Ministry of Agriculture National Agricultural Fertilizer use Project (Phase 1): Final Report Annex III Description of the first priority sites in the various Districts Vol 4 Siaya

Abstract

The annual average rainfall of Siaya District increases from 800 mm at the lake shore to 2000 mm near the border of Kakamega District. The contrasts in 66% rainfall reliability, i.e. amounts surpassed in 20 out of 30 years, are even higher, in the first rains from 350 to 900 mm and in the second rains from 50 to 800 mm (see Maps 4.0.1 and 4.0.2). Near Lake Victoria the average annual temperature is about 22.5°C, in the nor~h-eastern part of the District it is 21°C . Humidity of the air is relatively high. For the entire District evaporation is 1800 - 2000 mm per year.