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Monthly climate in Juncos, Puerto Rico

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Juncos features a tropical monsoon climate (Am). Temperatures typically range between 24 °C (75 °F) and 27 °C (81 °F) through the year, but rarely can drop to 19 °C (66 °F) or can rise to as high as 32 °C (90 °F). The average annual precipitation amounts to about 1279 mm (50.3 inches) and receives 270 rainy days on the 1 mm (0.04 inches) threshold annually. Juncos enjoys an average of 3898 hours of sunshine throughout the year, and daylight varies from 11 hours 2 minutes to 13 hours 11 minutes per day.

Monthly average temperatures in Juncos, Puerto Rico

The warmest months in Juncos are July, August and September, with daily mean temperatures ranging from 27 to 27 °C (81 - 81 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 24 to 24 °C (75 - 76 °F) throughout the day. On average each year, Juncos experiences 327 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Juncos. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum29°C
(84°F)		28°C
(83°F)		29°C
(85°F)		30°C
(86°F)		31°C
(87°F)		31°C
(88°F)		31°C
(88°F)		31°C
(89°F)		32°C
(90°F)		31°C
(88°F)		30°C
(86°F)		30°C
(86°F)
Mean maximum28°C
(83°F)		28°C
(82°F)		28°C
(83°F)		29°C
(85°F)		30°C
(87°F)		30°C
(86°F)		31°C
(87°F)		31°C
(88°F)		31°C
(89°F)		30°C
(87°F)		29°C
(85°F)		29°C
(84°F)
Average high27°C
(80°F)		27°C
(80°F)		27°C
(80°F)		28°C
(82°F)		28°C
(83°F)		29°C
(84°F)		29°C
(85°F)		30°C
(85°F)		30°C
(86°F)		29°C
(85°F)		28°C
(83°F)		27°C
(82°F)
Daily mean24°C
(76°F)		24°C
(75°F)		24°C
(76°F)		25°C
(77°F)		26°C
(79°F)		27°C
(80°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		27°C
(80°F)		26°C
(79°F)		25°C
(77°F)
Average low22°C
(72°F)		22°C
(72°F)		22°C
(72°F)		23°C
(73°F)		24°C
(75°F)		24°C
(76°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		24°C
(76°F)		24°C
(75°F)		23°C
(73°F)
Mean minimum21°C
(69°F)		21°C
(70°F)		21°C
(70°F)		21°C
(70°F)		22°C
(72°F)		23°C
(74°F)		24°C
(75°F)		24°C
(75°F)		24°C
(76°F)		24°C
(75°F)		22°C
(72°F)		22°C
(71°F)
Minimum19°C
(66°F)		20°C
(69°F)		20°C
(69°F)		21°C
(70°F)		22°C
(72°F)		23°C
(74°F)		23°C
(74°F)		23°C
(74°F)		23°C
(74°F)		23°C
(74°F)		22°C
(72°F)		21°C
(71°F)

Compare climate in Juncos with other places

Compare temperature, precipitation, sunshine, UV index in Juncos, Puerto Rico with other places around the world.

Monthly average precipitation in Juncos, Puerto Rico

Juncos usually has the most precipitation in August, September and October, with an average of 26 rainy days and 171 mm (6.7 inches) of precipitation per month. The driest months in Juncos are January, February and December. On average, 56 mm (2.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Juncos. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)48 (1.9)53 (2.1)80 (3.2)77 (3.0)98 (3.9)99 (3.9)124 (4.9)130 (5.1)200 (7.9)183 (7.2)120 (4.7)66 (2.6)
Average precipitation days (≥ 1 mm)161821202423242527272322

Monthly sunshine hours in Juncos, Puerto Rico

The sunniest months in Juncos are May, July and August, when the sun shines an average of 11 hours 22 minutes a day. Least sunny months in Juncos: January, February and November receive an average of 9 hours 32 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Juncos. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours257302346346355342353349313312299318
Mean daily daylight hours11h 9m11h 32m12h 2m12h 33m12h 59m13h 11m13h 4m12h 42m12h 12m11h 42m11h 15m11h 2m

Solar UV radiation in Juncos, Puerto Rico

Juncos experiences the highest level of ultraviolet (UV) radiation in April, May and September, when the maximum UV index can reach values of 13 - 14, which corresponds to the Extreme category of sun exposure. January, November and December are in the Very High exposure category. In these months, the maximum values of the UV index do not exceed 9. For more detailed information, check out our hourly Juncos UV Index data.

Average daily maximum UV levels by month for Juncos. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)911131314131213131298