Good weather and Weather condition

Good weather noun - Weather suitable for outdoor activities.

Weather condition and good weather are semantically related. In some cases you can use "Weather condition" instead a noun phrase "Good weather".

Weather condition noun - The atmospheric conditions that comprise the state of the atmosphere in terms of temperature and wind and clouds and precipitation.

Good weather and weather condition are semantically related. Sometimes you can replace phrase "Good weather" with "Weather condition", this phrases are similar.