Diffusion

So we went from having temperatures of +30 degrees C last week to +12 degrees C this week. When it was the hottest last week, the inside temperature in my apartment was +29 C according to my meter. It has gone down to 22 today.

Now I am not saying that I understand anything about physics as I pretty much barely passed both the regular courses and physics labs, thanks to my friends and lab partner who carried me on his shoulders, but as far as I understand, when it's significantly colder outside and you have 2 windows open 24/7 to cool down the inside of your apartment, the temperature SHOULD be lower than 22 degrees. Am I right, or am I crazy?

Like I said last week, my body is not equipped to handle 30 C weather and so now while I can, I want to bring the temp. of my apartment down to bearable level, so that if and when the sun comes out again, it takes a little longer than 2 hours for my apartment to become sauna again.

Now here's my problem. According to the physics law of diffusion, hot air should be moving towards colder, and mix, so the temperature decreases. If that's the case, then why isn't the hot air moving OUT of my apartment, letting the colder air move in and COOL DOWN this place? WHY? Bedroom window open. Check. Kitchen window open. Check. Air should be moving...temperature should be decreasing. NO! What's the problem here folks? Why isn't this working?

Am I really that bad at physics that it can't work around me? It should be a natural phenomena. But I think I broke it. Me, proving physics wrong since 1980!

Countdown: 16 days...So looking forward to this!