It was 13°C yesterday but the temperature change by -18.6°C overnight. What is the temperature now?

To find the current temperature, we need to subtract the temperature change of -18.6°C from the initial temperature of 13°C.

13°C - 18.6°C = -5.6°C

Therefore, the temperature now is -5.6°C.

To find the current temperature, we need to subtract the temperature change from yesterday's temperature.

Yesterday's temperature: 13°C
Temperature change overnight: -18.6°C

Subtracting the temperature change from yesterday's temperature:
13°C - 18.6°C = -5.6°C

The current temperature is -5.6°C.