weather
Precise weather forecasts in Saudi are difficult to obtain, but the weather usually doesn’t vary far from the averages for each area.
AccuWeather.com/en/sa is a good source for monthly averages and TimeandDate.com/weather offers good information as well.
Pick a city from your primary destination and review daily highs and lows for the month you will be here.
Nights will be cold during the winter and warm up considerably during the day, so it’s best to plan to dress in layers.