I cracked the 6000 mile mark for 2015 finishing the year with 681 miles in December. Maybe in 2016 I won’t leave myself with one of my bigger months at the end.
I was in a similar position, end of November and over 600 miles still to do which is difficult in a usual December. Fortunately the weather was okay, no icy days, so did over 600 in December taking my annual total to 6027, 7 more than 2014, and cracking the 6000 on 31st December (I did want to ride that day anyway). But I was off the bike the whole of October 2015 recovering from knee surgery so I was delighted to get over the 6k.
Not sure I’ll bother setting any targets this year but I’ll see how it goes. Although I would like to get a 1000 mile month in this year, tried last year but only got to 933.