I have a spot for the unit in the open grass area for rain reading and (I guess ok for outside temp as long as the fan can combat the direct sun heat influence that i have had bad experience with before).
Though the wind reading wont be in line with what you should officially be recording. At 1.5m height in that location it would be reasonably sheltered from wind. Though it will show the wind at location, human and low structure height (height where it matters to me) rather than at the official recording height (what is it 10m or so?)
The biggest issue I have had with inaccuracy is temp meters that don't react to sudden changes predominantly due to thermal mass of the structure it's housed in. For example inexpensive clocks with built in digital temp gauges. Leave them to settle in a temp controlled environment and they will settle to a reading that is within .1C of a expensive fluke meter i have. Though as the temp changes, say night time they will hold there previous temp for bleeding it of over many hrs before reacting to the true temp. Again when being heated back up again.
If the weather station can give me temp readings within 1 deg C or so of true readings that's ok. Will keep tabs on it at first along side some better less automated metering kit I have
Rainfall within say 5% would be ok. Will keep a check on it along side the manual rain gauge for a while.
Wind, all I wouldn't be using it to get some idea of the wind gust speed during storms (rather than hanging offside of the deck saying...Sh*t look at the trees flex! I wonder how strong that wind is?
Offgrid 2008, Selectronic PS1 6kw/48v inverter, x 2 Midnite solar classic 150 MPPT, 3960w NE PV 24 x 165w BP panels, 4200w NW PV 21 x 200w DAQO PV, 16x400ah lithium.