Winter is the best time to ride! Where I live, it opens up tons of trails that you literally can't get to the rest of the year. I'm talking about all the frozen back water of the Mississippi River and all the islands. The cold weather definitely makes a difference for your jetting though and makes the motor more powerfull once you jet up. I've been riding in temps as low as -3F, but you can't go very long without coming in to warm up.
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'85 ATC250R
.030 Over Wiseco
FMF Pipe/Answer silencer
36PJ Keihin
K&N
Boyesen reeds
Magura hydraulic clutch
Roost Boost
MSR bars
OMF swingarm skid
ITP Beadlocks
Three Wheelin' Since '84