You never know what type of weather you will face on your trip. Obviously, some climates are easier to figure out than others. However, if you’re going to be traveling for a few days, you don’t want to be stuck in your room in case of rain or even frost.
Considering how bulky gear is, traveling weather-specific gear is ludicrous. Think about bringing layers that will allow you to easily adapt to the temperature and to the weather instead without having to travel with a specific piece of clothing for each scenario. It will save you space and you will find layers more versatile than dedicated gear.
For instance, bring a rain shield that fits on top of your riding jacket, long johns for the cold, a pair of thin gloves that fit under your riding gloves, etc. Heated layers are also an option to consider bringing along if you’re braving a colder climate.