Good question. I like the full zip fleece hoodies, rather than the quarter zip style, but that's just me. The first one I took was too light for an early April camino. Even with a base layer, a long sleeve shirt, the fleece hoodie, and my rain jacket, I was cold some days when I stopped moving. I replaced it with a heavier hoodie (looks the same, but heavier cloth) for my later caminos, and that combo is just right. With a long sleeve base T-Shirt, a long sleeve polyester "sweater" which is really just a heavy-ish shirt, my trusty hoodie, and a rain jacket, I'm comfortable down to -5C, which is colder than you are likely to see.
Hard to know anything about that particular fleece without feeling it, but you are on the right track. Make sure you have a long sleeve shirt (not your base layer, wear that too) to go under it, and a rain jacket on top, and you should be fine. Its about layers. When assessing the weight of any particular layer, you have to think about it in conjunction with everything else in the pack. A very light fleece will be fine if you have a warm long sleeve as well. If your long sleeve is not very warm, a heavier fleece will be needed.