Why You Should Check Radon Levels in Every Season

Radon Doesn’t Stay the Same Year-Round

Radon gas is unpredictable—and seasonal changes in weather, home ventilation, and ground pressure all play a role in how much of it seeps into your home. That’s why it’s not enough to test your home for radon just once.

If you’ve already done one test (great start!), here’s why you should plan to test again throughout the year.

Why Radon Levels Fluctuate by Season

Winter: The Most Common Time for Elevated Radon

Homes are closed up tighter to keep out the cold.
Less ventilation = more trapped radon.
Frozen ground traps radon and pushes it into your home.

Spring: Shifting Soil and Melting Snow

As snow melts and ground thaws, pressure changes can cause spikes.
Heavy spring rains can also increase radon infiltration through foundation cracks.

Summer: Lower Levels—But Not Always

Air conditioning can create negative pressure that pulls in radon.
Homes that stay closed during hot days can still trap radon.

Fall: Another Spike Risk

Cooling temps mean closed windows, less airflow, and rising indoor radon again.
Soil compaction and seasonal storms can push more radon indoors.

Why Seasonal Testing Matters

A one-time test might miss peak levels.
Health risks come from long-term exposure, not one day or week.
Testing in multiple seasons gives you a complete picture of your home’s radon patterns.

Recommended Testing Schedule

We recommend:

Initial test (if you’ve never tested your home before)
Follow-up test in a different season (e.g., winter and summer)
Annual retest—especially after major home renovations, floods, or changes to your HVAC system

How to Stay Protected Year-Round

Use a short-term test kit during different seasons to monitor fluctuations.
Invest in a continuous radon monitor if you want real-time, ongoing results.
Mitigate immediately if any test shows levels over 4.0 pCi/L.

The Bottom Line: One Test Isn’t Enough

Radon is a year-round risk, but its levels can shift dramatically with the seasons. That’s why proactive, seasonal testing is one of the best ways to protect your family and your home.

At Radon Quote, we make it easy to go from testing to taking action. If your seasonal test comes back high, we’ll help you find the right radon mitigation kit—fast.

Already tested this season?
Get a free quote for a mitigation kit that fits your home and your needs.