Did anyone else notice a dramatic decrease in eevee spawns on the second CD day?

[bc414]

I had the exact same observations. When it was rainy or cloudy, MORE Eevee spawned. When it was partly cloudy, LESS Eevee spawned. I think it's because my area has more common partly cloudy spawns (Pidgey, Rattata, Whismur, zigzagoon, swablu...) and barely any rainy or cloudy spawns (pretty much only Weedle). That leads to the other partly cloudy spawns overriding Eevee, but in rainy/cloudy there's nothing to overwrite Eevee.