Thermochemical data of methanol
NIST Webbook Chemistry is a reference which I would recommend as a first (as in initial) resource to consult for enthalpies of small organic molecular and inorganic materials.  The entry about methanol lists for one temperature the value in question, the experimental method of acquisition, and the primary literature reference.  The later may contain more data than the one tabulated here, too.

The references might be old, but in a scientific library you will find assistance to figure out who cited these publications which in turn may lead you to more recent determinations.