Agrigento - museum and temple site - how much time to allocate?

We spent two nights there. We ended up going to the sites later in the first day as the rain had cleared up. I would allow at least four hour, historic site( memorable) and the museum( excellent). Most of the historic sites in Greece include an excellent museum.
Do not bother driving up the hill to the city center,
not pleasant, beggars etc

Suki, thank you.
The Temple grounds are extensive. Is the "4 hours" just for them? Adding time for the museum?

We visited the temples at Paestum. And have been to Athens. So temples, in general, aren't new to us. But we love to stare at them and take out time.

I tried to find YouTube videos to give an idea of the museum collection. Pottery is the main thing I saw in them - pottery won't captivate us.

The temple site could be about 3 hours going slow.

We didn’t go to the museum and spent 3 hours walking amongst the temples.

We went with a guide we picked up at the entrance. I would highly recommend a guide. We spent about three hours touring the temples. We got there at 5 pm which turned out to be a lovely time.

We didn't go to the museum.

Three hours is about right. The museum did not rate highly with me. If you’re concerned about time you could totally give it a miss. Parking at the museum is a royal pain too.