Averaging Hourly Data

I have a lot of weather data for one month that is broken down by the minute.
My end goal is to take the average hourly value of the column values (temp,
humidity, etc.) and create one hourly averaged data point for each column.

So, I am having trouble averaging integer values that occur multiple times
within the same day and hour. Would like to apply this query to the entire
table to average all integers for each day and hour. There are typically
about 25 data points per hour (this number varies), for 31 days in August. I
need to have one average hourly data point for every day in the month.

Any help would be appreciated!

Thanks.