Answer:

colder

Answer	Crossword Clue
COLDER	Harder to follow, as a trail
COLDER	Less friendly
COLDER	More chilly

COLDER	More wintery
COLDER	Like the Arctic, compared to most of the planet
COLDER	Typical weather forecast.
COLDER	Weather word.
COLDER	Weather word
COLDER	Less cordial
COLDER	Fall forcast
COLDER	Less genial

COLDER	More frigid
COLDER	Further away, in a way
COLDER	More gelid
COLDER	Not as warm