How to get the weather kit with anemometer working using arduino (UNO)?
According to the above setup only rain bucket unit works. 

And as jsotola mentioned both the anemometer and the rain bucket sensors are simple switches, so a simple sketch can be written that reads the switch state and light LED (pin13) if the switch is activated and turns off LED if switch is not activated and that can be done for each of the switches separately.

But instead I took a shortcut.

Fixes:


The wind vane part (on analog pin A0) starts working only when I connect the I2C vcc pin to 5 volts pin instead of 3.3 volts pin of UNO.
Had to ditch the https://github.com/switchdoclabs/SDL_Weather_80422 library's wind_speed reading method and adopting and merging into the http://cactus.io/hookups/weather/anemometer/davis/hookup-arduino-to-davis-anemometer-wind-speed code and adding up the wind_gust function from https://github.com/sparkfun/Weather_Shield/blob/master/Firmware/Weather_Shield_Weather_Station_V12/Weather_Shield_Weather_Station_V12.ino makes the anemometer with rain-bucket with the exact same setup fully functional.