In following these standards you will ensure your weather station is providing the most accurate readings possible. Obviously, you will need to adapt these guidelines to your particular installation and may not be able to obtain the exact results listed. These standards, at minimum, should provide guidance in the mechanics involved in obtaining accurate sensor readings. Avoid areas that are affected by pressure changes caused by compression due to closing doors in small rooms, avoid jarring, vibration and rapid temperature changes. Avoid direct sunlight, drafts from open windows, and air currents from heating or cooling systems.
Air flowing over a sensor can cause artificially low readings.
It should be at least 3 feet above ground level, but less than 100 feet above average terrain. If installed in a closed room, venting to the outside may be necessary. Call the nearest Coast Guard unit for your local magnetic variation. If installed on a tower, it should be at the top, but a side bracket can be used and should be at least 3 feet away from the tower side. Towers should be of an open design to permit free air flow.