My Window Has Been Open For, I Think, Two Weeks

Noticed that over the weekend.  We've had a period of time where the weather is hot enough that I can't keep my bedroom window closed, but it's not so hot (or humid) that we have had to turn on the air conditioning.  And there hasn't been any rain, either.  So for I want to say the past couple weeks fresh air from outside has not only been OK but ideal.  I will say that tonight has gotten a tad chilly, but since we will go past 80 during the day, I have put on a long shirt to sleep in and will continue to leave the window be.

The weather is going to continue to be warm and dry, so I think I can continue to leave the window this open for, gosh, weeks possibly?