10. Mexico
The average summer temperature in Mexico is around 113°F (45°C) in summer. The summer season is also a rainy season, so the summers are not just hot, they are humid, too. May is usually the warmest month and July is also very warm, but it is also the wettest month. The weather is pleasant year around, and the winters are also nice, with the average temperature of 68°F to 77°F (20°C to 25°C).