It depends on what you like. I spent my entire life until I was 27 in the frigidity of Northern Minnesota. After that, I rather enjoy the fact that nearly every day in Austin is a t-shirt day.
If you're coding, you're in the air conditioning when it's 95°F and out in the mornings/evenings. I spent 9 months in Austin starting in February and it's not that bad. I grew up in Atlanta (85-95°F and 80% humidity) and summertime was about the same but the winter was nicer.
I still miss the food. I can get the quality here in NYC in a restaurant near the barrio but not the prices.
Citing air conditioning doesn't mesh very well with describing the weather as awesome. Lows of >70 with humidity mean you're going to need some AC help sleeping, too.
Compared to, say, Santa Cruz (just over the hill from the Silicon Valley) with yearly average ranges from 39-60 (Jan), to 52-76 (Aug), with most of the days from the spring thru fall in the high 60s, low 70s, which I personally think is ideal.
That means 3 months of "a bit too hot" (although 90ies isn't too bad), and 9 months of "pretty good". Someplace like Oregon, where I grew up, has 2/3 months of beautiful summer weather, and 9 months of mostly crappy weather.
These two sentences seem contradictory to me.