I would guess North?

Actually, cold air usually moves in from the northwest. But the coldest nights occur on a perfectly clear night after a cold front has moved in. With no clouds and no wind, the cold air settles right down to the ground.

Carol in Jacksonville

Hi
Suppose it varies in different parts of florida but in the zone 10 parts it's always from the NW The severity and duration is dictated by the jet stream . The further south it moves, the colder lol ususally lasts 3 days with the lowest temps on the second day. The fronts always originate from the Pacific NW. the lowest temps are when it's calm ,naturally because florida is surrouned by th warm gulf stream so the closer to the ocean the warmer it stays .
Something I've always wondered about is the temp drop just before dawn always the lowest temp of the day Sunmmer and winter Anybody know why?? gary

I concur with Garyfla. REAL cold fronts usually swoop in from the NW, coming down from Canada and rolling south/east.

Garyfla, I believe the temp drop just before pre-dawn is simply due to it being the furthest point in time from sundown. By dawn all the stored heat in soil, stone, pavement, etc. has dissipated from the night's cooler temperatures and there's just nothing left to radiate.

Here it is straight from the North!!

Here in the center of the state it comes from both the North and Northwest.

I'm relatively new too but here in Vero it seems to (me) to be N-NW. When the cold air moves straight down the state, over land instead of water.

If you're in... say Naples, it may be more directly out of the North.

I haven't been here long enough to know for sure though.

When we had that really bad freeze a couple of years ago, it was all the coconut palms and other trees on the north and west side of the homes in our neighborhood that died.
You could literally drive down the street and everything was dead on one side and struggling on the other.