How to Prepare Your Belongings for Storage in Humid Climates: A Practical Guide

Storage Units


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June 8th, 2025


How to Prepare Your Belongings for Storage in Humid Climates: A Practical Guide
If you live in a coastal or subtropical area like Florida, Georgia, or the Gulf Coast, you know that humidity can cause serious damage to stored belongings. From mold growth to warped wood, the effects of long-term moisture exposure can cost you time and money. Fortunately, by following a few key steps, you can protect your valuables—even in high-moisture environments. Whether you’re moving, downsizing, or just decluttering, this practical guide offers the best storage tips for humidity so your items come out in the same condition they went in.

Why Humidity Is a Problem in Storage Units

Humidity refers to the amount of moisture in the air. When you store items in a closed, unventilated space (like a traditional storage unit), that moisture can build up. Over time, it can:
  • Cause mold and mildew to grow on clothes, furniture, and papers
  • Warp wooden furniture or flooring
  • Rust metal appliances, tools, and electronics
  • Damage photos, books, and artwork
  • Leave your stored items smelling musty or damp
This is especially true in areas where relative humidity regularly exceeds 60%—common in places like Hudson, Florida, and much of the Southeast U.S.

1. Choose the Right Type of Storage Unit

Not all storage units are created equal. If you’re storing belongings in a humid climate, climate-controlled storage units are your best defense.

What is a Climate-Controlled Storage Unit?

These units maintain a stable temperature and humidity level, typically between 55°F and 80°F, with humidity levels under 60%. This helps prevent warping, cracking, or mold growth. According to Move.org, climate-controlled units are ideal for:
  • Furniture (especially wood and leather)
  • Electronics
  • Antiques
  • Musical instruments
  • Clothing and bedding
  • Documents and photos
While climate-controlled units may cost more, the peace of mind and damage prevention is often worth it.

2. Use Plastic Bins Instead of Cardboard Boxes

Cardboard absorbs moisture, making it a breeding ground for mold and mildew. In humid environments, even strong moving boxes can weaken, warp, or collapse over time. Instead, opt for airtight plastic storage bins. These are more resistant to humidity and pests, and they can be stacked more safely.

Pro Tip:

  • Choose bins with rubber gasket seals to create a moisture-resistant barrier.
  • Avoid overpacking bins to allow airflow and prevent crushing delicate items.

3. Wrap and Protect Furniture Properly

Furniture—especially wooden, leather, or upholstered pieces—needs extra protection in humid climates.

How to Prepare Furniture for Humid Storage:

  • Clean all surfaces thoroughly. Dirt, food, or moisture residue can attract mold.
  • Use furniture polish or wax on wood to create a moisture barrier.
  • Cover furniture with breathable cotton sheets or moving blankets. Avoid plastic wrap, which can trap humidity and cause condensation.
  • Disassemble large items to reduce pressure points and allow better airflow.
  • Elevate furniture on pallets or bricks to protect from ground moisture.
If you’re storing leather furniture, condition it before storing and cover it with breathable material, not plastic.

4. Dry Everything Before You Store It

One of the most overlooked storage tips for humidity is making sure that everything going into the unit is completely dry. This includes:
  • Clothes and linens (wash and dry them fully beforehand)
  • Kitchenware (no water in pots, glasses, or appliances)
  • Tools and garden equipment (wipe them down after cleaning)
  • Coolers or water toys (dry both inside and out)
Even a small amount of moisture can grow mold quickly in a closed space.

5. Pack with Desiccants and Moisture Absorbers

To further fight humidity, add moisture control products to your storage bins and unit.

Common Options:

  • Silica gel packets: Great for small boxes, clothes, and electronics.
  • DampRid containers: Absorbs excess moisture from the air.
  • Charcoal deodorizers: Help reduce odor and mild dampness.
These products are inexpensive and easy to place throughout the storage unit. Just be sure to check and replace them periodically if you’re storing long-term.

6. Store Electronics the Smart Way

Electronics are especially sensitive to humidity and temperature changes. Moisture can lead to corrosion of circuits and metal components, or permanent failure.

How to Store Electronics in Humid Environments:

  • Back up your data before storing.
  • Remove batteries and store them separately (or dispose of them).
  • Wrap electronics in anti-static bags or bubble wrap.
  • Place devices in plastic containers with silica gel packets.
  • Label cords and keep them neatly wound and secured.
For valuable or irreplaceable electronics, indoor climate-controlled units are highly recommended.

7. Label Clearly and Allow Space for Airflow

Avoid cramming everything wall-to-wall in your storage unit. Leave air gaps between bins and walls to allow ventilation. Additional humidity control tips:
  • Label bins by category so you don’t need to dig through everything.
  • Stack heavy bins on bottom and lighter ones on top to prevent collapse.
  • Use shelving to keep bins off the floor and promote airflow.
  • Leave a central aisle so you can access and inspect items easily.
Keeping things organized helps you spot moisture problems early and makes regular check-ins easier.

8. Inspect Regularly and Rotate Items

If you’re storing long-term in a humid region, check your unit every month or two.

When inspecting:

  • Look for signs of condensation on walls or bins.
  • Check soft materials for mildew or musty smells.
  • Replace any used-up desiccants or DampRid containers.
  • Wipe down surfaces that feel damp.
It’s also a good idea to rotate or reposition items occasionally, especially furniture or tightly packed bins. This helps prevent mold from growing undisturbed.

9. Keep Your Unit Clean and Pest-Free

Humidity and pests often go hand in hand. Insects like silverfish, cockroaches, and termites are attracted to warm, damp environments and cardboard.

Preventative Tips:

  • Avoid storing food or scented products (like candles or lotions).
  • Clean all items thoroughly before storing.
  • Use sealed bins, especially for fabrics or paper items.
  • Add natural repellents like cedar blocks or lavender sachets.
Facilities with regular pest control schedules are best, especially in humid locations where pests thrive year-round.

10. Know What NOT to Store

Some items are particularly vulnerable to humidity and best avoided altogether unless you have full climate control.

Avoid storing:

  • Perishable food items
  • Delicate musical instruments (unless climate-controlled)
  • Open liquids or chemicals
  • Wet gear (diving suits, beach towels)
  • Candles, makeup, or anything that can melt or mold
If you're unsure, consult your storage provider for specific recommendations.

Conclusion: Smart Storage Protects Your Belongings Year-Round

Humidity doesn’t have to ruin your stored items. With the right preparation, you can safely store furniture, clothing, electronics, and more—even in hot, humid places like Florida or the Gulf Coast. To recap, your best bet is to:
  • Use a climate-controlled storage unit
  • Pack with moisture in mind
  • Store with airflow and elevation
  • Inspect regularly and use desiccants
  • Choose plastic over cardboard
By following these storage tips for humidity, you can keep your belongings safe and sound until you need them again. For more help choosing a storage solution, check out this detailed resource from SelfStorage.com.