First, no moonlight! That's right, the moon isn't going to come up until 4:06 a.m. and it's in the waning crescent stage. So no extra light to wash away meteors.
Second, the Geminids coincides with its parent asteroid, which will only add to the number of meteors that we might see. So it is possible, if you get to a dark, rural area that you might see over 100 per hour. That's a good show.
Most meteor showers peak in the early morning hours (and this one will too), but what is so special about this one is that after 9 p.m., you could start to see quite a few about 30° above the eastern horizon.
Forecast for Wed. Night: Mostly clear (there will be some high clouds passing through, but I still think the brighter meteors will shine through just fine) - temperatures will be down in the 30s/low 40s early evening, but if you wait until early Thursday morning, you can expect temperatures down in the 20s for most areas.