Located on Fieldcrest Drive, in San Jose, CA. near Taylor Elementary School. The anemometer (wind meter) is on the roof of house. The nearest tree is on the east about 30 feet away. It's height is about the same. Dominant winds are typical of San Jose, coming mostly from North, North West, so I don't think the tree will be a major factor.
Rain detection is clear of all obstacles, and is on our fence between our neighbors and us, clear of all obstacles by at least 15'.
The Thermometer is under a large bush 5' above the ground (dirt), and is always in the shade. There is a cement walkway within a few feet, but by noon it's in the shade.
If you would like to more feel free to contact me via ham. I'm KM6HBH, and am usually listening to WA2IBM (Repeater 145.190), and 147.520 for nearby contact.