I get this question all the time. Parents are very surprised when they hear that the ideal temperature for a baby’s room is only 16 – 20 degrees. A lot cooler than expected. I lean more towards 20 degrees, but the books say 18. Try to keep the baby’s room temperature constant and then dress the baby accordingly. My boy and girl is in the same room, but she always feels warm (even in winter time) but my boy is always cold. So I dress her in light pajamas and him in nice warm fluffy pajamas. Once your baby is asleep, go back in and feel her body temperature. You’ll know if she is too cold or too warm. Don’t worry about cold hands and feet, it’s normal for a baby. According to the SIDS website, thermal stress (overheating) has been implicated in Sudden Infant Death Syndrome (SIDS) BUT there is NO evidence to show that maintaining a specific room temperature PREVENTS SIDS. Babies regulate their body temperature through their heads, particularly the face. When the face is covered with blankets, pillows or duvets, thermal stress can occur. I’m very pro NO blankets or sheets in the cot. Dress your baby in a 3.5/2.5/1.0 Sleeping bag. I really think it’s a lot safer!