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Monthly climate in Guayanilla, Puerto Rico

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Guayanilla features a tropical monsoon climate (Am).Temperatures typically range between 24 °C (76 °F) and 27 °C (81 °F) through the year, but rarely can drop to 18 °C (65 °F) or can rise to as high as 31 °C (89 °F).The average annual precipitation amounts to about 851 mm (33.5 inches) and receives 168 rainy days on the 1 mm (0.04 inches) threshold annually.Guayanilla enjoys an average of 3939 hours of sunshine throughout the year, and daylight varies from 11 hours 3 minutes to 13 hours 10 minutes per day.

Monthly average temperatures in Guayanilla, Puerto Rico §

The warmest months in Guayanilla are July, August and September, with daily mean temperatures ranging from 27 to 27 °C (80 - 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 (76 - 76 °F) throughout the day. On average each year, Guayanilla 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 Guayanilla, Puerto Rico.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 28°C
(83°F)		 29°C
(84°F)		 28°C
(83°F)		 28°C
(83°F)		 29°C
(85°F)		 30°C
(87°F)		 31°C
(88°F)		 31°C
(89°F)		 31°C
(88°F)		 30°C
(87°F)		 30°C
(86°F)		 30°C
(85°F)
Mean maximum 28°C
(83°F)		 28°C
(83°F)		 28°C
(82°F)		 28°C
(82°F)		 29°C
(84°F)		 29°C
(85°F)		 30°C
(87°F)		 31°C
(87°F)		 30°C
(87°F)		 30°C
(86°F)		 29°C
(85°F)		 29°C
(84°F)
Average high 27°C
(80°F)		 27°C
(80°F)		 26°C
(80°F)		 27°C
(80°F)		 27°C
(82°F)		 28°C
(83°F)		 29°C
(84°F)		 29°C
(85°F)		 29°C
(84°F)		 28°C
(83°F)		 28°C
(82°F)		 28°C
(82°F)
Daily mean 24°C
(76°F)		 24°C
(76°F)		 24°C
(76°F)		 25°C
(76°F)		 25°C
(78°F)		 26°C
(80°F)		 27°C
(80°F)		 27°C
(81°F)		 27°C
(80°F)		 26°C
(79°F)		 26°C
(78°F)		 25°C
(77°F)
Average low 22°C
(72°F)		 22°C
(72°F)		 22°C
(72°F)		 23°C
(73°F)		 24°C
(75°F)		 25°C
(76°F)		 25°C
(77°F)		 25°C
(78°F)		 25°C
(77°F)		 25°C
(76°F)		 24°C
(75°F)		 23°C
(74°F)
Mean minimum 21°C
(70°F)		 21°C
(70°F)		 21°C
(70°F)		 21°C
(70°F)		 23°C
(73°F)		 24°C
(75°F)		 24°C
(75°F)		 24°C
(76°F)		 24°C
(76°F)		 24°C
(75°F)		 23°C
(73°F)		 22°C
(71°F)
Minimum 18°C
(65°F)		 20°C
(69°F)		 20°C
(68°F)		 20°C
(69°F)		 22°C
(72°F)		 23°C
(74°F)		 23°C
(74°F)		 24°C
(75°F)		 24°C
(75°F)		 23°C
(74°F)		 22°C
(72°F)		 21°C
(71°F)

Compare climate in Guayanilla with other places

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

Monthly average precipitation in Guayanilla, Puerto Rico §

Guayanilla usually has the most precipitation in August, September and October, with an average of 20 rainy days and 123 mm (4.8 inches) of precipitation per month.The driest months in Guayanilla are January, February and December. On average, 24 mm (0.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Guayanilla, Puerto Rico.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 19 (0.8) 26 (1.0) 53 (2.1) 55 (2.1) 67 (2.6) 61 (2.4) 90 (3.5) 94 (3.7) 167 (6.6) 107 (4.2) 87 (3.4) 25 (1.0)
Average precipitation days (≥ 1 mm) 6 5 12 15 16 15 17 17 23 21 15 6

Monthly sunshine hours in Guayanilla, Puerto Rico §

The sunniest months in Guayanilla are May, July and August, when the sun shines an average of 11 hours 32 minutes a day.Least sunny months in Guayanilla: January, February and November receive an average of 9 hours 38 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Guayanilla, Puerto Rico.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 261 307 347 350 361 348 358 352 316 316 299 319
Mean daily daylight hours 11h 10m 11h 32m 12h 2m 12h 33m 12h 58m 13h 10m 13h 4m 12h 41m 12h 12m 11h 42m 11h 16m 11h 3m

Solar UV radiation in Guayanilla, Puerto Rico §

Guayanilla 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 Guayanilla UV Index data.

Average daily maximum UV levels by month for Guayanilla, Puerto Rico.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 9 11 13 14 14 13 13 13 13 12 9 8