
The state of the atmosphere, mainly with respect to its effects upon life and human activities. As distinguished from climate, weather consists of the short-term (minutes to months) variations of the atmosphere.

The natural tendency of a sailboat to come up into the wind. The helm must be held over to keep the boat from coming up

The ability of a seaman to foretell weather by the appearance of the sky, change of wind direction, etc. was handed down in the form of proverbs. Some well known are:

Caulking and weatherstripping to reduce air infiltration and exfiltration into/out of a building.

An instrument of the aspiration condenser type which measures the concentration and mobility of small ions.

A precipitation gauge consisting of a receiver in the shape of a funnel which empties into a bucket mounted upon a weighing mechanism. The weight of the catch is recorded as inches of precipitation.