Visualisation: probabilistic rainfall forecast from CSV

Question

Note: I have a basic idea of how shapefiles work & how to save maps as images.

I'm a super noob on QGIS. I have this CSV which provides me details such as

• State
• Average rainfall (mm)
• Probability % - Levels (Normal,Above,Low)
  

Sample Data:

How can I visualise this on a map using QGIS? Please direct me to source on how to use the above dataset on QGIS & how to plot a legend alongside it. (I have the shapefiles of the states)

Answer 1

At first you should remove the second line in your CSV file. So your first line looks like:

State;Average rainfall;Probability Below;Probability Normal;Probability Above

use comma instead of semicolon if you are using american format.

Now load this CSV into QGIS like this: Layer --> Add Layer --> Add delimited Text layer:

Choose the settings you need.

Now you need a Georeferenced file of the states. Like a Shapefile. Add it and perform a join:

To make this join permanent, export your layer as new file.

You can now visualize your data in symbology tab:

using a weird example here as I'm too lazy to create new data, but you should get the point