Country Overview For South Africa
The climate in South Africa is typically mostly semiarid; subtropical along east coast; sunny days, cool nights. The terrain: vast interior plateau rimmed by rugged hills and narrow coastal plain. For Pretoria in January the daily average maximum temperatures is 29°C with the average minimum 15°C, while in June the average maximum is 20°C with a minimum of 1°C. The wettest month for Pretoria is December with an average of 112.1mm of precipitation falling while the driest month is July with 1.5mm falling.
HISTORICAL MONTHLY AVERAGES FOR MAY
The information presented below gives detailed historical monthly average weather conditions along with exceptional weather occurrences. To maintain relevance to current weather trends the displayed information has been calculated using data collected over the past two decades. The climate profile is taken from closest available data source to Greytown.
Temperature
Throughout the month of May daytime temperatures will generally reach highs of around 23°C that's about 74°F. At night the average minimum temperature drops down to around 7°C, that's 44°F.
In recent times the highest recorded temperature in May has been 30°C that's 87°F, with the lowest recorded temperature -4°C, about 26°F.
Relative Humidity
The average daily relative humidity for May is around 68%.
Heat Index
The Heat Index is a measure of how hot it feels when relative humidity is added to actual air temperature. From this a comfort level is calculated providing categories on how heat conditions might adversely affect someone.
Comfort Levels: Given average maximum temperatures and humidity levels generally you should not anticipate any discomfort from heat (see heat index for more information).
Precipitation
The average monthly amount of precipitation has been recorded at around 14 mm, that's 1 inches.
Wind
The average daily wind speed in May has been around 5 km/h, that’s the equivalent to about 3 mph, or 3 knots. In recent years the maximum sustained wind speed has reached 39 km/h, that’s the equivalent of around 24 mph, or 21 knots.
YEARLY TRENDS: WEATHER AVERAGES & EXTREMES
The following charts show yearly weather trends with information on monthly weather averages and extremes.
Temperature
The chart below plots the average high and low temperature for each month of the year. It also shows the maximum and minimum recorded temperatures.
Precipitation Amount
The chart below plots the average monthly precipitation amount.
Wind Speed
The chart below plots the average daily wind speed you can expect for any month. It also shows the maximum recorded sustained wind speed for each month.