Rule for masculine · der
Weather & directions → der, but Wetter/Gewitter are das.
Many nature- and weather-related nouns are masculine in German, just like the cardinal directions: der Osten, der Westen, der Süden. This is a semantic rule, fairly rare (14 words, 0.6% of our course), but useful for this small group of nouns. Watch out though: the base word for "weather" itself is an exception - das Wetter is neuter, and so is das Gewitter (thunderstorm). So the rule holds for directions and individual phenomena, but not for the umbrella word "weather" itself.