I don't have the source, it was a few years ago, but there is a positive correlation between particulates and precipitation; however it can take several days for the effect to reach maximum "signal" and due to the movement of air masses the actual precipitation can happen some distance (possibly thousands of miles) from the source of particulates: if it rains (or doesn't rain) on the weekend for you, that might have some correlation to location of the source of particulates in your area.

A related effect would seem to be low sulfur fuel reducing ocean cloud cover (compared to previous fuel). I just saw an interactive map of a study using aircraft cruising altitude to impact cloud formation a few days ago.