We will be staying at vacaville from 11 to 14 December.
Could anyone advice me of the weather there for these 3 days / nights ?
I was told is between 6 to 10 degree C
YOu can check that out real easy at Accuweather's website: [original link]
Just put in Vacaville, CA in the window that says AccuWeather.com for.......go.
Look for the next 5 days and click on it. It looks like partly sunny on Saturday and 61F high, sunny on Sunday and 63F high with Monday sunny to partly sunny and a high of 66F. Tuesday says occasional rain and a high of59F. Remember this is only a forecast. :-)
As for the night time temps it will get down to the average low 40F at night, or 4.44C. :-)