More savings?

Is it me or is the weather not so hot these days. I find that my bedroom feels cooler at night lately. The air-cond temperature is still at 24 deg Celcius. If hubby is away, i'll turn the air-cond off around 2 or 3am when the room is at its coolest. Then sleep with the fan on low. Can last us till morning around 8. This way, can save on electricity bill or not? Wont know till the next bill comes.