Neptune is a very cold planet that is very dark, cold and windy and Neptune is also the last planet in the Solar System.
The planet Neptune has very strong storms as well with very high winds and the average temperature that Neptune sees year round is - 353 Fahrenheit which is very cold and very below freezing.
If you think our winters here on earth are cold then try going to Neptune for a bit and you'll certainly change your mind and think our winters here on earth are hot compared to cold temperatures on Neptune.