ok, heres my account on experience of manila when i went there this christmas:
raining season = basically the months of summer here in the states
my cousins told me during raining season it basically rains every day. But i have never experienced it (i only go during the winter time).
my ancestry is filipino, but i am born and raised in NYC. When i went there it was obvious i was american. the most important thing is: PAY CLOSE ATTENTION TO YOUR MONEY in your pocket. Since it was obvious i wasnt filipino, i was a prime target for pick-pocketers. While i was there, i got pick-pocketed twice.
the city: omg, the city is soooooooo polluted its not even funny. Its impossible to walk around because there is so much smog in the air. To breathe, you have to have a hankerchief(sp?) covering your nose/mouth. Also, it is very very crowed in the streets. ANd dont even think of driving there. Drivers there are crazy (and im from NYC, heh). Also, the traffic there is UNBEARABLE. To get anywhere in the city takes 2 hours, thats how bad it is. Just take a jeepney or tricycle if you want transportation
money: EVERYTHING there is dirt cheap. When my cousins and i went out to eat, a 3 course meal for 10 people cost less than $30 (maybe even less, i dont remember exactly how much). Also, manila is the cheapest city to get drunk, heh.
i dont know why u want to go to the manila, honestly, i think its one of most ugliest/polluted cities i have ever seen. the only reason i go there is because most of my family lives there. If i was you, i would only spend a couple days in manila and go straight to bagiuo (pm me if u want info on that city)
pm me if you have any additional questions