Calling this script

[snippsat]

Would that be done like this?

Would only need data as argument,as dayweather is loop variable you create bye using data.
from Weather import * never do this.

A simple test.

# main.py
from weather_data import data
from displayData import displayData

def main():
    displayData(data)

if __name__ == '__main__':
    main()

Output:
Weather for: Paris

Other files all in same folder.

# weather_data.py
data = {"region": 'Paris'}

# displayData.py
def displayData(data):
    # print data
    print("Weather for:", data["region"])