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Monthly climate in Rio Grande, Puerto Rico

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Rio Grande features a tropical monsoon climate (Am).Temperatures typically range between 25 °C (77 °F) and 28 °C (82 °F) through the year, but rarely can drop to 21 °C (71 °F) or can rise to as high as 31 °C (89 °F).The average annual precipitation amounts to about 1057 mm (41.6 inches) and receives 247 rainy days on the 1 mm (0.04 inches) threshold annually.Rio Grande enjoys an average of 3915 hours of sunshine throughout the year, and daylight varies from 11 hours 2 minutes to 13 hours 12 minutes per day.

Monthly average temperatures in Rio Grande, Puerto Rico §

The warmest months in Rio Grande are July, August and September, with daily mean temperatures ranging from 28 to 28 °C (82 - 82 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 25 to 25 °C (77 - 77 °F) throughout the day. On average each year, Rio Grande 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 Rio Grande, 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 29°C
(84°F)		 28°C
(83°F)		 28°C
(83°F)		 29°C
(85°F)		 30°C
(87°F)		 30°C
(87°F)		 30°C
(87°F)		 31°C
(88°F)		 31°C
(89°F)		 31°C
(87°F)		 30°C
(86°F)		 30°C
(87°F)
Mean maximum 28°C
(82°F)		 28°C
(82°F)		 28°C
(82°F)		 28°C
(83°F)		 29°C
(85°F)		 29°C
(85°F)		 30°C
(86°F)		 30°C
(87°F)		 31°C
(88°F)		 30°C
(86°F)		 29°C
(85°F)		 29°C
(84°F)
Average high 27°C
(80°F)		 26°C
(80°F)		 27°C
(80°F)		 27°C
(81°F)		 28°C
(83°F)		 29°C
(84°F)		 29°C
(85°F)		 29°C
(85°F)		 30°C
(86°F)		 29°C
(85°F)		 28°C
(83°F)		 27°C
(81°F)
Daily mean 25°C
(77°F)		 25°C
(77°F)		 25°C
(77°F)		 26°C
(78°F)		 26°C
(80°F)		 27°C
(81°F)		 28°C
(82°F)		 28°C
(82°F)		 28°C
(82°F)		 27°C
(82°F)		 27°C
(80°F)		 26°C
(79°F)
Average low 24°C
(75°F)		 24°C
(75°F)		 24°C
(75°F)		 24°C
(76°F)		 25°C
(77°F)		 26°C
(79°F)		 26°C
(79°F)		 26°C
(80°F)		 26°C
(80°F)		 26°C
(79°F)		 25°C
(78°F)		 25°C
(77°F)
Mean minimum 23°C
(73°F)		 22°C
(72°F)		 22°C
(72°F)		 23°C
(73°F)		 24°C
(75°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(78°F)		 25°C
(77°F)		 24°C
(76°F)		 24°C
(75°F)
Minimum 22°C
(71°F)		 21°C
(71°F)		 22°C
(72°F)		 22°C
(73°F)		 23°C
(74°F)		 24°C
(76°F)		 24°C
(76°F)		 25°C
(77°F)		 25°C
(77°F)		 24°C
(76°F)		 23°C
(74°F)		 23°C
(74°F)

Compare climate in Rio Grande with other places

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

Monthly average precipitation in Rio Grande, Puerto Rico §

Rio Grande usually has the most precipitation in September, October and November, with an average of 22 rainy days and 135 mm (5.3 inches) of precipitation per month.The driest months in Rio Grande are January, February and April. On average, 52 mm (2.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Rio Grande, 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) 49 (1.9) 52 (2.1) 63 (2.5) 55 (2.2) 74 (2.9) 69 (2.7) 110 (4.3) 111 (4.4) 154 (6.0) 140 (5.5) 112 (4.4) 68 (2.7)
Average precipitation days (≥ 1 mm) 15 19 18 17 21 21 24 24 24 22 21 21

Monthly sunshine hours in Rio Grande, Puerto Rico §

The sunniest months in Rio Grande are May, July and August, when the sun shines an average of 11 hours 23 minutes a day.Least sunny months in Rio Grande: January, February and November receive an average of 9 hours 34 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Rio Grande, 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 257 301 348 347 356 344 354 348 318 315 301 319
Mean daily daylight hours 11h 9m 11h 32m 12h 2m 12h 33m 12h 59m 13h 12m 13h 5m 12h 42m 12h 12m 11h 41m 11h 15m 11h 2m

Solar UV radiation in Rio Grande, Puerto Rico §

Rio Grande experiences the highest level of ultraviolet (UV) radiation in April, August 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 Rio Grande UV Index data.

Average daily maximum UV levels by month for Rio Grande, 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 13 13 13 12 13 14 12 9 8