The info reported by personal weather stations around me (I look them up on Weather Underground) varies.
Here are current readings from three PWS all within a mile of me.
Station #A #B #C
Brand Davis Unknown OregonScientific
Temp 69.2F 74.7 69.4
Humidity 70% 68 37
Wind Speed 0mph 0 NA
Wind Direction -- -- NA
Pressure 29.95in 30.18 29.98
Rainfall 0in 0 NA
We get some wind in the winter, and have some large old trees. I'm interested in how much wind is too much, as far as falling branches and other scary tree behaviour goes. But wind measurements by the nearby stations vary a lot, E.g. on 6/4/09 there was a thunderstorm with high winds and falling trees/power lines.
http://www.oregonlive.com/portland/index.ssf/2009/06/trees_and_power_lines_fall_to.html
I looked up these stations' logged measurements for that day and see they don't agree at all.
6/4/09
Wind Speed (max) 28mph 6 NA (the 6 is not a typo)
Rainfall (max) 0.22in/hr at 1814 hrs 0.24 at 1850 hr 0.12 at 1814hr
I figure these readings are mainly being affected by location of the home and the sensors. I can't tell which system has been set up correctly by a "good amateur" so that it reflects the weather at my house specifically.
And, let's face it, I'm looking to geek out a little bit.