I have had 3 Civics, most recently a 2013 with 1.8L.
Yes, 0W-20 on the cap.
My experience with 2 data points:
-> I used M1-EP 5W-20 year-round here in TN, since that's what my Accord uses (I know this is not a good reason).
Civic 1.8L started immediately and ran peppy and no noise even in the coldest weather, sitting outside.
-> Interestingly and puzzling, this was not the case with M1-EP 5W-30 in cold weather. Slower cranking, a bit of shaking, and lacked pep for the first 2 minutes, only in cold weather.
Several OCI with this experience.
All of the above was oil I purchased & changed myself.
My suggestion for you is to at least continue 0W-20 through the summer.
If you change to 0W-16, I hope you will stay with the same brand & type, then watch for normal stuff - oil consumption, leaks, noise, change in starting, cold pep, etc.
Then be sure to share your experience here!