Based on the weather in Livingston, West Lothian, United Kingdom as of September 30, 2016 4:09am local time

Why? Because it's cold. simple as that.
Current Conditions
Mostly Cloudy
Temp: 48.2°F9°C
Wind: 10.8 MPH17.5 KPH
Precipitation: None

Next 2 hours: Yes

Next 4 hours: Yes

Next 8 hours: Yes