1) My sister is going to spend three weeks, from 4 August to 24 August in the USA.

2)In particular, they will be visiting Disneyworld first, then they'll be flying to Yellowstone Park and finally they will round off (?) their journey with a three-day stay in New York.
3) Can you please suggest to me what kind of clothes shall they pack in their suitcase?
4)Will they have to pack anoraks, wollen/fleece jumpers and heavy hoodies, too?
5) Will they have to buy phone cards to phone to Italy? Which is the cheapest way to phone from there?

Thank you all for your cooperation.
The questions above were real questions.

1) To find out the weather in the USA during the dates your sister will be visiting, you can check a reliable weather website or app. Input the specific locations of Disneyworld, Yellowstone Park, and New York to get accurate forecasts for each place. You can also consider checking historical weather data to get an idea of the average temperatures during that time period.

2) To find out what kind of clothes your sister should pack, take into account the weather forecasts for each location. Pack clothing that is appropriate for the specific weather conditions during that time. For Disneyworld, which is in Florida, you can expect hot and humid weather, so lightweight, breathable clothes like t-shirts, shorts, and dresses would be suitable. For Yellowstone Park, which is in Wyoming, you should prepare for cooler temperatures, especially in the mornings and evenings. Layers, such as long-sleeve shirts, sweaters, and lightweight jackets, would be recommended. New York can also have variable weather in August, so a mix of light and warm clothing should be packed.

3) As for rounding off their journey, it seems like you meant to say they will be ending their trip with a three-day stay in New York. In that case, they should take into account the weather recommendations mentioned above for New York.

4) Whether they need to pack anoraks, woolen/fleece jumpers, and heavy hoodies depends on the weather forecasts. If the forecast indicates cooler temperatures at any of the locations during that time period, it would be wise to pack such warm clothing items. However, if the forecasts suggest warm or hot weather throughout their trip, they might not be necessary. It's always a good idea to check the weather forecast closer to the travel dates and adjust the packing accordingly.

5) To phone Italy from the USA, they can consider the following options:
a) Purchase a phone card: They can buy international phone cards that offer competitive rates for calling abroad. These cards usually have a set number of minutes for international calls.
b) Use a calling app: There are various calling apps available that allow users to make international calls using an internet connection. Some examples include Skype, WhatsApp, Viber, or Google Voice. These apps usually require the person in Italy to have the same app installed on their phone.
c) Check with their mobile service provider: They can contact their mobile service provider to inquire about international calling plans. Some providers offer international calling add-ons or discounted rates for certain countries.

To find the cheapest way to phone Italy, they can compare the rates and fees associated with the options mentioned above. It's also worth considering if they will have access to a stable internet connection, as this can impact the suitability of using calling apps.