hot
having a high temperature /hɒt/
cold
having a low temperature /kəʊld/
snowy
with snow falling or covered with snow /ˈsnəʊi/
foggy
difficult to see because of fog /ˈfɒɡi/
Examples
“It's very hot in summer.”
“It's cold in winter. Wear a coat.”
“It's snowy in the mountains.”
“Be careful — it's foggy today.”