September weather forecast
King William's Town, South Africa

September

Weather in September

September, the first month of the spring in King William's Town, is a pleasant month, with an average temperature fluctuating between 9.2°C (48.6°F) and 21.6°C (70.9°F).

Temperature

King William's Town's weather in September displays an average high-temperature of an agreeable 21.6°C (70.9°F), showing minor disparity from August's 19.7°C (67.5°F). King William's Town documents a marked decrease from day to night, with an average low of 9.2°C (48.6°F) throughout September.

Humidity

In King William's Town, the average relative humidity in September is 63%.

Rainfall

In King William's Town, during September, the rain falls for 12.3 days and regularly aggregates up to 23mm (0.91") of precipitation. In King William's Town, during the entire year, the rain falls for 167.7 days and collects up to 520mm (20.47") of precipitation.

Snowfall

January through June, August through December are months without snowfall in King William's Town.

Daylight

In King William's Town, South Africa, the average length of the day in September is 11h and 54min.
On the first day of September, sunrise is at 06:27 and sunset at 17:53. On the last day of the month, sunrise is at 05:48 and sunset at 18:12 SAST.

Sunshine

The average sunshine in September in King William's Town is 7.7h.

UV index

The months with the lowest UV index in King William's Town, South Africa, are March through July, September and October, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.
Note: A maximum high UV index of 4 in September translates into the following recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.

Frequently asked questions

What is the average September temperature in King William's Town?
During September, King William's Town experiences an average high-temperature of 21.6°C (70.9°F) and a low-temperature of 9.2°C (48.6°F).
What is the average humidity in September in King William's Town?
The average relative humidity in September in King William's Town is 63%.
How much does it rain in King William's Town in September?
In King William's Town, South Africa, in September, it is raining for 12.3 days, with typically 23mm (0.91") of accumulated precipitation.
When it does not snow in King William's Town?
January through June, August through December are months without snowfall in King William's Town, South Africa.
How many hours of daylight does King William's Town have in September?
In September, the average day length in King William's Town is 11h and 54min.
When are sunrise and sunset in September in King William's Town?
On the first day of September in King William's Town, sunrise is at 06:27 and sunset at 17:53. On the last day of the month, sunrise is at 05:48 and sunset at 18:12 SAST.
How long on average sun shines in September in King William's Town?
In September, the average sunshine duration is 7.7h.
What are the months with the lowest UV index in King William's Town?
The months with the lowest UV index in King William's Town, South Africa, are March through July, September and October, with an average maximum UV index of 4.
What is the UV index reading in September in King William's Town?
In King William's Town, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in September - King William
Average temperature in September
King William's Town, South Africa
  • Average high temperature in September: 21.6°C

The warmest month (with the highest average high temperature) is January (25.3°C).
The month with the lowest average high temperature is July (17.9°C).

  • Average low temperature in September: 9.2°C

The month with the highest average low temperature is February (14.5°C).
The coldest month (with the lowest average low temperature) is July (7°C).

Average pressure in September - King William
Average pressure in September
King William's Town, South Africa
  • Average pressure in September: 1018.8mbar

The month with the highest atmospheric pressure is July (1023.1mbar).
The month with the lowest atmospheric pressure is January (1013.8mbar).

Average wind speed in September - King William
Average wind speed in September
King William's Town, South Africa
  • Average wind speed in September: 11.1km/h

The windiest month (with the highest average wind speed) is June (14km/h).
The calmest month (with the lowest average wind speed) is March (9.2km/h).

Average humidity in September - King William
Average humidity in September
King William's Town, South Africa
  • Average humidity in September: 63%

The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is June (55%).

Average rainfall in September - King William
Average rainfall in September
King William's Town, South Africa
  • Average rainfall in September: 23mm

The wettest month (with the highest rainfall) is February (82mm).
The driest month (with the least rainfall) is June (12mm).

Average rainfall days in September - King William
Average rainfall days in September
King William's Town, South Africa
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is January (20.7 days).
The month with the least rainy days is June (6.1 days).

Average snowfall in September - King William
Average snowfall in September
King William's Town, South Africa
  • Average snowfall in September: 0mm

The month with the highest snowfall is July (1mm).
The months with the least snowfall are January, February, March, April, May, June, August, September, October, November and December (0mm).

Average snowfall days in September - King William
Average snowfall days in September
King William's Town, South Africa
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are July and August (0.2 days).
The months with the least snowfall days are January, February, March, April, May, June, September, October, November and December (0 days).

Average daylight in September / Average sunshine in September - King William
Average daylight in September /
Average sunshine in September
King William's Town, South Africa
  • Average daylight in September: 11h and 5min

The month with the longest days is December (Average daylight: 14h and 18min).
The month with the shortest days is June (Average daylight: 10h and 0min).

  • Average sunshine in September: 7h and 4min

The month with the most sunshine is October (Average sunshine: 8h and 6min).
The month with the least sunshine is April (Average sunshine: 6h and 18min).

Average sunshine days in September - King William
Average sunshine days in September
King William's Town, South Africa
  • Average sunshine days in September: 14.8 days

The month with the most sunshine days is June (22.1 days).
The month with the least sunshine days is February (7.3 days).

Average UV index in September - King William
Average UV index in September
King William's Town, South Africa
  • Average UV index in September: 4

The months with the highest UV index are January, February, August, November and December (UV index 5).
The months with the lowest UV index are March, April, May, June, July, September and October (UV index 4).

Average cloud cover in September - King William
Average cloud cover in September
King William's Town, South Africa
  • Average cloud cover in September: 36

The month with the most cloud cover is December (Cloud cover 61).
The month with the least cloud cover is June (Cloud cover 20).

Average visibility in September - King William
Average visibility in September
King William's Town, South Africa
  • Average visibility in September: 9km

The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February, March, November and December (7km).

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