Is the Nikon D3300 Weather Sealed?

No, the Nikon D3300 is not weather sealed.

Can I Use the Nikon D3300 In the Rain?

Do not use the Nikon D3300 in the rain or other condition where the camera can get wet. Using the Nikon D3300 in rain or extremely high humidity can allow water to get into the camera body or lens being used.

Water can damage electrical components and cause corrosion which will ruin the camera.

Nikon D3300 Frequently Asked Questions