Compost at room temperature?

yes, but you can wet it with hot water - that usually does the trick 

Really? To both answers.
How water I sort of get ....... But microwave? I guess it will warm it up. I can see the face of OH and daughters if I leave some in there by mistake. They already moan about having to share a bathroom windowsill with to transplanted seedlings!! 

10 seconds?

I can picture it now, a compost explosion inside the microwave!

The next picture would be of the wife with the rolling pin raised above her head!  

My compost is also in the garage, and prior to sowing onion and leek seeds at the weekend, I`ll just bring the opened bag into the house and leave it near a radiator for a day.

I'm not suggesting you get it toasty warm, it obviously won't stay at that temperature, but the technique can be used to bring a small quantity quickly up to ambient temperature if you've forgotten to bring some in the day before.

Microwaves only agitate water molecules so unless you end up steaming your compost in the micro, it won't sterilise it.  I'd be wary of the compost ingredients if you're intending on using the microwave as some brands have little balls of slow release fertilizer in them which are likely to explode in a micro and may realease large quantities of concentrated fertilizer into the compost.

I'm not sure if you need to warm it first.  It would make germination quicker if the soil is already warm but if your not in a rush the soil will warm up to room temp anyway then the germination will start.

And mine is now in the kitchen, to be moved to the hallway overnight (stays warmer in the hall overnight).
Thanks all.