I'm going to Iwate Prefecture, Japan on April 19th. What's the weather like there? Wear a sweater, cotton-padded jacket or windbreaker? Does it often rain? Do you need an umbrella?

influenced by geographical conditions, the climate in Iwate prefecture also has its own unique characteristics. The climate in Aoyu Mountain range is snowy in winter in the Sea of Japan, while the climate in the northern highlands is plateau and basin. Coastal areas have a maritime climate, but in the area north of Miyako City, it is affected by the cold current and the temperature is generally low. The temperature in Aoyu Mountain is low, and there is a lot of snow in winter, with an annual precipitation of 2, mm to 2,5 mm. The mountain valley has an inland climate with a precipitation of 1,1mm. [3-4]

I don't think it's necessary to bring an umbrella. Japanese umbrellas are very cheap, but raincoats can be brought, because Japanese raincoats are still very expensive. Don't you have any predecessors? Better ask them.

I looked at the map. It's very close to Aomori. It should be very cold. Get ready. Teenagers.

the most important point. Remember to learn more Japanese. The most important point.