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Monthly climate in Castro, Brazil

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Castro features a oceanic climate (Cfb). Temperatures typically range between 14 °C (57 °F) and 21 °C (70 °F) through the year, but rarely can drop to -3 °C (27 °F) or can rise to as high as 34 °C (93 °F). The average annual precipitation amounts to about 1300 mm (51.2 inches) and receives 152 rainy days on the 1 mm (0.04 inches) threshold annually. Castro enjoys an average of 3347 hours of sunshine throughout the year, and daylight varies from 10 hours 36 minutes to 13 hours 38 minutes per day.

Monthly average temperatures in Castro, Brazil

The warmest months in Castro are January, February and December, with daily mean temperatures ranging from 21 to 21 °C (69 - 70 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 14 to 15 °C (57 - 59 °F) throughout the day. On average each year, Castro experiences 128 days above 25 °C (77.0 °F) and 1 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Castro. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum31°C
(89°F)		33°C
(92°F)		30°C
(86°F)		28°C
(83°F)		27°C
(82°F)		25°C
(77°F)		26°C
(79°F)		29°C
(85°F)		31°C
(89°F)		34°C
(93°F)		31°C
(87°F)		32°C
(89°F)
Mean maximum30°C
(86°F)		31°C
(87°F)		29°C
(85°F)		27°C
(81°F)		26°C
(80°F)		23°C
(74°F)		24°C
(76°F)		28°C
(82°F)		30°C
(87°F)		30°C
(86°F)		30°C
(86°F)		30°C
(86°F)
Average high26°C
(79°F)		26°C
(79°F)		25°C
(78°F)		23°C
(74°F)		21°C
(70°F)		20°C
(67°F)		20°C
(68°F)		21°C
(69°F)		24°C
(76°F)		24°C
(75°F)		25°C
(76°F)		26°C
(79°F)
Daily mean21°C
(70°F)		21°C
(70°F)		20°C
(69°F)		18°C
(65°F)		16°C
(61°F)		15°C
(59°F)		14°C
(57°F)		15°C
(59°F)		18°C
(65°F)		19°C
(66°F)		19°C
(67°F)		21°C
(69°F)
Average low18°C
(64°F)		17°C
(63°F)		17°C
(63°F)		14°C
(57°F)		12°C
(54°F)		11°C
(53°F)		9°C
(49°F)		10°C
(51°F)		14°C
(57°F)		14°C
(58°F)		15°C
(59°F)		16°C
(62°F)
Mean minimum14°C
(58°F)		14°C
(57°F)		13°C
(56°F)		9°C
(48°F)		6°C
(42°F)		5°C
(41°F)		-0°C
(32°F)		3°C
(37°F)		9°C
(48°F)		10°C
(50°F)		10°C
(50°F)		12°C
(54°F)
Minimum13°C
(56°F)		12°C
(54°F)		12°C
(53°F)		5°C
(41°F)		3°C
(37°F)		0°C
(33°F)		-3°C
(27°F)		2°C
(35°F)		7°C
(44°F)		8°C
(47°F)		8°C
(47°F)		10°C
(51°F)

Compare climate in Castro with other places

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

Monthly average precipitation in Castro, Brazil

Castro usually has the most precipitation in January, October and December, with an average of 19 rainy days and 178 mm (7.0 inches) of precipitation per month. The driest months in Castro are April, July and September. On average, 47 mm (1.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Castro. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)193 (7.6)136 (5.3)132 (5.2)49 (1.9)74 (2.9)102 (4.0)28 (1.1)74 (2.9)65 (2.6)166 (6.5)106 (4.2)176 (6.9)
Average precipitation days (≥ 1 mm)211821799376171519

Monthly sunshine hours in Castro, Brazil

The sunniest months in Castro are March, November and December, when the sun shines an average of 10 hours 10 minutes a day. Least sunny months in Castro: January, May and June receive an average of 7 hours 57 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Castro. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours233281304278262236295269292262307324
Mean daily daylight hours13h 27m12h 54m12h 11m11h 28m10h 53m10h 36m10h 45m11h 16m11h 57m12h 40m13h 18m13h 38m

Solar UV radiation in Castro, Brazil

Castro experiences the highest level of ultraviolet (UV) radiation in January, February and December, when the maximum UV index can reach values of 16 - 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 Castro UV Index data.

Average daily maximum UV levels by month for Castro. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)16161311867911141516