Call me you want to consider a move to Longview or east Texas. It's a great place to raise a family, start a business or retire
Dallas is a nice area yes to live in. I moved here from Chicago 13 years ago and I don't miss the snow. Here is a breakdown of what the humidy does on average.
January through April then Sept. to Dec. morning to end of day about 80% drops to 60%.
May & June morning 88% in the morning then drops to about 62%.
July & August 79% in the morning then drops to 50% Although there are always a few days where it feels like 100% humidity. Unfortunately no, you cannot sleep with the windows open in the summer. It is just too hot. The AC runs 24/7
Right now it's 45 outside and the humidity is 81%
I am in Ca and am anticipating a move to Plano, Tx soon from Bakersfield, Ca. Be careful with your movers, read the reviews on the net. The negative is making think hard about a Ryder truck, but have no one to help me make the drive, I am 70..........sigh You will love Texas and the Texans!
I moved to Dallas area from Foster City. I don't think it is any more humid myself. Depending on where you live in the bay area though, the temp difference is probably much more extreme. I'd say no way most summers can you leave the windows open at night or in the day. This summer there was only one day over 100F, but there are summers that have 30-40 days in a row over 100F. Nights might be 80F. Winter can be pretty cold too. Too cold to leave the windows open. Just depends on the year though. The weather is just pretty strange and unpredictable here. We've also had a couple of years where it was 90s in January....shorts and t-shirt weather with people sunbathing in the parks.
Although I'm not in Dallas and Naima has already answered your question with great numbers, I just wanted to throw in my two cents as well.
I'm originally from Indiana and so like Naima, I'm so glad to be done w/ dealing w/ snow and the freezing cold! I'm also a fan of water sports and outdoor activities, so TX has been a Great place to be!
Here in San Antonio, I think it' s not the heat that really can get you.... it's the HUMIDITY! From around May through August, the humidity can be unbearable and it isn't unusual to wake up after a full night of your AC running and see all your windows covered in fog! From November to about April, I'd say it's probably a bit more similar to your CA weather as it's much more mild and not extremely humid.
Bottomline: if you can make it through the late spring and summer months.. then you'd be loving it here!