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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 25 °C (78 °F) and 28 °C (83 °F) through the year, but rarely can drop to 22 °C (72 °F) or can rise to as high as 32 °C (91 °F). The average annual precipitation amounts to about 2551 mm (100.4 inches) and receives 279 rainy days on the 1 mm (0.04 inches) threshold annually. San Juan enjoys an average of 3334 hours of sunshine throughout the year, and daylight varies from 11 hours 18 minutes to 12 hours 55 minutes per day.

Monthly average temperatures in San Juan, Philippines

The warmest months in San Juan are May, June and August, with daily mean temperatures ranging from 28 to 28 °C (82 - 83 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 25 to 26 °C (78 - 79 °F) throughout the day. On average each year, San Juan 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 Juan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum29°C
(85°F)		29°C
(84°F)		30°C
(86°F)		31°C
(89°F)		32°C
(90°F)		32°C
(91°F)		31°C
(89°F)		32°C
(90°F)		32°C
(90°F)		31°C
(88°F)		30°C
(86°F)		30°C
(85°F)
Mean maximum28°C
(83°F)		28°C
(83°F)		29°C
(85°F)		30°C
(87°F)		31°C
(89°F)		31°C
(88°F)		31°C
(88°F)		31°C
(89°F)		31°C
(88°F)		31°C
(88°F)		30°C
(85°F)		29°C
(84°F)
Average high27°C
(81°F)		27°C
(80°F)		28°C
(83°F)		29°C
(84°F)		30°C
(86°F)		30°C
(86°F)		29°C
(85°F)		30°C
(85°F)		29°C
(85°F)		29°C
(84°F)		28°C
(83°F)		27°C
(82°F)
Daily mean26°C
(78°F)		25°C
(78°F)		26°C
(80°F)		27°C
(81°F)		28°C
(83°F)		28°C
(83°F)		27°C
(82°F)		28°C
(82°F)		27°C
(81°F)		27°C
(81°F)		27°C
(81°F)		26°C
(79°F)
Average low25°C
(77°F)		24°C
(76°F)		25°C
(77°F)		26°C
(78°F)		26°C
(80°F)		26°C
(80°F)		26°C
(79°F)		26°C
(79°F)		26°C
(79°F)		26°C
(78°F)		26°C
(78°F)		25°C
(78°F)
Mean minimum23°C
(74°F)		23°C
(74°F)		24°C
(76°F)		24°C
(76°F)		26°C
(78°F)		25°C
(78°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		24°C
(76°F)
Minimum23°C
(73°F)		22°C
(72°F)		23°C
(74°F)		24°C
(75°F)		25°C
(78°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		24°C
(76°F)		23°C
(74°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, September and October, with an average of 27 rainy days and 335 mm (13.2 inches) of precipitation per month. The driest months in San Juan are February, March and April. On average, 67 mm (2.6 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)109 (4.3)78 (3.1)61 (2.4)62 (2.4)174 (6.9)258 (10.2)360 (14.2)233 (9.2)320 (12.6)326 (12.8)258 (10.2)310 (12.2)
Average precipitation days (≥ 1 mm)171414192927292326282726

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 16 minutes a day. Least sunny months in San Juan: January, September and October receive an average of 8 hours 5 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 hours227270312312320295269266253263268273
Mean daily daylight hours11h 23m11h 40m12h 2m12h 25m12h 45m12h 55m12h 50m12h 33m12h 11m11h 48m11h 28m11h 18m

Solar UV radiation in San Juan, Philippines

San Juan experiences the highest level of ultraviolet (UV) radiation in March, April and August, when the maximum UV index can reach values of 15 - 15, which corresponds to the Extreme category of sun exposure. January, November and December are in the Very High / Extreme exposure category. In these months, the maximum values of the UV index do not exceed 11. 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)111315151314141514131110