As we enter December, weather is always lurking in the background as a potential factor in fantasy start 'em, sit 'em decisions. Fortunately, the Week 13 NFL weather forecast is fairly mild, at least by December standards, as rain, wind, and cold figures to only affect a handful of games. Nonetheless, RotoGrinders' meteorologist Kevin Roth is once again here to help us break down the weather updates you need to know before locking in your lineup. Before we get into the Week 13 forecasts, here's a reminder that if you have any questions about sports weather or how weather could impact play (and, potentially, your fantasy, DFS, and gambling decisions), don't hesitate to reach out to RotoGrinders' meteorologist Kevin Roth on Twitter (@KevinRothWx) or check out the hourly NFL weather forecasts on RotoGrinders.

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