Questions & Answers about Het weer is vandaag erg koud.
Why is the adjective koud without an -e at the end?
Because it comes after the verb is to describe the weather, rather than directly in front of a noun. When used this way (called a predicative adjective), adjectives in Dutch never get an extra -e.
Can I use heel instead of erg in this sentence?
Yes, absolutely! When modifying an adjective, heel and erg both mean "very" and are almost always interchangeable. Het weer is vandaag heel koud is just as correct.
Doesn't erg mean "terrible" or "bad"?
It can! When used on its own as an adjective, erg means "bad" or "terrible". However, when it is placed immediately before another adjective like koud, it acts as a degree modifier meaning "very".
Why is vandaag in the middle of the sentence instead of at the end?
In Dutch word order, time words like vandaag (today) like to step in early, usually right after the verb. While you will sometimes hear the time at the end, putting it early is the most natural way to build a Dutch sentence.