Scrapes the Farmer's Almanac to do very basic rain prediction using mean values over a specified number of years.
TODO: Add support for multiple sources and query fields.
Usage:
$ ./rain_scrape.py 5-23 --years 15
Based on the last 15 years, there is a 43.75 % risk of rain or drizzle on 5 - 23 2015, and the average temperature will be 64.36 F. If it does rain, expect 0.1586 inches of rain.