This is the 585th most frequent Danish word.
vejr
"Vejr" means "weather" in English.
'Vejr' is used here as a direct noun referring to the current atmospheric conditions.
Hvilket vejr har vi i dag?
What weather do we have today?
'Vejret' denotes the general atmospheric conditions in Denmark.
Vejret i Danmark kan være ret uforudsigeligt.
The weather in Denmark can be quite unpredictable.
'I vejret' indicates that these conditions are observed as part of the overall weather.