Valtteri clocked a 1:21.406 on the SuperSoft tyre in the afternoon, ending the day +0.056s ahead of Lewis. Championship leader Sebastian Vettel was a tenth further back in third for Ferrari.
"First of all it was nice that it stayed dry today because all the forecasts said that the rain could affect the running and we could have limited running before qualifying and the race in the dry," said Valtteri.
"But we got our full plan done. In FP1 we were actually ahead of the plan because we were still worried about the weather.
"I think it was a good day - at least I have a better feeling than I had after the Friday in Spa, everything started on the right foot. Initially in FP1 we went slightly in the wrong direction with the setup, but we managed to change it around for FP2 and the car felt a lot better.
"Overall, it was a positive day, the car is looking strong, but obviously it's the next two days that count."