Hello, I have the maximum temperature and the minimum temperature for all days of 2019 in a specific coordinate. Also, I have the differences between them. What I would like to proove (or not) is that the temperature difference in August and September is significantly higher than the rest of the year. I had the idea to take the mean and standard deviation of each month and use a test with the hypothesis that they are equal. However, I do not know if it is entirely correct or if there is a better approach to this problem. Any suggestion?