aim is to estimate weather-dependent signatures in the early phase of the pandemic, while
controlling for socio-economic factors and non-pharmaceutical interventions. We identify a
modest non-linear association between mean temperature and the effective reproduction
number (Re) in 409 cities in 26 countries, with a decrease of 0.087 (95% CI: 0.025; 0.148)
for a 10° C increase. Early interventions have a greater effect on Re with a decrease of …