Hi, this might be Araneus miniatus. The hump across the abdomen and lack of a furrow patern are what led me to this ID. I like how she took advantage of your window. She’s an orb web spider, known for strong big circular webs. This is the first time I’ve identified an A. miniatus (hope I got it correct!), they’re less common than other species of orbweavers or people are less likely to take photos of them. Thank you for sharing your photo with us!