The weather in my area has been up and down, hot then cold. Outside temps will drop quickly and my room continues to stay hot and I've noticed condensation on the windows. Normally it would do this when it's really cold out and lots of houses around me it does the same, however since it's not that cold and people aren't using their heaters it looks strange that the windows on only one room in my house are dripping with sweat. Any ideas?

dehumidifier?

Yea that can be a security breach to a trained eye.

Well, I'm a noob, but do you have a fireplace? They generate CO2 and lower immediately local humidity.

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Can you put something onto the surface of the window to stop this? Like a curtain that is held in place by some black plastic such that it is physically touching the window. I would also make sure your humidity is not too high, but obviously if its hot inside and you have a cold window the water vapor in that hot air is going to condense when it hits that window. I'd recommend the curtain thing to start.

Could you add some secondary glazing to the inside of the window with an air gap? The condensation is due to the warm moist air hitting the cold glass and dropping to dewpoint. The higher the %RH the harder it is to control the condensation.
The second layer of glazing (clear film, polycarbonate or acrylic sheet) will be much warmer and helps prevent the air from reaching dewpoint so easily..no condensation

Good advice 6951A, i must type faster

I knew this guy once... he would build a box, bigger than the window hole of the used room. He would seal the edges with foam and hang the box over the window. not only did this stop light from penetrating in, but from penetrating out as well. At one point, he even got fancy enough to put a small light in the box, to simulate an occasionally lit room behind the existing curtain.

That takes care of all kinds of problems, but it can be a worthwhile hassle to build, install. Another barrier between your window cool and your room heat though. Slap up an inside storm window (the kind with the clear plastic and the double sided sticky tape, that you blow dry until it's tight) would provide yet another barrier.

just tossing it out there. ;)

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