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Monthly climate in San Juan, Philippines

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification San Juan features a tropical monsoon climate (Am). Temperatures typically range between 27 °C (81 °F) and 29 °C (85 °F) through the year, but rarely can drop to 22 °C (72 °F) or can rise to as high as 36 °C (97 °F). The average annual precipitation amounts to about 2791 mm (109.9 inches) and receives 267 rainy days on the 1 mm (0.04 inches) threshold annually. San Juan enjoys an average of 3345 hours of sunshine throughout the year, and daylight varies from 11 hours 30 minutes to 12 hours 42 minutes per day.

Monthly average temperatures in San Juan, Philippines

The warmest months in San Juan are April, May and June, with daily mean temperatures ranging from 29 to 29 °C (84 - 85 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 27 to 28 °C (81 - 82 °F) throughout the day. On average each year, San Juan 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 Juan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum33°C
(92°F)		33°C
(92°F)		35°C
(95°F)		36°C
(97°F)		35°C
(96°F)		34°C
(94°F)		33°C
(92°F)		33°C
(92°F)		34°C
(93°F)		33°C
(92°F)		33°C
(92°F)		33°C
(92°F)
Mean maximum32°C
(90°F)		33°C
(91°F)		34°C
(93°F)		34°C
(94°F)		35°C
(95°F)		33°C
(91°F)		32°C
(90°F)		32°C
(91°F)		32°C
(90°F)		32°C
(90°F)		33°C
(91°F)		33°C
(91°F)
Average high30°C
(86°F)		30°C
(87°F)		32°C
(89°F)		33°C
(91°F)		33°C
(91°F)		31°C
(88°F)		30°C
(87°F)		30°C
(87°F)		30°C
(87°F)		31°C
(87°F)		31°C
(88°F)		30°C
(87°F)
Daily mean27°C
(81°F)		27°C
(81°F)		28°C
(83°F)		29°C
(85°F)		29°C
(85°F)		29°C
(84°F)		28°C
(83°F)		28°C
(83°F)		28°C
(83°F)		28°C
(83°F)		28°C
(83°F)		28°C
(82°F)
Average low25°C
(78°F)		25°C
(77°F)		26°C
(78°F)		26°C
(79°F)		27°C
(81°F)		26°C
(80°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)
Mean minimum24°C
(76°F)		23°C
(74°F)		24°C
(76°F)		25°C
(76°F)		26°C
(79°F)		26°C
(78°F)		25°C
(78°F)		25°C
(78°F)		25°C
(77°F)		25°C
(78°F)		25°C
(77°F)		25°C
(77°F)
Minimum23°C
(74°F)		22°C
(72°F)		23°C
(74°F)		23°C
(74°F)		25°C
(78°F)		25°C
(78°F)		25°C
(77°F)		25°C
(77°F)		25°C
(76°F)		25°C
(77°F)		25°C
(77°F)		24°C
(76°F)

Compare climate in San Juan with other places

Compare temperature, precipitation, sunshine, UV index in San Juan, Philippines with other places around the world.

Monthly average precipitation in San Juan, Philippines

San Juan usually has the most precipitation in July, August and September, with an average of 29 rainy days and 376 mm (14.8 inches) of precipitation per month. The driest months in San Juan are February, March and April. On average, 85 mm (3.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in San Juan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)154 (6.1)99 (3.9)81 (3.2)76 (3.0)204 (8.0)319 (12.6)395 (15.6)364 (14.3)368 (14.5)319 (12.6)196 (7.7)216 (8.5)
Average precipitation days (≥ 1 mm)141010142829302928292422

Monthly sunshine hours in San Juan, Philippines

The sunniest months in San Juan are March, April and May, when the sun shines an average of 10 hours 11 minutes a day. Least sunny months in San Juan: January, September and October receive an average of 8 hours 14 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in San Juan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours228272313308316278276276262266268278
Mean daily daylight hours11h 34m11h 46m12h 3m12h 20m12h 35m12h 42m12h 39m12h 26m12h 9m11h 52m11h 38m11h 30m

Solar UV radiation in San Juan, Philippines

San Juan experiences the highest level of ultraviolet (UV) radiation in March, April and September, when the maximum UV index can reach values of 15 - 16, which corresponds to the Extreme category of sun exposure. January, November and December are in the Extreme exposure category. In these months, the maximum values of the UV index do not exceed 12. For more detailed information, check out our hourly San Juan UV Index data.

Average daily maximum UV levels by month for San Juan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)121416161414141415131211