Six months into the COVID-19 pandemic, and with summer on the doorstep, scientists are still investigating whether weather and climate affect the novel coronavirus. Chelsea Harvey writes in Scientific American that experts seem to be converging on a mix of good and bad news. Hotter, more humid weather probably does dampen the transmission of the virus, at least a bit. But it’s probably nowhere near enough to significantly affect the progress of the pandemic. That’s dismal news for U.S. states that have retreated from social distancing protocols—some without robust testing and tracing programs, and many with infection rates still climbing.