When is the best time of year to perform radon testing?

Answer: There is no significant difference.
Explanation: Radon can be tested at any time of year as long as proper test conditions are maintained. Levels can vary seasonally and are often higher in colder months, but there is no reason to wait for a particular season to test. For the best estimate of year-round exposure, a long-term test is more representative than a short-term test.

Answer: Winter
Explanation: Radon testing can occur at any time throughout the year, however testing during the winter months when heating systems are running is considered the optimal time to test.

Answer: Winter
Explanation: Winter tends to provide the highest radon level in homes due to the stack effect, however when involved in a home purchase, the radon test needs to be performed during the inspection contigency.

Answer: Winter
Explanation: Typically testing in winter will show a higher test result. It's also much easier to keep the closed house conditions which are part of an accurate test. But, the most accurate test is a long term test which lasts 90+ days. The longer test will give a more accurate AVERAGE level under normal living conditions in the property

Answer: There is no significant difference.
Explanation: This seems to be a matter of opinion, I haven't seen true data in my testing to say it's a certain time of year. Due to it being a gas, the barometric pressure can dictate the levels. If your performing a long term test, I recommend doing it mid spring or mid fall. Testing during those times gives a balanced test in my opinion.

Answer: Unsure
Explanation: There is no good answer to this question. Radon will be higher in the winter months if the ground is frozen but the numbers can still be higher during the spring , summer , or fall if the ground is saturated with water.

Answer: There is no significant difference.
Explanation: Radon levels can vary significantly throughout the year.