Fortunately most places don't require you passing step 2.
Otherwise keep checking?
I did some research for you:
http://www.emresidency.ucsf.edu/applicants/applicant-information
UCSF wants your scores by Feb 15.
http://www.usmle.org/examinations/step2/step2cs_reporting.html
"Over the past 4 years, results for 98%-99% of examinees who take the exam during the testing period were reported by the third Wednesday in a Reporting Period."
If you take the exam in December, looks like Feb 15th is the third Wednesday of your reporting period. Cuttin it mighty close!