It's unknown. These types of viruses sometimes do ebb and flow with the weather, and as it warms up approaching summer they do tend to fade. We tend to see that with the flu season. But there are also very warm countries right now experiencing the spread of this virus - so it's not as if once at a certain temperature (within reason) it's impossible for it to thrive.
Here's the first article that pops up for me that says pretty much the same thing (but much more articulately).