Edilia, Redseahorse did a brilliant job of proofreading. As I am having a couple of busy days, I am not going to proof or anything. However, by making a cursory inspection, I thought you could be interested why the replacing of "cold weather on Saturday".
So, "today´s a cold Saturday just how I like it" -in an academical text (an essay etc.) it would be ''today is a could Saturday just how I like it'' was changed because we, normally, don´t say "cold weather on...(weekdays) a given day"
Since you are referring to weather conditions
/the type of weather
of a given day, which can be described by words like "cold/hot/warm/cool/freezing" (if you mean temperature) or to other weather elements "cloudy/gloomy/foggy/overcast/clear" (if you mean clouds).
That is, you are describing the weather in certain day (as you see it at the moment - in passing), not the weather as whole, of a region or in a more serious way (with the help of satellites, forecasting, weathermen/weatherwomen information/weather stations information etc...so a more detailed study of what will happen in a given day.)http://www.vocabulary.cl/english/weather.htmhttp://www.english-at-home.com/speaking ... e-weather/
By the way, your sentence could also be "it´s a cold Saturday today, just how I like it."
Hope it somehow helps.