22pm on March 1; the latest sunrise is at 6:57am on March 31; the earliest sunset is at 6:41pm on March 31.

Daylight savings time (DST) is not observed in 2012.

Daily Sunrise & Sunset with Twilight in March

The solar day over the course of the year 2012 . 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.

Clouds

The median cloud cover is 28% (mostly clear) and does not vary substantially over the course of the month.

Median Cloud Cover in March

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 March 16, a representative day, the sky is clear or mostly clear 58% of the time, partly cloudy 8% of the time, and mostly cloudy or overcast 17% of the time.

Cloud Cover Types in March

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 probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around March 31, occurring in 22% of days. Precipitation is least likely around March 3, occurring in 16% of days.

Probability of Precipitation at Some Point in the Day in March

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 March, the most common forms of precipitation are moderate rain, light rain, and drizzle.

Moderate rain is the most severe precipitation observed during 40% of those days with precipitation. It is most likely around March 28, when it is observed during 9% of all days.

Light rain is the most severe precipitation observed during 39% of those days with precipitation. It is most likely around March 31, when it is observed during 9% of all days.

Drizzle is the most severe precipitation observed during 12% of those days with precipitation. It is most likely around March 4, when it is observed during 3% of all days.

Types of Precipitation Throughout March

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

Snow

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

Humidity

The relative humidity typically ranges from 46% (comfortable) to 94% (very humid) over the course of a typical March, rarely dropping below 31% (comfortable) and reaching as high as 100% (very humid).

The air is driest around March 5, at which time the relative humidity drops below 53% (mildly humid) three days out of four; it is most humid around March 31, rising above 91% (very humid) three days out of four.

Relative Humidity in March

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 March, the dew point typically varies from 51°F (very comfortable) to 62°F (mildy humid) and is rarely below 45°F (dry) or above 66°F (muggy).

The time of the month between March 1 and March 31 is the most comfortable, with dew points that are neither too dry nor too muggy.

Dew Point in March

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 March typical wind speeds vary from 2 mph to 21 mph (light air to fresh breeze), rarely exceeding 28 mph (strong breeze).

The highest average wind speed of 13 mph (moderate breeze) occurs around March 3, at which time the average daily maximum wind speed is 21 mph (fresh breeze).

The lowest average wind speed of 11 mph (gentle breeze) occurs around March 31, at which time the average daily maximum wind speed is 19 mph (fresh breeze).

Wind Speed in March

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 south (32% of the time), north west (14% of the time), north (13% of the time), and south west (12% of the time). The wind is least often out of the east (2% of the time), north east (5% of the time), and west (5% of the time).

Wind Directions in March

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 March

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.