The "Average Amount of Days of Precipitation in April" for any city.

What city and state is it?

What was or is the average number of days of rain in April of that city. How did you find that? Is there a website that will help show this information?

Then how to find the probability of having exactly 10 days of precipitation in the month of April, the probability of having less than three days of precipitation in the month of April, & what is the probability of having more than 15 days of precipitation in the month of April? How did you do this to figure it out? In a sentence or two, if possible, please explain to what those probabilities mean in context of days of each precipitation. Why would any of these situation be considered unusual or why not?