You say "weather forecast" in French as "prévisions météorologiques".
"La météo" in French means "the weather" in English. It is used to refer to the current or forecasted weather conditions.
"This is the weather report" might be translated simply "C'est la météo". You could say that if, for example, you're watching the weather forecast on television and then someone comes in and is confused about what's on. The weather presenter on TV might say something more fomal like "Il s'agit de votre bulletin métérologique quotidien."
The phrase meteo monde is French. Meteo monde is french for the phrase weather world. They consider meteo monde their weather forecast such as one would see on the nightly news.
The weather forecast is "les prévisions météo -or- le bulletin météo -or- le bulletin de prévisions météorologiques" in French.
Prévision
"Meteo 12 jours" is a french phrase that translates to 12 day weather forecast. Is is a common phrase that would be encountered in most French language newspapers and news programs.
"Meteo Montagnes" is based out of the country France. Meteo Montagnes means "mountain weather" in French, and a general search of it will yield the weather in mountainous areas in France.
les prévisions météo pour cette semaine sont(plural)
The weather in France is cloudy, foggy, rainy, windy, cold.
If you've been watching the Olympics, you may have noticed that the announcements are always made in French first. That's because the modern Olympic Games are a French invention. So France has been in from the very start in 1896.
In French, you say "France" as "France."