obtaining the most current weather information is crucial for you flight safety, numerous accident a year are related to pilots disregarding weather reports, it’s your responsibility as pilot in command to familiarize yourself with all weather data concerning your flight.
the tools i will describe are present at the usa you should consult the weather tools at your country.
Where do we start? some general picture can be obtained from watching the weather channel their reports are quite accurate although not directed specifically to the aviation community you can get the general picture if your flight is supposed to be vfr or ifr.that of course is not enough ,various internet site give excellent weather reports like www.aopa.org www.duat.com and www.duats.com some will require you to register and are restricted to pilot certificate holders only.
did you know that googling your destination identifier with the word metar or weather attached would get you a current metar report for your request try it - google --kjfk metar-- and you will get results with the current metar at kennedy airport.
The most legitimate and professional way to obtain your weather briefing is from a specialist briefer at 1800wxbrief
Be aware the amount of data you can get is overwhelming, make sure you note where is the VFR holes you can divert to if things get nasty.
at the end you as pic have the final say regarding your flight don’t be timid to change planes, better pilots then you have done that, we treat mother nature with the respect she deserves.she rewards us with the freedom to fly