They say the monkeys are more afraid of young men than women and children, and the bolder ones throw stones and chase the women from their farms.
Nachu's women have tried wearing their husbands' clothes in an attempt to trick the monkeys into thinking they are men - but this has failed, they say.
"When we come to chase the monkeys away, we are dressed in trousers and hats, so that we look like men," resident Lucy Njeri told the BBC News website
"But the monkeys can tell the difference and they don't run away from us and point at our breasts. They just ignore us and continue to steal the crops."
In addition to stealing their crops, the monkeys also make sexually explicit gestures at the women, they claim.
"The monkeys grab their breasts, and gesture at us while pointing at their private parts. We are afraid that they will sexually harass us," said Mrs Njeri.
The Kenyan Wildlife Service told the BBC that it was not unusual for monkeys to harass women and be less afraid of them than men, but they had not heard of monkeys in Kenya making sexually explicit gestures as a form of communication to humans.
The predominantly farming community is now having to receive famine relief food.
Monkey misery for Kenyan women villagers
