Lewis was the fastest of the five drivers to brave a timed lap in FP2, clocking a 1:48.719s to end the session 0.799s ahead of Force India's Esteban Ocon.
The three-time World Champion was second quickest in the morning, narrowly missing out on the top spot to title rival Sebastian Vettel. Lewis set the pace for much of the session, running the team's latest aerodynamic package introduced in Malaysia.
"It's been an interesting day, the car is feeling much better than it was in Malaysia," said Lewis. "I'm glad that we had the dry session for FP1.
"In FP2, there was a lot of rain, but it felt really important to go out and assess the track and see how the car was feeling as the car was not good in the wet in Malaysia. The car feels back to normal, so I'm ready to race.
"The fans are pretty special here - to be out there in the rain, waiting for us to go out through the whole of FP2. That's also another reason I wanted to go out and at least give them a little bit of a show. So hopefully at least they got to see something as not many cars went out."