Weather will likely play an important role when you plan your trip to Little Diomede Island, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and July, with an average temperature of 4°C, while the coldest months are February and January, with an average of -15°C. The snowiest months in Little Diomede Island are March, December, January and May, with each month seeing an average of 69 cm of snowfall.