I have to agree with OHBowhunter... You can't have 1 pair of boots for that big range of temperature...

I have 2 pairs:
1 pair of Irish Setter Deer Slayers 800g in 8" for cold weather
I use these for colder weather big game hunting and ice fishing.

1 pair of Rocky uninsulated Stalker extreme in 8" for warm weather
I use these for early season big game hunting and all year round for upland and small game when i do alot of walking.

I live in Michigan where the temps can get a bit colder than you mentioned up north. These two pair work great for me...

Good Luck.