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Monthly climate in Castelo, Brazil

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Castelo features a tropical savanna climate (Aw). Temperatures typically range between 18 °C (64 °F) and 25 °C (77 °F) through the year, but rarely can drop to 7 °C (45 °F) or can rise to as high as 36 °C (96 °F). The average annual precipitation amounts to about 1097 mm (43.2 inches) and receives 141 rainy days on the 1 mm (0.04 inches) threshold annually. Castelo enjoys an average of 3440 hours of sunshine throughout the year, and daylight varies from 10 hours 53 minutes to 13 hours 20 minutes per day.

Monthly average temperatures in Castelo, Brazil

The warmest months in Castelo are January, February and March, with daily mean temperatures ranging from 23 to 25 °C (74 - 77 °F) throughout the day. The coldest temperatures usually occur in June, July and August, when daily mean temperatures range from 18 to 19 °C (64 - 67 °F) throughout the day. On average each year, Castelo experiences 230 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 Castelo. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum35°C
(95°F)		35°C
(95°F)		33°C
(92°F)		32°C
(90°F)		30°C
(87°F)		30°C
(87°F)		30°C
(86°F)		30°C
(87°F)		35°C
(95°F)		35°C
(96°F)		36°C
(96°F)		32°C
(91°F)
Mean maximum33°C
(92°F)		32°C
(90°F)		32°C
(90°F)		31°C
(88°F)		29°C
(85°F)		29°C
(85°F)		29°C
(84°F)		29°C
(84°F)		32°C
(90°F)		33°C
(91°F)		32°C
(90°F)		31°C
(89°F)
Average high30°C
(86°F)		29°C
(84°F)		29°C
(84°F)		27°C
(81°F)		25°C
(77°F)		25°C
(77°F)		24°C
(76°F)		24°C
(75°F)		27°C
(81°F)		27°C
(81°F)		26°C
(79°F)		28°C
(82°F)
Daily mean25°C
(77°F)		24°C
(75°F)		23°C
(74°F)		22°C
(71°F)		20°C
(68°F)		19°C
(67°F)		18°C
(64°F)		18°C
(65°F)		21°C
(70°F)		22°C
(72°F)		22°C
(71°F)		23°C
(74°F)
Average low20°C
(68°F)		20°C
(68°F)		19°C
(67°F)		17°C
(64°F)		15°C
(60°F)		15°C
(59°F)		13°C
(56°F)		14°C
(57°F)		16°C
(61°F)		18°C
(65°F)		18°C
(64°F)		19°C
(67°F)
Mean minimum18°C
(64°F)		17°C
(63°F)		16°C
(61°F)		14°C
(57°F)		10°C
(51°F)		12°C
(53°F)		10°C
(49°F)		9°C
(49°F)		12°C
(53°F)		14°C
(57°F)		13°C
(56°F)		15°C
(60°F)
Minimum17°C
(63°F)		16°C
(62°F)		14°C
(57°F)		12°C
(54°F)		7°C
(45°F)		10°C
(50°F)		8°C
(47°F)		8°C
(46°F)		10°C
(51°F)		13°C
(55°F)		12°C
(54°F)		13°C
(55°F)

Compare climate in Castelo with other places

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

Monthly average precipitation in Castelo, Brazil

Castelo usually has the most precipitation in February, November and December, with an average of 17 rainy days and 173 mm (6.8 inches) of precipitation per month. The driest months in Castelo are June, July and August. On average, 25 mm (1.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Castelo. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)86 (3.4)176 (6.9)131 (5.1)76 (3.0)46 (1.8)24 (1.0)18 (0.7)33 (1.3)50 (2.0)114 (4.5)167 (6.6)175 (6.9)
Average precipitation days (≥ 1 mm)9161612106687151818

Monthly sunshine hours in Castelo, Brazil

The sunniest months in Castelo are March, July and December, when the sun shines an average of 9 hours 52 minutes a day. Least sunny months in Castelo: February, October and November receive an average of 8 hours 47 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Castelo. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours281268309297285284304280301278243303
Mean daily daylight hours13h 12m12h 45m12h 10m11h 35m11h 6m10h 53m11h 0m11h 25m11h 58m12h 34m13h 5m13h 20m

Solar UV radiation in Castelo, Brazil

Castelo experiences the highest level of ultraviolet (UV) radiation in January, 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 High / Very High exposure category. In these months, the maximum values of the UV index do not exceed 9. For more detailed information, check out our hourly Castelo UV Index data.

Average daily maximum UV levels by month for Castelo. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)161514129781012141516