Just came across a social media post advising that today and tomorrow (9/9 and 9/10) they expect pretty extreme weather in parts of Iceland (wind, snow, treacherous driving). There is a website dedicated to these topics, definitely a good idea to check before any trip to Iceland no matter the time of year. It includes updates on volcanic activity, too: https://safetravel.is/
Yes, basically summer bypassed Iceland this year. My husband was stuck in Grundarfjordur due to weather last month. The alerts have been numerous. I head over there again next week. I always check several websites for road and weather conditions multiple times each day while we are driving, no matter the time of year.