I remember they're usually out in late summer in my area since it's usually warm and a bit humid out. With the weather though if they hatch and we get a cold snap they could die the same day or week before breeding so this might be the end of them or at least in the areas of northern half of the US at least since the south would likely remain above 50 or 60F so they'd just sleep or hide in warm soil or even home areas like garages till it warmed enough to forage and mate then die off like normal.