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Monthly climate in Custoias, Portugal

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Custoias features a warm-summer Mediterranean climate (Csb). Temperatures typically range between 6 °C (42 °F) and 22 °C (72 °F) through the year, but rarely can drop to -5 °C (24 °F) or can rise to as high as 39 °C (102 °F). The average annual precipitation amounts to about 524 mm (20.6 inches) and receives 78 rainy days on the 1 mm (0.04 inches) threshold annually. Custoias enjoys an average of 3603 hours of sunshine throughout the year, and daylight varies from 9 hours 16 minutes to 15 hours 3 minutes per day.

Monthly average temperatures in Custoias, Portugal

The warmest months in Custoias are June, July and August, with daily mean temperatures ranging from 19 to 22 °C (67 - 72 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 6 to 9 °C (42 - 48 °F) throughout the day. On average each year, Custoias experiences 93 days above 25 °C (77.0 °F) and 22 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Custoias. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum18°C
(65°F)		21°C
(70°F)		25°C
(77°F)		26°C
(79°F)		33°C
(91°F)		37°C
(99°F)		36°C
(97°F)		39°C
(102°F)		34°C
(93°F)		31°C
(87°F)		20°C
(68°F)		16°C
(61°F)
Mean maximum16°C
(60°F)		19°C
(66°F)		22°C
(71°F)		25°C
(77°F)		30°C
(87°F)		32°C
(90°F)		34°C
(94°F)		36°C
(97°F)		32°C
(89°F)		28°C
(82°F)		19°C
(66°F)		15°C
(60°F)
Average high10°C
(51°F)		14°C
(57°F)		15°C
(59°F)		18°C
(64°F)		23°C
(73°F)		26°C
(78°F)		29°C
(85°F)		30°C
(85°F)		26°C
(79°F)		21°C
(70°F)		14°C
(57°F)		11°C
(53°F)
Daily mean6°C
(42°F)		9°C
(48°F)		10°C
(50°F)		12°C
(55°F)		17°C
(62°F)		19°C
(67°F)		22°C
(72°F)		22°C
(72°F)		19°C
(67°F)		15°C
(59°F)		10°C
(50°F)		8°C
(46°F)
Average low2°C
(36°F)		4°C
(39°F)		5°C
(41°F)		7°C
(46°F)		10°C
(51°F)		13°C
(56°F)		15°C
(60°F)		15°C
(59°F)		13°C
(56°F)		10°C
(50°F)		6°C
(43°F)		4°C
(40°F)
Mean minimum-3°C
(27°F)		-1°C
(30°F)		0°C
(33°F)		1°C
(35°F)		4°C
(39°F)		9°C
(48°F)		10°C
(50°F)		10°C
(50°F)		9°C
(48°F)		3°C
(38°F)		1°C
(33°F)		-2°C
(29°F)
Minimum-5°C
(24°F)		-3°C
(26°F)		-1°C
(30°F)		-1°C
(31°F)		2°C
(35°F)		6°C
(42°F)		8°C
(46°F)		8°C
(47°F)		7°C
(44°F)		0°C
(33°F)		-1°C
(30°F)		-4°C
(24°F)

Compare climate in Custoias with other places

Compare temperature, precipitation, sunshine, UV index in Custoias, Portugal with other places around the world.

Monthly average precipitation in Custoias, Portugal

Custoias usually has the most precipitation in April, November and December, with an average of 10 rainy days and 68 mm (2.7 inches) of precipitation per month. The driest months in Custoias are January, July and August. On average, 18 mm (0.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Custoias. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)28 (1.1)59 (2.3)64 (2.5)70 (2.7)29 (1.2)33 (1.3)14 (0.6)10 (0.4)31 (1.2)50 (2.0)65 (2.6)70 (2.8)
Average precipitation days (≥ 1 mm)57812672246109

Monthly sunshine hours in Custoias, Portugal

The sunniest months in Custoias are June, July and August, when the sun shines an average of 13 hours 26 minutes a day. Least sunny months in Custoias: January, November and December receive an average of 5 hours 35 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Custoias. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours145200272335399400432403345298199169
Mean daily daylight hours9h 35m10h 38m11h 57m13h 19m14h 28m15h 3m14h 44m13h 43m12h 25m11h 3m9h 52m9h 16m

Solar UV radiation in Custoias, Portugal

Custoias experiences the highest level of ultraviolet (UV) radiation in April, June and July, when the maximum UV index can reach values of 9 - 11, which corresponds to the Very High / Extreme category of sun exposure. January, February and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 4. For more detailed information, check out our hourly Custoias UV Index data.

Average daily maximum UV levels by month for Custoias. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)34699111098642