Temp forecast for my area (John B Mountain / Flat Landing, Maine) as well as surrounding coastal areas is almost always 10F low, which makes a big difference in the rest of the forecast in the summer when forecast is below dewpoint (fog) and actual can be way above (relatively clear). Winds seem to be pretty accurate
I'm a sailor and an amateur meteorologist (over 50 years), so I understand forecast a models better than most, but there is something in the model that needs a tweak
I think the site is otherwise pretty awesome, and I have learned to adjust forecast w/ "local knowledge"
So which model do you use? They are 3 in you area : ECMWF, GFS and NAM. May be one is better for temperature forecast in Maine.
You can use these features to check which is the best one: