Contact lenses can dry out and become uncomfortable in highly air-conditioned environments, such as airplanes, shopping malls, and restaurants. Therefore, it is recommended to use glasses.
Potential side effect of warmer weather is that the lenses may dry out more quickly. In this case, eye drops are often the best way to deal with the moisture levels.
If you like to swim, daily disposable contact lenses are recommended. As any other, monthly or yearly lenses would get introduced to many infection causing microorganisms present in the water. Also, swimming pools contain chlorine which can irritate your eyes.
Always, carry a protective eyewear like sunglasses for daylight condition and transparent sports glasses for low light condition, when you go out in any muddy area.