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Monthly climate in San Francisco, Peru

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification San Francisco features a hot desert climate (BWh). Temperatures typically range between 18 °C (64 °F) and 21 °C (70 °F) through the year, but rarely can drop to 12 °C (54 °F) or can rise to as high as 26 °C (79 °F). The average annual precipitation amounts to about 266 mm (10.5 inches) and receives 68 rainy days on the 1 mm (0.04 inches) threshold annually. San Francisco enjoys an average of 3899 hours of sunshine throughout the year, and daylight varies from 11 hours 19 minutes to 12 hours 53 minutes per day.

Monthly average temperatures in San Francisco, Peru

The warmest months in San Francisco are January, February and March, with daily mean temperatures ranging from 20 to 21 °C (69 - 70 °F) throughout the day. The coldest temperatures usually occur in July, August and September, when daily mean temperatures range from 18 to 18 °C (64 - 64 °F) throughout the day. On average each year, San Francisco experiences 2 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 Francisco. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum25°C
(78°F)		25°C
(78°F)		26°C
(79°F)		26°C
(79°F)		24°C
(76°F)		23°C
(74°F)		23°C
(74°F)		22°C
(72°F)		23°C
(74°F)		23°C
(74°F)		23°C
(75°F)		25°C
(77°F)
Mean maximum25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		25°C
(77°F)		24°C
(75°F)		22°C
(72°F)		22°C
(72°F)		22°C
(72°F)		22°C
(73°F)		23°C
(73°F)		23°C
(74°F)		24°C
(76°F)
Average high23°C
(73°F)		23°C
(74°F)		23°C
(74°F)		23°C
(73°F)		22°C
(72°F)		21°C
(70°F)		21°C
(69°F)		21°C
(69°F)		21°C
(70°F)		21°C
(71°F)		22°C
(71°F)		23°C
(73°F)
Daily mean20°C
(69°F)		21°C
(69°F)		21°C
(70°F)		20°C
(68°F)		19°C
(66°F)		18°C
(65°F)		18°C
(64°F)		18°C
(64°F)		18°C
(64°F)		18°C
(65°F)		19°C
(66°F)		19°C
(67°F)
Average low18°C
(66°F)		19°C
(67°F)		19°C
(67°F)		18°C
(64°F)		16°C
(62°F)		16°C
(60°F)		15°C
(60°F)		15°C
(59°F)		15°C
(60°F)		16°C
(61°F)		16°C
(62°F)		17°C
(64°F)
Mean minimum17°C
(64°F)		18°C
(65°F)		18°C
(65°F)		16°C
(62°F)		15°C
(58°F)		14°C
(57°F)		14°C
(57°F)		13°C
(56°F)		14°C
(58°F)		14°C
(58°F)		15°C
(59°F)		16°C
(61°F)
Minimum17°C
(62°F)		17°C
(63°F)		17°C
(63°F)		15°C
(60°F)		14°C
(57°F)		13°C
(56°F)		13°C
(56°F)		12°C
(54°F)		14°C
(57°F)		14°C
(57°F)		14°C
(58°F)		16°C
(60°F)

Compare climate in San Francisco with other places

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

Monthly average precipitation in San Francisco, Peru

San Francisco usually has the most precipitation in January, February and March, with an average of 18 rainy days and 72 mm (2.8 inches) of precipitation per month. The driest months in San Francisco are June, July and August. On average, 1 mm (0.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in San Francisco. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)73 (2.9)84 (3.3)58 (2.3)20 (0.8)4 (0.2)1 (0.1)1 (0.0)0 (0.0)2 (0.1)5 (0.2)5 (0.2)13 (0.5)
Average precipitation days (≥ 1 mm)172117610000114

Monthly sunshine hours in San Francisco, Peru

The sunniest months in San Francisco are August, October and November, when the sun shines an average of 11 hours 20 minutes a day. Least sunny months in San Francisco: January, February and March receive an average of 9 hours 28 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in San Francisco. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours260289311321336322334342337355345342
Mean daily daylight hours12h 48m12h 30m12h 8m11h 46m11h 28m11h 19m11h 24m11h 40m12h 1m12h 23m12h 43m12h 53m

Solar UV radiation in San Francisco, Peru

San Francisco experiences the highest level of ultraviolet (UV) radiation in February, November and December, when the maximum UV index can reach values of 15 - 16, which corresponds to the Extreme category of sun exposure. May, June and July 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 Francisco UV Index data.

Average daily maximum UV levels by month for San Francisco. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)151615141110111214151615