Confused by rainfall forecasts? The Kenya Meteorological Service Authority explains how to interpret terms like 'millimetres' and 'above average' rainfall.

• One millimetre (mm) of rainfall equals one litre of water over one square metre, but its impact varies significantly based on local climatology, such as in Nairobi versus Kakamega.
• 'Normal' rainfall is between 75% and 125% of the historical Long-Term Mean (LTM) over a 30-year period.
• 'Above-normal' rainfall means more than 125% of the historical average, not necessarily continuous rain, while 'below-normal' signifies less rain than usual, not a complete absence of rain.