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Monthly climate in San German, Puerto Rico

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification San German 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 19 °C (67 °F) or can rise to as high as 32 °C (90 °F). The average annual precipitation amounts to about 814 mm (32.0 inches) and receives 153 rainy days on the 1 mm (0.04 inches) threshold annually. San German enjoys an average of 3952 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 San German, Puerto Rico

The warmest months in San German 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 25 °C (76 - 77 °F) throughout the day. On average each year, San German experiences 329 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 German. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum29°C
(84°F)		29°C
(85°F)		28°C
(83°F)		29°C
(84°F)		30°C
(86°F)		31°C
(88°F)		31°C
(88°F)		32°C
(90°F)		32°C
(90°F)		31°C
(88°F)		31°C
(88°F)		30°C
(86°F)
Mean maximum29°C
(84°F)		28°C
(84°F)		28°C
(83°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)		30°C
(87°F)		30°C
(86°F)		29°C
(85°F)
Average high27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		28°C
(83°F)		29°C
(84°F)		29°C
(85°F)		30°C
(85°F)		29°C
(85°F)		29°C
(84°F)		28°C
(83°F)		28°C
(83°F)
Daily mean25°C
(77°F)		25°C
(77°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)		26°C
(78°F)
Average low23°C
(73°F)		23°C
(73°F)		23°C
(73°F)		23°C
(74°F)		24°C
(76°F)		25°C
(77°F)		25°C
(78°F)		26°C
(78°F)		25°C
(78°F)		25°C
(77°F)		24°C
(76°F)		23°C
(75°F)
Mean minimum21°C
(71°F)		21°C
(71°F)		21°C
(71°F)		21°C
(71°F)		23°C
(74°F)		24°C
(76°F)		24°C
(76°F)		24°C
(76°F)		25°C
(77°F)		24°C
(75°F)		23°C
(74°F)		22°C
(72°F)
Minimum19°C
(67°F)		21°C
(70°F)		21°C
(69°F)		21°C
(70°F)		23°C
(73°F)		23°C
(75°F)		24°C
(75°F)		23°C
(74°F)		24°C
(76°F)		24°C
(75°F)		23°C
(73°F)		22°C
(72°F)

Compare climate in San German with other places

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

Monthly average precipitation in San German, Puerto Rico

San German usually has the most precipitation in August, September and October, with an average of 19 rainy days and 119 mm (4.7 inches) of precipitation per month. The driest months in San German are January, February and December. On average, 23 mm (0.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in San German. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)18 (0.7)26 (1.0)49 (1.9)49 (1.9)59 (2.3)53 (2.1)86 (3.4)96 (3.8)159 (6.2)102 (4.0)91 (3.6)25 (1.0)
Average precipitation days (≥ 1 mm)451114121216162120157

Monthly sunshine hours in San German, Puerto Rico

The sunniest months in San German are May, July and August, when the sun shines an average of 11 hours 34 minutes a day. Least sunny months in San German: January, February and November receive an average of 9 hours 39 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in San German. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours262307347352362351361352317317299320
Mean daily daylight hours11h 10m11h 32m12h 2m12h 33m12h 58m13h 10m13h 4m12h 41m12h 12m11h 42m11h 16m11h 3m

Solar UV radiation in San German, Puerto Rico

San German 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 German UV Index data.

Average daily maximum UV levels by month for San German. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)911131314131313131298