Why am I so thirsty lately?

I have been drinking a lot of water these past two months, usually over 60 oz a day, and I will still wake up in the morning with a sore dry throat. I don't drink or smoke, I don't feel sick, and my diet doesn't contain a lot of sodium. Also I have seasonal allergies that are kicking in and I haven't been taking my allergy medication, could this be a possible culprit?