I started out with a pair of BH SOLAG. A problem I had with the dexterity was the inner seam of each finger had 3/4" of extra material in the tip of the finger. Plus the wrist strap was restrictive and to short IMO.
I switched to the Hatch Operators for CQB operations. Alot better dexterity!
As far as cool weather & dexterity goes, I have been using Ringer Gloves. They make several different styles and started out in the auto racing industry. www.ringergloves.com
They are very customer oriented as well.
I am fairly sure you can request the glove without the white logo on the back, I just filled mine in with a marker.
I have started several IV lines with these and had no difficulty with the dexterity!