Swellendam monthly weather averages

Contents

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Swellendam

Swellendam average temperature chart (Celsius) Swellendam average temperature chart (Fahrenheit)
Average monthly temperatures in Swellendam (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 28.7 28.4 26.9 24.4 21.2 19 18.3 18.8 20.6 23 25.4 27.5
°F 83.7 83.1 80.4 75.8 70.1 66.2 64.9 65.8 69 73.4 77.7 81.5

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Swellendam monthly rainfall chart (mm) Swellendam monthly rainfall chart (inches)
Average monthly rainfall in Swellendam (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 47 52 52 67 54 47 51 68 44 61 48 34
inches 1.8 2.1 2 2.6 2.1 1.8 2 2.7 1.7 2.4 1.9 1.3
Rainy days 5 6 7 8 8 9 8 10 8 8 7 5

Average annual rainfall in Swellendam: 610.134mm (240.2 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Swellendam

Swellendam average daily sunshine chart
Average daily sunshine Swellendam
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 10.3 9.3 8.3 7.3 6.6 6.4 6.9 7.2 7.7 8.4 9.3 10.2

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Swellendam average minimum / maximum temperatures (Celsius) Swellendam average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Swellendam (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 16.2 16.6 15.2 12.4 9.2 6.9 6 6.7 8.6 10.9 13.3 15
Max °C 29.1 28.7 27.2 24.7 21.5 19.3 18.6 19.1 20.9 23.3 25.7 27.8
Min °F 61.1 61.8 59.4 54.2 48.5 44.4 42.8 44.1 47.4 51.6 55.9 59
Max °F 72.7 72.7 70.2 65.3 59.5 55.6 54.1 55.2 58.5 62.8 67.1 70.5

Sea temperature

The graph below shows the average sea temperature.

Swellendam average sea temperature chart (Celsius) Swellendam average sea temperature chart (Fahrenheit)
Average sea temperature around Swellendam in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 20.7 20.8 19.8 18.2 17.1 16.3 15.8 15.7 16 16.7 18 19.6
°F 69.3 69.4 67.7 64.7 62.8 61.4 60.4 60.3 60.8 62 64.4 67.3

Wind speed

The graph below shows the average wind speed.

Swellendam average winspeed by month (km/h) Swellendam average winspeed by month (mph)
Average wind speed in Swellendam (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 16 16 14 12 12 12 13 14 15 16 17 17
mph 10 10 9 8 7 7 8 9 9 10 11 11

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Swellendam relative humidity averages
Average relative humidity in Swellendam
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
64% 67% 69% 71% 72% 72% 73% 73% 72% 68% 66% 64%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Swellendam weather stats

Swellendam weather statistics
Hottest month: January 28.7°C 83.7°F
Driest month: December 34mm 1.3ins
Sunniest month: January 10.3hrs
Coldest month: July 18.3°C 64.9°F
Wettest month: August 68mm 2.7ins
Warmest sea: February 20.8°C 69.4°F
Map showing location of Swellendam (-34.02262, 20.44171) Swellendam map pin © Google

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