I don't have a kettle, so I use a cooking pot at home to boil water.  I boil water on high in the cooking pot and as soon as I see the big bubbles/steam forming, I assume the water has reached 100° C.  Is that correct?

If the water has reached 100° C and I let it settle off the stove for 1 min, what's the average temperature of the water after that period of time?

**EDIT**

I'm trying to make some coffee from my french press and from what I've read, people recommend to wait 1 min before pouring the hot water in the press.  I'm not getting a lot of coffee flavour from the french press after letting it infuse for 5 min.  I was curious to know if the temperature of the hot water can drop a lot in 1 min.