For some reason we used to choose lighter things at summer. We don't just change to summer clothes, we often change also things like what we eat. So same happened with painting for me. I haven't used watercolors, maybe in fifteen years. I actually don't even have those anymore. But I found three water color pencils. It was nice to have something simple to do at outside, and not carry everything with me. Just notebook, three pencils, a brush and little jar of water. Pencils aren't as well, known, then actual watercolors or aquarelles. But both are also as pencil shape. They work like pencil, so you can do more specific lines and details, but they blend in like regular watercolors, when you add the water with a brush. This is so time taking, that I think it was the reason, why I stopped doing this. The susceptibility comes from thin and light layer. And every one needs to dry before you can add new one, What darker the color is, then there is more layers. Doing this outside in summer heath, was actually really helpful, and speed the process.
View things to help if you are using pencils. Use quality paper. Thin and light weight paper can't take that much water and pressure then multiple layer will do. Higher weight paper is better. Even more if it's specially for watercolors or aquarelles. Use as little water then it possible. And add color as lightly you can at once. You can line areas with wax crayons. Water doesn't blend that and it helps that color doesn't run to everywhere. Even you shouldn't use so much water anyways. @FromMadeByMeri