@idefix37
Oh, okay, thanks!

It's not the most intuitive format but ok, guess Windy.com still has something to improve.

@crazyukrainian Depending on what Unit of measurement I have selected the value displayed changes to something like "X g:Y" where X and Y are integers.

What does "0 g:2" being displayed as wind speed mean?

Here is the relevant part of the Python code I am using to upload the data:
"ambient_str= "{0:.2f}".format(ambient_temp)
ground_str= "{0:.2f}".format(ground_temp)
humidity_str = "{0:.3f}".format(humidity)
pressure_str="{0:.4f}".format(pressure)
wind_speed_str= "{0:.3f}".format(wind_speed)
wind_gust_str= "{0:.3f}".format(wind_gust)
wind_average_str= str(wind_average)
rainfall_in_str= "{0:.3f}".format(rainfall)

r= requests.get(
    url +
    creds +
    "&winddir=" + wind_average_str +
    "&wind=" + wind_speed_str +
    "&gust=" + wind_gust_str +
    "&rh=" + humidity_str +
    "&temp=" + ambient_str +
    "&precip=" + rainfall_in_str +
    "&mbar=" + pressure_str +
    "&dewpoint=" + ground_str )

I have used the rest of this code before with WeatherUnderground and there wasn't such an issue, so it's probably not that I am getting an invalid wind speed value calculated.