Why is the weather in Guangzhou colder than that in Maoming? Thank you, and God bless you.

16 Guangzhou weather light rain during the day1℃ no persistent wind breeze light rain at night 8℃ no persistent wind breeze 17 Guangzhou weather cloudy during the day 15℃ no persistent wind breeze cloudy at night 10℃ no persistent wind breeze1. +08℃ no persistent wind, breeze, dark night, cloudy night, 12℃ no persistent wind, breeze, Guangzhou, the weather in the next few days 10 days/city/Guangzhou, the next few days will not be very good.