Outdoor meter boxes must withstand rain, UV exposure, dust, temperature variations, and condensation. The enclosure roof, door panels, viewing windows, locks, cable entry fittings, and base structures are often vulnerable spots for outdoor protection. The label "meter box" does not automatically denote specific IP or NEMA ratings; verification based on project specifications is essential.

Designs must evaluate top water shedding, door frame sealing, bottom drainage, and cable entry according to installation orientation. Free-standing meter boxes require verification of foundation elevation and ground ponding risks, while wall-mounted units need checks for wall anchoring and rear load bearing. Coastal, high-humidity, or intense-sunlight environments also require checking the weather resistance of materials, coatings, viewing windows, and seals.

Temperature swings alter internal box temperatures and moisture states. Meters, terminals, and protective components can heat up under direct sun or high electrical loads, potentially forming condensation after nighttime cooling. Where needed, assess sunshields, thermal insulation, heat exchangers, or anti-condensation solutions; ensure any ventilation openings align with required ingress ratings.