Answer:
1.Sean is worried because its cold.
2.The weather in York on Saturday morning will be cold and cloudy and it may rain in afternoon.
3.The students will visit the National Railway Museum if it will rain.
4.On Sunday it will be nice,warm and sunny.
5.Kate doesn't want to go to the museum because it is boring (tu ai scris anna dar eu nu am găsit)
6.They might meet Count Dracula in the Whitby