Hi dsteltz,
In general terms latex is the most breathable and most temperature neutral of all the foam materials and even for those that are closer to the oven end of the “oven to iceberg” range it would be uncommon that most people would have temperature regulation issues sleeping on latex … especially if the mattress has a quilted cover that uses a material that has good airflow in the quilting.
Having said that … there are other reasons besides just the type of foam in the mattress that can reduce airflow and/or cause temperature regulation issues for some people including (as vici0usx mentioned) the type of mattress protector you are using along with the type of sheets and bedding (and of course the bedroom temperature and humidity as well and other “non mattress” factors including the person themselves and their routine before they go to bed either on most days or on a particular day).
There is more about the variables that can affect sleeping temperature in post #2 here that can help you track down the most likely reasons for any temperature regulations you are experiencing.
Phoenix