I cruise the Mexican Riviera all year long. And yes... during
the winter months the temps above Cabo up to Southern California
can be on the chilly side.

One thing about it though... when headed South... about an hour
before you get near Cabo you cross an imaginary geographical line
called the Tropic of Cancer.

Meaning you have entered the Tropics... and the climate and the
environment is going to be a whole different ball game... and a
setting that you will probably enjoy regardless of the time of
year you are there.

Old timers tell me that April is the optimum month to be in that
region...

Oh yeh... the hurricane season is June through October... and yes
I have had more than one cruise screwed up because of the storms.

Hope this little knee jerk tutorial helps...

Best regards

Bill