I was prepared for hot, humid, sunny weather when I arrive in Buenos Aires in two weeks. I wasnt going to bring anything warmer then a light sweater. It doesnt seem like it is that warm??? And in the sixties at night? Mendoza even has a low of 60 listed....

As it is 19 degrees here in Seattle now, I dont remember what the 60s feels like - but I'm thinking I might need a little more than a sun dress and a sweater - at least at night? As a quantifier, I get cold pretty easily.....

The weather prevailing at this time in BA is unseasonal. That said, as the weather lately is notoriously fickle, you MAY "need a little more than a sun dress and a sweater". Obviously, there's no way to know for sure. Ideally, you should be able to "layer".

Have a great time in our town.

Bring one cotton jacket or a couple of sweaters for chilly days/nights but my guess is that in 2 weeks it will be hot and sunny again.
I am not really hating this weather because it seems like once it gets hot, there is no break until fall so I am sort of enjoying this while I can.

Today is one of those days where the sky is this incredible blue and the air sort of sparkles, dry and clear.

Thank you!
Talk about unseasonal weather - Seattle is supposed to get down to 9 tonight - brrrr.

9 in Seattle -- unreal! We arrived in BA last year in Nov and it was cool, even chilly at night. We left BA and went to the NW, came back 9 days later to weather that was HOT, HOT, HOT.
Have a great trip - I remember your earlier planning.

Yes, have a great time, and remember, if you need a warmer jacket, you may always go shopping!

shopping will not be a problem - I just want to be warm! It's 26 in Seattle and I dont like it one bit!

Today was warm. Mucho calor !
Birds are singing loudly, flowers are blooming, grass is getting cut often and mosquitoes are out ... I think you will be happy ...