The map provided below shows that the lakeshore region will experience the most significant cloud cover impact on April 8th.
As you can see in the diagram produced by NASA focusing on the path of totality for the solar eclipse there is potential for cloud cover in the area of Niagara Falls and Western New York. The forecast is uncertain in terms of whether there will be more clouds or sunshine.
During spring, the state experiences a range of weather conditions including a recent powerful Nor'easter that brought snow to parts of the Adirondacks. Overcast skies and cooler temperatures are expected, but fortunately there are no major weather systems expected on Monday.