You should be able to exceed 32mpg without problems even with the A/C running. Your drive is long enough (18 miles) to warm up the engine and get great mileage. I notice about a 3 mpg hit when I run the A/C in the afternoon. Mornings are high 60s to low 70s lately and I can get by without A/C. Keep in mind a temp of LO overrides ECO. You have to keep the temp 66F or higher to use ECO mode.

I find moderate acceleration gives better mpg than slowly accelerating. Try and conserve momentum, brake lightly and early if needed so regen captures most of the energy. If traffic allows it, let your speed build on the downhills, and slowly drop back to your normal speed going back up hill.

I had my windows tinted to help with the heat and really like the results. I don't even notice the sun on my arm anymore! I had Formula One Pinnacle 35% tint on the sides and rear. It blocks 50% of the heat and 99.5% of the UV. Great stuff.