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Monthly climate in San Jose, Toa Baja, Puerto Rico

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification San Jose 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 20 °C (69 °F) or can rise to as high as 32 °C (90 °F).The average annual precipitation amounts to about 942 mm (37.1 inches) and receives 191 rainy days on the 1 mm (0.04 inches) threshold annually.San Jose enjoys an average of 3889 hours of sunshine throughout the year, and daylight varies from 11 hours 1 minutes to 13 hours 12 minutes per day.

Monthly average temperatures in San Jose, Toa Baja, Puerto Rico §

The warmest months in San Jose 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, San Jose experiences 328 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 San Jose, Toa Baja, 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 30°C
(86°F)		 30°C
(85°F)		 31°C
(87°F)		 31°C
(88°F)		 32°C
(90°F)		 32°C
(90°F)		 32°C
(90°F)		 32°C
(90°F)		 32°C
(90°F)		 32°C
(89°F)		 30°C
(87°F)		 31°C
(87°F)
Mean maximum 29°C
(84°F)		 29°C
(84°F)		 29°C
(85°F)		 30°C
(86°F)		 31°C
(88°F)		 31°C
(88°F)		 31°C
(89°F)		 32°C
(89°F)		 32°C
(89°F)		 31°C
(88°F)		 30°C
(87°F)		 30°C
(85°F)
Average high 27°C
(81°F)		 27°C
(81°F)		 27°C
(82°F)		 28°C
(83°F)		 29°C
(85°F)		 30°C
(86°F)		 30°C
(87°F)		 30°C
(87°F)		 30°C
(87°F)		 30°C
(86°F)		 29°C
(84°F)		 28°C
(83°F)
Daily mean 25°C
(77°F)		 25°C
(77°F)		 25°C
(77°F)		 26°C
(78°F)		 27°C
(80°F)		 27°C
(81°F)		 28°C
(82°F)		 28°C
(82°F)		 28°C
(82°F)		 27°C
(81°F)		 26°C
(80°F)		 26°C
(78°F)
Average low 23°C
(74°F)		 23°C
(73°F)		 23°C
(73°F)		 23°C
(74°F)		 24°C
(76°F)		 25°C
(78°F)		 26°C
(79°F)		 26°C
(79°F)		 26°C
(79°F)		 25°C
(78°F)		 25°C
(77°F)		 24°C
(75°F)
Mean minimum 22°C
(71°F)		 22°C
(71°F)		 22°C
(71°F)		 22°C
(72°F)		 23°C
(74°F)		 24°C
(76°F)		 25°C
(77°F)		 25°C
(77°F)		 25°C
(77°F)		 24°C
(76°F)		 23°C
(74°F)		 23°C
(73°F)
Minimum 20°C
(69°F)		 21°C
(70°F)		 21°C
(70°F)		 22°C
(71°F)		 23°C
(73°F)		 24°C
(75°F)		 24°C
(76°F)		 25°C
(77°F)		 25°C
(77°F)		 24°C
(75°F)		 23°C
(74°F)		 22°C
(73°F)

Compare climate in San Jose with other places

Compare temperature, precipitation, sunshine, UV index in San Jose, Toa Baja, Puerto Rico with other places around the world.

Monthly average precipitation in San Jose, Toa Baja, Puerto Rico §

San Jose usually has the most precipitation in September, October and November, with an average of 20 rainy days and 134 mm (5.3 inches) of precipitation per month.The driest months in San Jose are January, February and December. On average, 44 mm (1.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in San Jose, Toa Baja, 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) 39 (1.5) 43 (1.7) 72 (2.8) 55 (2.2) 58 (2.3) 62 (2.4) 76 (3.0) 86 (3.4) 172 (6.8) 136 (5.3) 93 (3.7) 50 (2.0)
Average precipitation days (≥ 1 mm) 12 13 14 10 14 15 17 18 23 22 17 16

Monthly sunshine hours in San Jose, Toa Baja, Puerto Rico §

The sunniest months in San Jose are May, July and August, when the sun shines an average of 11 hours 23 minutes a day.Least sunny months in San Jose: January, February and November receive an average of 9 hours 31 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in San Jose, Toa Baja, 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 256 303 344 345 355 342 353 350 310 310 296 318
Mean daily daylight hours 11h 8m 11h 32m 12h 2m 12h 33m 12h 59m 13h 12m 13h 5m 12h 42m 12h 12m 11h 41m 11h 14m 11h 1m

Solar UV radiation in San Jose, Toa Baja, Puerto Rico §

San Jose 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 San Jose UV Index data.

Average daily maximum UV levels by month for San Jose, Toa Baja, 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 14 13 13 13 13 12 9 8