Hose construction has come a long way. That being said, out here in the desert, hoses are still a maintenance item. I tend to replace rubber hoses and tires every 3 years from the date of installation, regardless of mileage. Their weak points are almost always where the clamp meets the hose, and I always use OE constant tension spring clamps. The hose starts to swell over time, gradually increasing pressure on those points. During a WOT run, it'll tear enough to start losing coolant.
In VA, I don't see it being that much of a problem. Just check to make sure the hose is still flexible, with no signs of cracking or tearing. Once it gets to that point, replace them in pairs (i.e. both upper and lower radiator hoses together).
When you're driving in 120-135°F, a lot of heat builds up under the hood and that's a different story altogether. Sat in traffic with the AC on full blast, you're looking at coolant temperatures in the range of 220-235°F, depending on how long you've been idling. Driving down the road, it'll drop to 212-218°F depending on engine speed. That definitely takes its toll on all the hoses.