NEBE had previously tentatively proposed the voting day to be Aug.10.
The announcement was made by Birukan Midkesa, Chairperson of NEBE during a discussion with various political parties, and civil society organizations.
Mideksa said the National Electoral Board of Ethiopia will work with the Ethiopia National Metrology Agency to mitigate the effects of the rainy season on the logistics holding the vote.
Ethiopia experiences annual rainy season from early June up to early September.
The last parliamentary and regional assemblies' elections were held in May 2015.