Pouring concrete with overnight frost?

[flanagaj]

This week is looking nice and dry with daytime temperatures in the region of 14c-18c, but with low temperatures overnight.  If the concrete is poured in the morning and I cover the trenches with a concrete frost protection blanket, will that suffice and ensure that the concrete doesn't suffer irreparable damage. 

[markc]

In trenches you won’t have any problems (unless you are pouring into permafrost) as the ground will be several degrees above freezing.

[SteamyTea]

From my limited understanding of the chemistry involved, once the water is added, the reactions start.

So if warm(ish) when poured in the morning, a frost should not bother it.

 

[Russell griffiths]

For footings, pour it in get it level go to pub, that is it. 
do not cover, waste of money. 
slab, that’s a different matter, finished floor that’s a very different matter. 
 

[Oz07]

Yeh trenches be fine. I'd like to think now we are past the stage of hard ground frosts. I'd like to think we're past the window scraper stage tbh