Monarch Butterfly Biosphere Reserve
Mexico UNESCO World Heritage Site
The Monarch Butterfly Biosphere Reserve is a biosphere reserve in Mexico. It is a UNESCO World Heritage Site and is one of the 66 sights of the country listed on this site.
Planning a visit
The best time to visit is between January and April, when daily highs range from 13 °C to 18 °C and rainfall is minimal. From March to April, rain occurs on about 5 to 6 days per month. In contrast, the summer and early autumn months are much wetter, with July seeing about 29 days of rain and highs of 16 °C.
To reach the reserve, you can fly into Adolfo López Mateos International Airport in Toluca, which is 77 km away. The site is also located 119 km from Mexico City. This reserve is one of the 45 most looked-up sights in Mexico on English Wikipedia.
Weather by month
The warmest month is May, with an average high of 20 °C. The wettest is July, with about 277 mm of rain.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high, °C | 13 | 15 | 18 | 20 | 20 | 18 | 16 | 16 | 16 | 15 | 15 | 14 |
| Average low, °C | 0 | 1 | 2 | 5 | 6 | 7 | 6 | 6 | 6 | 4 | 2 | 1 |
| Rainfall, mm | 26 | 19 | 9 | 21 | 70 | 197 | 277 | 247 | 195 | 90 | 22 | 11 |
| Rainy days | 2 | 2 | 5 | 6 | 15 | 21 | 29 | 29 | 25 | 16 | 7 | 2 |
Temperatures and rainfall: 1981–2010 averages for this spot (4 km grid), from CHELSA. Rainy days: 2015–2024, NASA POWER.
