The following are the temperatures in °C for the first 14 days of January: 7
,

−
4.5
,

−
2
,

0
,

2.5
,

1
,

−
5
,

−
0.5
,

3
,

−
5.5
,

4
,

2
,

−
3
,

4.5

What is the median temperature for those 14 days?
Give your answer as a decimal.