when is the coldest temperature before after or during snowfall?

Answer 1

Where I live it is usually coldest after the snow falls.

The snow reflects sunlight back into space so the ground doesn't get as warm, then once the snow clouds are gone and the sun goes down, there is nothing to keep the heat in. Brrr!

Answer 2

It could be any.

Snow is most likely at temperatures close to freezing point (much above and it falls as rain and much below and there's not enough moisture in the air for significant snowfalls).

The temperature before and after snowfall will be determined by the next air mass to move in and depending where that's coming from it could be warmer, colder or the same temp.

In recent days the weather here has been unseasonably warm, cold spell, warmed up a bit, snowed, got significantly colder and froze the snow, warmed and melted the snow, cooled off, snowed and now it's warmed up and the snow's melting.

The first fall of snow was sandwiched between warm then cold air, the most recent fall was between cold then warm air.

Answer 3

I am not a meteorologist but in the west there is a familiar saying "too cold to snow". In order to be very cold (say below zero) air cannot have much moisture content so it can't generate much if any snow.

Then I have been outside working and have noticed that just before a snow starts, the air becomes warmer.

We have our major storms when frigid cold air from Canada meets warm moist air coming up from the Gulf. So in this sense you could say it requires that air to be cooled in order for it to become unstable and snow. if you are on the south side of the front, you would notice that the air gets colder, then the snow comes, but where the front moves north, the opposite would be true which has been more my experience in Wyoming.

Answer 4

AFTER the snow falls