Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE weekly_weather ( day_of_week VARCHAR, high_temperature INTEGER )

### Question ###
What is the average high temperature for each day of week?

### Accurate SQL ###

SELECT AVG(high_temperature), day_of_week FROM weekly_weather GROUP BY day_of_week