00609 / 00611 Wireless Weather Thermometer

Product Review (submitted on September 2, 2011):

At first it seemed that the hygrometer was inaccurate. This was based on comparing my local weather station readings online. The problem is that relative humidity is highly variable and can change greatly depending on many factors, including the amount of grass, other greenery, soil moisture content, etc. The true way to test the accuracy is to determine the wet bulb temperature in your immediate vicinity. Along with the temperature, you can calculate what the relative humidity should be. After trying this, I found that accuracy of the hygrometer to be as described on the package (+-5%).