This is an almost impossible task, even for a $500-600 jacket.

If temperatures are exceeding 20C in the rain and windy conditions I would go with a single layer Ventile jacket such as the Cairngorm Ventile Jacket together with an Umbrella.

http://www.west-winds.co.uk/cairngorm.htm
http://www.west-winds.co.uk/safrishirt.htm

Both are avialable at lower cost here at;

http://www.sofmilitary.co.uk/military/index.asp

Double layer Ventile will keep you waterproof but It might just be to warm in a warm humid conditions. I suppose you could also use the Ventile Shirt with the single layer Ventile jacket.



The idea behind Ventile is that when it gets wet the long stable cotton fibres in the very fine weave expand and seal up making the material virtually waterproof. The Umbrella can be deployed during lighter winds and the heaviest of the downpours. The single layer Ventile when wet will have a slightly damp feeling but will be reasonably cool instead of that hot wet stinky feeling inside a crinkly plastic crisp packet.