A friend of mine is a heavy sweater. It's just the way he is. If we go on the same hikes together, I won't even break a sweat while he will be completely soaking wet with salt stains all over his shirt.
Personally, I started to sweat a lot less after I got in better shape. I only ever drip with sweat now when it is humid. Washington state, where you say you are located, is humid even though it is cold. You might feel less sweaty out in the desert.
Female, 5'3", 48, Starting weight: 163lbs. Current weight: 135.
Starting squat: 45lbs. Current squat: 145 x 4.