I've had discussions about this with a local Congregationalist pastor. I told her I otherwise liked her church, but I would miss weekly communion, and I am in need of a new church home. She said in their tradition, monthly communion is the norm, and she's never heard of a UCC or Congregationalist church that practices weekly communion.
However, it seems strange to me that it isn't weekly, especially as they have changed so much of their other practices from the historical norms (the Revised Common Lectionary, commemoration of days such as Ash Wednesday, etc.). I have been doing research on contemporary philosophy, and I find it strange that people think sentimental hymns, preaching, and prayers are adequate expressions of Christianity, when three Gospels and Paul all have explicit narratives of the Lord's Supper, and Acts references "the breaking of bread" as something that happened often in the early Christian community. The whole point of the Incarnation is that salvation occurs within bodies, it was the heretics that denied that Jesus was a fleshly being that abstained from the sacraments in the early Church.
All I've heard traditionally are responses like "It wouldn't be special anymore" or "it is too much trouble". All answers that seem to me to be impious and regard the sacrament as more of a formality. I know even John Calvin argued for weekly communion, but the Genevan elders overruled him.