My experience with an engine oil temp gauge is that it takes a while for the oil to come up to temp.

You can see the temp rise - or lack thereof - if you have a mechanical oil pressure gauge.
Takes a while for it to settle in at running pressure.

180 degrees F is an excellent engine temp winter or summer.

Don't sweat the oil temp.
You probably won't see it come off the bottom during the colder months of winter unless you're making a long trip.

I have a trans temp gauge and it takes quite a while for it to come off the bottom in winter.

What can help bring the oil temp in engine or trans up is to run a bunch of short errands.
The engines water temp comes up to 180, you park the car, the engine oil and trans case/oil does the heat soak bit with heat from the engine and it's not long until oil temps are up to where they will probably be during a long trip.

Stick with the 10-30 engine oil.
I talked to a nationally known magazine tech writer who really knows his stuff a while back, the subject was multi-viscosity oils for my new F-150 SuperCrew.
He didn't come right out and say it, but if you read between the lines the allusion was easy to see . . . use 10-30 instead of 5-20 or 5-30.

What a lot of folks don't know about 5 wt and lighter engine oils - there is a 0 weight out there - is that they were designed to improve the CAFE auto manufacturers go by.
(CAFE being Corporate Average Fuel Economy.)

Buick burned up a bunch of engines when they were ran on 5 wt a few years back.