All of our enclosures have some sort of weatherproofing. The level to which your enclosure will protect your electrical items is covered by the enclosures IP rating. To get the low down, check out IP Ratings explained
To help you on your way, this page highlights what you should be looking for if you want your enclosure to be weather or water proof.
Most of our enclosures will give some protection against the elements. How much protection you need depends on the type of weather you anticipate.
If your enclosure is to be located in an area that is regularly rainy, or has damp weather, anything from IP66 would suit you.
If the weather is simply a little dusty, you could probably use an IP65 enclosure.
Enclosures that are totally waterproof - those that are constantly immersed in water, or immersed for a long period of time carry IP 67 (for temporary immersion in water) or IP 68 (for prolonged immersion in water under pressure)