Many users unknowingly (or because they have no other choice) mount their weather stations near obstacles.  Local obstacles significantly decrease sensor accuracy and force their sensors, i.e. an anemometer, to measure their roof’s turbulence instead of its intended purpose to measure prevailing wind speed and direction. Balcony or terrace weather station mounting leads to temperature readings 3-10°C degrees warmer due to wall heat.  Wind speed and direction readings are completely unreliable due to proximity of house walls which channel air flow independently of prevailing winds. Rooftop weather stations suffer less from inaccurate wind direction than wind speed readings.  Their temperature and humidity inaccuracy tends to be significant as roofs tend to absorb and radiate large amounts of heat from the sun.

That is why wireless weather station is sufficient and convenient way of not having to pull wire through doors, windows, poles and roofs.  Wireless weather stations enable you to mount the weather station away from obstacles that may limit its accuracy.