How do weather observations become climate data?

A. the temperatures that happen during one season are recorded daily

B. weather is recorded over a few weeks in one area

C. weather conditions are measured at thousands of locations every day for 30 or more years

D. air pressure, temperature, humidity, wind speed and direction are recorded for a specific area

Weather observations become climate data: the temperatures that happen during one season are recorded daily.

Explanation:

Millions of weather observations are recorded each day throughout the world. To document the weather and climate several human observers and automated weather stations are used.

The Cooperative Observer Program (COOP) does accurate observations across the country with scientific instruments to measure temperature, evaporation, rainfall, and snow depth.

Each day the COOP observers follow a uniform procedure to validate their instruments and record their data.

The decision makers for cities and towns depend on accurate graphs and maps to help them in planning for different extreme weather events.

'Distance' is how far you walk on your afternoon walk, while you cut across the park, go two blocks out of your way to visit a friend, and cross the street several times in both directions to avoid some big-looking dogs. Every step counts for distance.  Distance only has a size but no direction, because the direction could change a hundred times during the trip. And from the time you leave home until you return home, the distance could be 5 miles or more.   

'Displacement' is very different.  Displacement is just the straight-line distance between the starting point and the end point, regardless of the route that was
followed between them.  It has a size ... the distance between them, and it also has a direction ... the direction from start to finish.  And if you start out from home and return home, then your displacement for that trip is zero, because there's no straight-line distance from the starting point to the end point.