Just two ideas for you, 1 Don't buy a house until you have lived there a year. 2 Be prepared to go grocery shopping at 2:00AM when it is still 117 degrees out. Don't be fooled by the averages shown in your reply. My Doctor asked me if I had ever spent a summer in Bull Head, I said no, and he said do you have some place cool to go for the summer
The only real surprise in the Idaho weather was the very high winds in the Spring. A steady 45 knots with gusts to 70 caused my rain gutters to pull off the edge of the roof. A local contractor replaced the damaged sections and affixed the gutters with barn bolts (a very long screw) instead of the convention nails that look like tent spikes.
The highest temp on record in Bullhead City appeared to be around 123. I can believe the 117 figure. Especially in areas with asphalt parking lots.
I lived across the river in Laughlin, NV for 3 years... year round. The summers are hot, but so what? Everything is air conditioned, and hot desert nights are GOOD for a lot of activities.
Nothing like standing in the parking lot of the Ramada and looking up at their thermometer and seeing 126 degrees! I swear, that day, the earth stood still. I've never experienced such total silence. Thickest air I've ever felt.