Calculating average daily temperature

[GhostLoveScore]

I have a automated weather station and I'm collecting data from it. And I was wondering about something. I calculate average daily temperature like this: (T₀₇+T₁₄+2*T₂₁)/4 . During the summer I am calculating it like this (T₀₈+T₁₅+2*T₂₂ )/4 . That's taking into consideration daylight saving time which puts the clock one hour forward. Is that the correct way to do it during the summer?

 

[mfb]

The average over 24 hours should be independent of the time zone. Why do you use this formula? Especially if you seem to have more data points than you use?

 

[GhostLoveScore]

Thanks for your answer mfb.
I save data every hour. I use that formula because I found it at my country's meteorological service web page.
When I first started calculating average daily temperature I used all 24 data points but later I found the formula in my original post and decided that I should use that.

Actually, my weather station reads data from sensor every 128 seconds but I am not sure if there is any use to store all that data.

 

[mfb]

Maybe the web page doesn't have hourly data. It looks like a weird weighted average. Averaging over all 24 hours should be better.