Saturday, 29 March 2014

In areas near cities, it tends to rain more on Saturdays than in any other day of the week!

It's not something we think about often, but big concentrated human populations can have a noticeable effect on weather. Here's why: car exhaust and other sources of human pollution lead to the production of clouds, which increases the chances of rain. A lot of that pollution is generated during the weekday, increasing the chances of rain as the week goes on. On Saturdays, those chances peak, because pollution has built up over the 5 days of the workweek.
In fact, this effect can be dramatic. In heavily populated areas that are near the cost, like the Eastern Seaboard of the United States, it's 22% more likely for it to rain on a Saturday than on a Monday.