amounts of drizzle and less sunshine due to the activity of the southeast monsoon blowing moisture from the sea inland.

The region has a positive water balance (i.e. the precipitation exceeds the potential evapotranspiration). Hanoi averages 1612 mm 1 abbr= of rainfall per year, the majority falling from May to October. There are an average of 114 days with rain. The average annual temperature is 23.6 °C 0 abbr=on, with a mean relative humidity