Our bills are similar to yours, low of $175.00 highest last summer $489.00. I am trying to conserve, I am going to start unplugging electronics overnight to see if that helps.
Our gas bills are not as bad, as low as $30.00 in the summer, highest bill last winter was just under $300.00. We prefer to be cold rather than hot, so I keep the heat at 66 degrees & use the woodstove to supplement the heat & keep costs down.
I guess I never did budget because the highest gas bill coincides with a lower electric bill & the highest electric bill comes with the lowest gas bill...
We don't have gas, so that is one reason why our electric bill is pretty high. It is the heater and the air conditioner that make ours jump up in the hottest and coldest months. But...I am willing to live with that to be comfortable.
Like you, I would prefer to be cold. I can turn down the thermostat to conserve in the winter but there is not a chance that I am turning it up in the summer and being HOT! I would rather pay the enormous bill!

Especially when the a/c's are running during the summer - and when I have to use the heat day and night in early spring and late fall..