How can weather conditions affect field sobriety test performance?

Weather conditions can significantly impact field sobriety test performance due to various factors associated with adverse environments. For instance, inclement weather such as rain, snow, or strong winds can affect both the officer conducting the tests and the individual being tested. Slippery surfaces can make it difficult for a person to maintain balance, thus affecting their performance on tests that require physical coordination, like the walk-and-turn or one-leg stand tests.

Additionally, elements such as visibility issues from fog or darkness can hinder an officer's ability to assess the individual's movements accurately. Poor weather can also lead to distractions that distract the individual being tested, making it harder for them to focus on the instructions provided. In essence, adverse weather conditions can impair the validity of the field sobriety tests, as they create an environment that does not allow for a fair assessment of an individual's impairment level. This underscores the importance of considering environmental factors when evaluating the results of these tests.