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Monthly climate in Osasco, Brazil

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Osasco features a humid subtropical climate (Cfa). Temperatures typically range between 17 °C (62 °F) and 23 °C (74 °F) through the year, but rarely can drop to 2 °C (36 °F) or can rise to as high as 37 °C (99 °F). The average annual precipitation amounts to about 1117 mm (44.0 inches) and receives 141 rainy days on the 1 mm (0.04 inches) threshold annually. Osasco enjoys an average of 3401 hours of sunshine throughout the year, and daylight varies from 10 hours 41 minutes to 13 hours 32 minutes per day.

Monthly average temperatures in Osasco, Brazil

The warmest months in Osasco are January, February and March, with daily mean temperatures ranging from 23 to 23 °C (73 - 74 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 17 to 18 °C (62 - 64 °F) throughout the day. On average each year, Osasco experiences 193 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 Osasco. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum34°C
(93°F)		35°C
(95°F)		33°C
(91°F)		31°C
(89°F)		29°C
(85°F)		28°C
(82°F)		29°C
(85°F)		32°C
(89°F)		35°C
(95°F)		37°C
(99°F)		35°C
(96°F)		34°C
(93°F)
Mean maximum32°C
(90°F)		32°C
(90°F)		32°C
(89°F)		30°C
(86°F)		28°C
(83°F)		26°C
(79°F)		28°C
(82°F)		30°C
(87°F)		34°C
(93°F)		33°C
(92°F)		32°C
(91°F)		32°C
(90°F)
Average high28°C
(82°F)		27°C
(82°F)		28°C
(82°F)		25°C
(78°F)		23°C
(75°F)		23°C
(73°F)		23°C
(74°F)		23°C
(73°F)		27°C
(81°F)		26°C
(79°F)		26°C
(78°F)		27°C
(81°F)
Daily mean23°C
(74°F)		23°C
(73°F)		23°C
(73°F)		20°C
(69°F)		18°C
(65°F)		18°C
(64°F)		17°C
(62°F)		17°C
(63°F)		20°C
(69°F)		21°C
(70°F)		21°C
(69°F)		22°C
(72°F)
Average low20°C
(68°F)		19°C
(66°F)		19°C
(67°F)		17°C
(62°F)		14°C
(58°F)		14°C
(57°F)		12°C
(54°F)		13°C
(56°F)		16°C
(60°F)		17°C
(63°F)		17°C
(62°F)		18°C
(66°F)
Mean minimum17°C
(62°F)		16°C
(61°F)		16°C
(61°F)		13°C
(55°F)		9°C
(48°F)		10°C
(51°F)		6°C
(43°F)		8°C
(47°F)		12°C
(53°F)		13°C
(55°F)		12°C
(55°F)		14°C
(58°F)
Minimum15°C
(59°F)		15°C
(59°F)		14°C
(57°F)		11°C
(52°F)		5°C
(42°F)		8°C
(47°F)		2°C
(36°F)		6°C
(42°F)		9°C
(48°F)		12°C
(53°F)		11°C
(53°F)		12°C
(54°F)

Compare climate in Osasco with other places

Compare temperature, precipitation, sunshine, UV index in Osasco, Brazil with other places around the world.

Monthly average precipitation in Osasco, Brazil

Osasco usually has the most precipitation in January, February and December, with an average of 19 rainy days and 160 mm (6.3 inches) of precipitation per month. The driest months in Osasco are June, July and September. On average, 37 mm (1.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Osasco. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)177 (7.0)158 (6.2)135 (5.3)55 (2.2)48 (1.9)45 (1.8)25 (1.0)57 (2.2)40 (1.6)118 (4.6)116 (4.6)143 (5.6)
Average precipitation days (≥ 1 mm)201716966276161521

Monthly sunshine hours in Osasco, Brazil

The sunniest months in Osasco are March, November and December, when the sun shines an average of 10 hours 1 minutes a day. Least sunny months in Osasco: January, June and August receive an average of 8 hours 23 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Osasco. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours245268309293280258292267293277295316
Mean daily daylight hours13h 23m12h 51m12h 11m11h 30m10h 57m10h 41m10h 50m11h 19m11h 57m12h 38m13h 14m13h 32m

Solar UV radiation in Osasco, Brazil

Osasco experiences the highest level of ultraviolet (UV) radiation in January, February 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 High / Very High exposure category. In these months, the maximum values of the UV index do not exceed 8. For more detailed information, check out our hourly Osasco UV Index data.

Average daily maximum UV levels by month for Osasco. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)16151211867911131415