This is how yours truly keeps cool on a hot day.

When it's hot weather, that's the PERFECT time to weed the pond.
You get a 'chore' done and keep cool at the same time!
I wear 'biker's shorts' which fit tightly and guarantee no 'critters' get inside the pant legs.
I take some tubs with me to float both my clippers in, and the plants/debris I take out.
Always check your 'removals' for critters before putting them on the compost pile though!