As someone who lives in Minnesota (and has lived in the upper Midwest for the last 14 years)... no, it's not just "proper clothing ...and a good attitude."

Below a certain temperature, it hurts to be outside for any nontrivial amount of time. That is a strong disincentive to go outside, no matter how many sweaters you're wearing.

That is pretty rare though. I live in Sweden (not the northern part) and at my previous job I liked to take walks at lunch and as long as it is not snowing, raining or being too windy it is pretty nice even at colder temperatures.

Now I'm usually talking about over -10C (14F) but a lot of people seem to think even that is too cold but just don't wear proper clothing.

I think that "certain temperature" varies for different people, or even over time for any particular person. When I was a child the cold killed me. A few weeks ago, the highs were in the mid-teens all week around here, and I found myself completely comfortable in jeans, a sweater, hat, gloves, and a coat while outside doing farm work. The big problem at those temperatures is working up a sweat when wearing clothes that don't immediately wick it away from the body. That gets very cold quickly.

I feel like he's thinking of 14 Celsius, not Fahrenheit

> As long as it isn't very windy, it's easy to make 14 comfortable.

No, no it is not.

And I say this as someone who enjoys the cold. No matter what, if it's 14 degrees outside, I'm only going out if I absolutely must. There's no hanging out in the parking lot during lunch in that kind of weather.

It's all relative. After a couple weeks of waking up to temperatures around or below 0F, the rise to the mid-teens felt like an early Spring.

I disagree. I'm from the midwest also. Grew up in Wisconsin/Iowa, and currently live in Iowa. I live where the wind hurts my face. Why do I live where the wind hurts my face?