The warmest month (with the highest average high temperature) is July (83°F).
The month with the lowest average high temperature is January (39°F).
The month with the highest average low temperature is July (69°F).
The coldest month (with the lowest average low temperature) is January (26°F).
The best month for swimming (with the highest average sea temperature) is August (74.1°F).
The coldest month (with the lowest average sea temperature) is February (39.9°F).
The month with the longest days is June (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9.3h).