Heat pumps can work well in Oklahoma's climate, which experiences both hot summers and mild winters. Heat pumps are efficient for cooling during hot weather and can provide adequate heating during milder winter temperatures. However, in extremely cold conditions, the efficiency of air-source heat pumps may decrease. Supplemental heating may be needed during the coldest days. Consult with HVAC professionals to determine the best type of heat pump and any additional heating solutions suitable for the specific climate in Oklahoma.