Before any flight the pilot in command is required to obtain and interpret actual and forecast weather. These are available in TAF (forecast) and METAR (actual) reports.
Reading these reports isn't very difficult. It takes some time to be able to read these encrypted abbreviations but you will get used to it very quickly. The manual below will help you with that learning process.
For our US visitors we have included the full advisory circular of the Federal Aviation Administration (FAA).
Excerpt from the document:
This AC explains U.S. aviation weather products and services. It provides details when necessary for interpretation and to aid usage. This publication supplements its companion manual, AC 00-6, Aviation Weather.
To continue reading see the pdf below: