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Monthly climate in Chaves, Portugal

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Chaves features a warm-summer Mediterranean climate (Csb). Temperatures typically range between 5 °C (42 °F) and 21 °C (69 °F) through the year, but rarely can drop to -5 °C (22 °F) or can rise to as high as 37 °C (99 °F). The average annual precipitation amounts to about 727 mm (28.6 inches) and receives 94 rainy days on the 1 mm (0.04 inches) threshold annually. Chaves enjoys an average of 3573 hours of sunshine throughout the year, and daylight varies from 9 hours 11 minutes to 15 hours 8 minutes per day.

Monthly average temperatures in Chaves, Portugal

The warmest months in Chaves are July, August and September, with daily mean temperatures ranging from 18 to 21 °C (65 - 69 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 5 to 8 °C (42 - 46 °F) throughout the day. On average each year, Chaves experiences 70 days above 25 °C (77.0 °F) and 21 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Chaves. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum16°C
(62°F)		20°C
(68°F)		23°C
(73°F)		25°C
(77°F)		31°C
(88°F)		35°C
(95°F)		34°C
(93°F)		37°C
(99°F)		32°C
(89°F)		29°C
(84°F)		18°C
(65°F)		16°C
(61°F)
Mean maximum14°C
(58°F)		18°C
(64°F)		20°C
(68°F)		24°C
(75°F)		28°C
(83°F)		30°C
(87°F)		32°C
(91°F)		34°C
(94°F)		30°C
(87°F)		26°C
(79°F)		18°C
(64°F)		14°C
(58°F)
Average high10°C
(50°F)		12°C
(55°F)		14°C
(57°F)		16°C
(61°F)		21°C
(70°F)		23°C
(74°F)		27°C
(81°F)		27°C
(82°F)		24°C
(76°F)		19°C
(67°F)		13°C
(55°F)		11°C
(51°F)
Daily mean5°C
(42°F)		8°C
(46°F)		9°C
(48°F)		11°C
(52°F)		15°C
(59°F)		18°C
(64°F)		21°C
(69°F)		20°C
(69°F)		18°C
(65°F)		14°C
(57°F)		9°C
(48°F)		7°C
(45°F)
Average low2°C
(36°F)		4°C
(39°F)		4°C
(40°F)		6°C
(44°F)		9°C
(49°F)		12°C
(54°F)		14°C
(58°F)		14°C
(57°F)		12°C
(54°F)		9°C
(49°F)		5°C
(42°F)		4°C
(40°F)
Mean minimum-3°C
(26°F)		-2°C
(28°F)		-1°C
(31°F)		0°C
(33°F)		3°C
(38°F)		7°C
(45°F)		9°C
(48°F)		8°C
(46°F)		7°C
(45°F)		3°C
(37°F)		0°C
(33°F)		-1°C
(31°F)
Minimum-5°C
(22°F)		-4°C
(25°F)		-3°C
(28°F)		-2°C
(29°F)		1°C
(35°F)		4°C
(40°F)		7°C
(44°F)		6°C
(44°F)		4°C
(40°F)		1°C
(35°F)		-1°C
(31°F)		-3°C
(27°F)

Compare climate in Chaves with other places

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

Monthly average precipitation in Chaves, Portugal

Chaves usually has the most precipitation in March, April and December, with an average of 11 rainy days and 98 mm (3.9 inches) of precipitation per month. The driest months in Chaves are July, August and September. On average, 22 mm (0.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Chaves. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)43 (1.7)87 (3.4)90 (3.5)90 (3.5)49 (1.9)39 (1.5)19 (0.8)15 (0.6)30 (1.2)71 (2.8)80 (3.2)114 (4.5)
Average precipitation days (≥ 1 mm)5910138734561311

Monthly sunshine hours in Chaves, Portugal

The sunniest months in Chaves are June, July and August, when the sun shines an average of 13 hours 22 minutes a day. Least sunny months in Chaves: January, February and December receive an average of 5 hours 30 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Chaves. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours145193269334395399430401345298197162
Mean daily daylight hours9h 31m10h 35m11h 57m13h 21m14h 32m15h 8m14h 49m13h 46m12h 25m11h 2m9h 49m9h 11m

Solar UV radiation in Chaves, Portugal

Chaves experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 10 - 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 Chaves UV Index data.

Average daily maximum UV levels by month for Chaves. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)246910111098642