When the weather is hot, it does not beckon you to sit on your meditation cushion. This is absolutely fine. Let it call you outside where you can bring a new level of bliss to your practice.
Do what you need to do before you head out to make yourself comfortable. Sunscreen (all natural of course), bug spray (yup, the same) and a sunhat may help keep you from being a miserable meditator.
When you're good to go, step outside and find a place to sit that has more birdsong than traffic noise.
With your eyes closed, make yourself aware of your surroundings. The fluctuations of the wind. The sounds of leaves rustling and birds chirping. The heat of the sun followed by its soft retreat.
Marvel at the amazing fluctuations of everything around you as you sit in stillness.
Reflect on each sound and each moment, and try not to get carried away in analytical thoughts or memories. Feel the earth supporting you, and the sky above you.
After ten or fifteen minutes, open your eyes. The view was right where you left it, and the world continued to turn as you took time for yourself.
Before yet another summer goes by too quickly, take some time to slow down, to unwind and to savour the moment.