I got mine in Feb, and I'm in NY. it was cold and my first tank was 40mpg. my second was 44mpg, and I'm in the low 50s now at 5000 miles.
one of the first thing most people do here, is pump up the tires to the max cold rating on the tire. (mine are the OEM bridgestones at 44psi) Honda recommends 32psi which gives you a much softer ride. I don't find the handling or cornering troublesome at 44psi- in fact it's alot better than my old explorer. This right away brought up my mileage about 5mpg.
alot of my improvement was from warmer weather- which you already have- but really, you have to 'learn' how to drive it efficiently. You need to use AC in texas, but unless you're driving really fast (over 65mph) on the highway all the time- you should be able to get mid-high 40s.

much depends on your driving style, speed & conditions

I found the best learning tool was the instant consumption guage (FCG) and the trip display. I use trip B for my tank mileage and trip A for individual trips. If you reset trip A, each new trip you make, you will really learn quickly what works and what doesn't. basically 'drive above your average' on the FCD and avoid quick starts. ease back on the gas to 60 or better on the FCD when you can. the car gets it's best results between 35-45mph. if you have a commute where you can drive a 45mph road you'll really see your mpg shoot up.

I'd think both you & the car need to 'break in'. There's alot of advice and people here who get outstanding mileage and are more than willing to pass it on. it's a great car, and you should have alot of fun driving it!
Kate

KLC
2005 HCH CVT 'Verdigeek'