The average annual water vapor pressure value for Graaff-Reinet Eastern Cape over the past 30 years is 13.25 kPa (kilopascals).
In city of Graaff-Reinet Eastern Cape, the water vapor pressure in January is 1.53 kPa; The water vapor pressure in February is 1.62 kPa; The water vapor pressure in March is 1.48 kPa; The water vapor pressure in April is 1.18 kPa; The water vapor pressure in May is 0.89 kPa; The water vapor pressure in June is 0.71 kPa; The water vapor pressure in July is 0.66 kPa; The water vapor pressure in August is 0.71 kPa; The water vapor pressure in September is 0.85 kPa; The water vapor pressure in October is 1.04 kPa; The water vapor pressure in November is 1.21 kPa; The water vapor pressure in December is 1.37 kPa.
The vapour pressure of water is the pressure exerted by molecules of water vapor in gaseous form (whether pure or in a mixture with other gases such as air). The saturation vapour pressure is the pressure at which water vapour is in thermodynamic equilibrium with its condensed state.
Address: Graaff-Reinet, Eastern Cape, South Africa.