The probability of rain in Shanghai at the end of May is relatively high, so it is advisable to carry an umbrella. According to weather forecasts, mid-to-late May sees frequent showers or thunderstorms, especially possible continuous rain from the 14th, with short-term heavy rainfall and thunder and lightning in some periods. Historical data shows the average number of rainy days in May is 7–12—prepare for rain. Check real-time warnings via Shanghai Weather Network before traveling.