That’s 45°C. The summers are often unbearable due to the heat, and unless you have money, you will be without electricity for much of the day (meaning no air-conditioner), due to the national deficits in the energy sector. The winter is not extreme, it is still pretty warm in the winter and you can walk around in a t-shirt during the day, but at night temperatures often drop to the single digits. It doesn’t snow in Lahore.
If you were born and raised in the West, most likely you will not like living in Lahore. 80% of the Pakistanis that I’ve known who were born & raised in the West do not enjoy the life in Pakistan, regardless of the city. Pakistan is still a third world developing society, and compared to Western cities (even the smaller ones), Lahore lags behind in many fields, including infrastructure, health, and security.
Suburban Lahore is pretty clean (but expensive) and life is pretty good (considering that you are middle-/upper-class), but still not as good as the West. For most people who’ve lived there (such as myself), they would generally have a bias in favor of life in Lahore, because the home is where the heart is. Visit it at least a few times before you decide to live there. There are large super-markets and grocery stores, but also even more bazaars around the corner that sell the freshest of all foods (all organic).
You will find poverty in the city-center and noticeable people of wide income gaps on your daily commute almost anywhere in the city. You may see one person driving a convertible BMW on the road and in the next lane, a man with four kids on a motorbike. The security in the cities has also deteriorated quite a bit in the last five years. Corruption is nearly rampant. A lot of the youth and the younger generations in the middle-/upper-class are “Westernized” (or try to be) and they are saturated mostly in the suburbs, while the lower-classes (unfortunately) are the only ones majority-wise who still uphold traditional values. Lower-classes generally do not mingle with the upper ones, not even the middle ones, unless if they are performing services (i.e. no befriending between such groups). It can often be seen as a “class-based” society, in my opinion, and is becoming very materialistic.
There is a lot of historical architecture, shrines, tombs, forts, etc. found in many parts of the city. Because the society is still quite conservative, relatively, you will not find the same type of nightlife in Lahore (at least not in the same numbers), i.e. open nightclubs, strip clubs, bars on every street, etc. However, all these do exist but in fewer quantities and often not very open to the general public. There is a historical Red Light district called Heera Mandi (Diamond Market); you can research about that on your own because I won’t delve in to it. Lahore is known for its food! You will find almost every kind of food in Lahore, whether it be in fancy restaurants or on the street (both are amazing). The Lahoris love eating out at night. You can easily find many American fast-food chains there as well (subway, mcd, boston pizza, etc).
Overall, I would much rather prefer living there (instead of Toronto) and the only thing that restricts me is my work and my marriage. Take a few trips and see for yourself. Good luck!