Il fait trés pleuvieux pleut beaucoup! 

Explanations:

1) OK so I'm not a native speaker, and pleuvieux appears to be a word, but I've spent a lot of time in France, including living there for three years, during which I've never heard it...I'd just say that it sounds more natural in French to say 'it rains a lot', and not 'it's a very rainy day'. Some things don't translate well when translated directly.

2) En is for countries (provided the countries are feminine!) but à is for cities - always :)

3) Spelling asseoir is a b*tch xD I hardly ever know how to do it either. But another note...I didn't correct it because I wasn't sure, but I think you're only supposed to say asseoir - not m'asseoir. M'asseoir means...I take a seat. But you don't take a seat all day (unless you sit down, then get up again, then sit down again for the entire day). You sit all day, and hence it'd only be asseoir - I think. 

4) Journée is feminine, hence toute. Remember to make all plurals/genders the same, also when it comes to de(s)/nourriture/chinoise :)

5) Cuire / cuisiner, hmm...can't really explain. I have never heard cuire used like that even though it technically means 'cook'. But usually you'd say that food is 'bien cuit' for example, meaning well cooked, as opposed to raw - but if you're saying you are cooking then you'd use cuisiner.

Good luck learning!

Il fait trés pleuvieux!

Aujourd’hui  ,le temps est pluvieux !

Bonjour Dennis , 

je suis Française  , et je me suis permise de  corriger ton texte  ,j’espère que cela t'aidera dans ton apprentissage !

Bonne chance ,

Cathy

Il pleut !

Ce soir, après le travail, je vais préparer de la nourriture chinoise et utiliser mon ordinateur. Apres le dîner, je vais aller au bar avec mes amis pour un quiz et boire des bières!