Oil prices gained in Asian trade today, boosted by falling temperatures in the United States and continued weakness in the US dollar, dealers said.Comments by OPEC members that the cartel will push for another round of production cuts at its meeting next month also supported the market, they said.At 0845 IST New York's main contract, light sweet crude for January delivery, was up 13 cents at $61.12 a barrel from $60.99 in the United States yesterday, its highest level in three weeks