Seasonal precipitation patterns show no consistent patterns in variation. The intensity of precipitation is measured by the number of days with more than 10 mm precipitation. On this basis, the northern part of the coastal zone has more rainy days than elsewhere - 49 days per year with precipitation of more than 10 mm. Between 1951 and 1978, precipitation of more than 77 mm was observed at least once per year during 75 per cent of the period.