The climate in Juncos is tropical, characterized by warm temperatures year-round with an average high of 85°F (29°C) and an average low of 74°F (23°C). The region experiences a wet season from May to November, with the highest rainfall occurring between August and October.
Hydrologically, Juncos is home to several streams and rivers, including the Río Valenciano, Río Gurabo, and Río Blanco. These waterways contribute to the diverse ecosystem of Juncos, supporting a variety of flora and fauna. The hydrology constituents include freshwater species, such as fish and amphibians, as well as a plethora of bird species that can be observed throughout the municipality.
Outdoor enthusiasts visiting Juncos can engage in various recreational activities. The region offers opportunities for hiking, birdwatching, and exploring the lush tropical forests. Nearby natural attractions, such as the El Yunque National Forest and the Carite State Forest, provide additional options for hiking, camping, and immersing oneself in nature. The natural beauty and outdoor recreation options make Juncos a must-visit destination for nature lovers.
Juncos receives approximately mm of rain per year, with humidity levels near 78% and air temperatures averaging around °C. Juncos has a plant hardyness factor of , meaning plants and agriculture in this region thrive during a short period during spring and early summer. Most plants will die off during the colder winter months.