It was -8° this morning but the temperature has gone up 11° over the course of the day. What is the temperature now?

The temperature now would be -8° + 11° = 3°.

To find the current temperature, we need to add the increase of 11° to the initial temperature of -8°. Adding -8° and 11° gives us a result of 3°. Therefore, the current temperature is 3°.