The climate in Mexico is tropical with a rainy and dry season and little temperature fluctuation from season to season.
The temperature in all areas of Mexico typically ranges between 50°F and 90°F throughout the year. Average annual humidity is around 70%. Mountainous regions and any area above sea level may experience cooler temperatures and lower humidity. Mexico receives the most annual rainfall during rainy season, most regions receive about 40 inches of rain per year.
Within Mexico City the weather is dry and mild. Mornings and nights are usually fresh, unlike the afternoons, which are usually warmer. The average temperature between December and March is around 70°F, while during the warmer months of March and April thermometers can go up to 90°F.
Weather conditions can utterly vary within the mountainous areas of northern Mexico, where winter seasons are very cold and usually freezing during the night. On the Pacific coastline, summer temperatures reach 95°F around the southern areas of Mazatlán or Puerto Vallarta.
As in any country, weather depends on your region, but generally Mexico enjoys a warm, tropical climate, with little temperature fluctuation from season to season.
Mexican Dry Season: November to May
Mexican Rainy Season: June to October