regression of rainfall data in excel for mac

Providers of structured weather data include Visual Crossing Weather Data, NOAA and Open Weather Map.

In this article, I discuss multiple ways to load weather information into Microsoft Excel.

Historical Records and Weather Forecast There are two type of weather information you may want to import in to Microsoft Excel.

Historical Records Historical records tell us what the weather was i n the past.

How much did it rain How cold was it Analyzing this data in a workbook allow you to answer questions such as Did my store revenue decrease because it rained and What kind of weather should I expect if I schedule my wedding for this date Past weather records allow to identify the expected weather for the future Historical records are collected by weather stations so typically we need to look up data by finding the closest weather station or a combination of nearby stations.

In the latter case, the weather history at a particular point will be a an average of the nearby measurements.

Some data providers provide historical data that is already processed so that they have historical records for nearly all global locations.

Weather Forecast The weather forecast is typically available for the coming 515 days.

This depends on the organization that is calculating the forecast.

These weather forecasts split the world into a grid of tiny squares and then calculate the weather at each point.

The provider of the data then looks up the data for the cell you are requesting based off address (or latitudelongitude).

Longer term forecasts can also be found with time scales ranging multiple months into the future.

For day to day planning such a forecast may not be useful but they are highly beneficial to people such as farmers who deal with the general growing season.

Screen scraping Screen scraping weather data is a fairly simple process copy the data from a web page (either manually or automatically) and have Excel try to extract the required data.

If the selected web site data is a simple table, such as the historical data available on Weather Underground, ( ) then Excel is good at extracting the information.

If you find a source of data that is amenable to screen scraping, the process can be very quick and easy (and cheap) but there are a couple of pitfalls: Screen scraping is normally not allowed by a web sites term and conditions.

It is not a process that is suitable for automatically refreshing data set.

The process is too dependent on the exact format of the incoming web page to be a reliable approach.

File and web data connection import A much more reliable approach to finding weather data is to find a source that provides data that can be imported using an Excel Web Query.

If the data provider supports saving weather data a local file to your computer, then you can also import weather using in a structured table format such as CSV (comma separated values).

Better providers will also include web accessible content that allows a direct import from the web into the workbook.

This make automatically refreshing the data extremely straightforward.

Older versions of Microsoft Excel support both CSV and Getting External data from web sites and so this approach will work across all major versions of Excel.

Regression Of Rainfall Data In Excel For Mac