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Monthly climate in Constanta, Romania

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Constanta features a humid subtropical climate (Cfa). Temperatures typically range between 3 °C (38 °F) and 25 °C (77 °F) through the year, but rarely can drop to -10 °C (14 °F) or can rise to as high as 31 °C (87 °F). The average annual precipitation amounts to about 516 mm (20.3 inches) and receives 83 rainy days on the 1 mm (0.04 inches) threshold annually. Constanta enjoys an average of 3750 hours of sunshine throughout the year, and daylight varies from 8 hours 54 minutes to 15 hours 27 minutes per day.

Monthly average temperatures in Constanta, Romania

The warmest months in Constanta are June, July and August, with daily mean temperatures ranging from 21 to 25 °C (71 - 77 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 3 to 6 °C (38 - 43 °F) throughout the day. On average each year, Constanta experiences 54 days above 25 °C (77.0 °F) and 20 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Constanta. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum14°C
(57°F)		15°C
(59°F)		16°C
(61°F)		20°C
(69°F)		25°C
(77°F)		29°C
(84°F)		31°C
(87°F)		30°C
(87°F)		28°C
(83°F)		24°C
(76°F)		21°C
(69°F)		16°C
(61°F)
Mean maximum11°C
(52°F)		13°C
(55°F)		14°C
(58°F)		17°C
(62°F)		23°C
(73°F)		27°C
(80°F)		29°C
(85°F)		30°C
(85°F)		27°C
(81°F)		22°C
(72°F)		17°C
(64°F)		14°C
(57°F)
Average high5°C
(41°F)		7°C
(44°F)		8°C
(47°F)		12°C
(54°F)		18°C
(65°F)		23°C
(74°F)		26°C
(79°F)		27°C
(80°F)		23°C
(74°F)		18°C
(64°F)		12°C
(54°F)		8°C
(47°F)
Daily mean3°C
(38°F)		5°C
(41°F)		6°C
(43°F)		10°C
(50°F)		16°C
(61°F)		21°C
(71°F)		24°C
(75°F)		25°C
(77°F)		21°C
(70°F)		16°C
(60°F)		11°C
(51°F)		7°C
(44°F)
Average low1°C
(35°F)		3°C
(37°F)		4°C
(40°F)		8°C
(47°F)		14°C
(57°F)		19°C
(67°F)		22°C
(71°F)		22°C
(73°F)		19°C
(66°F)		14°C
(57°F)		9°C
(49°F)		5°C
(41°F)
Mean minimum-5°C
(23°F)		-3°C
(26°F)		-1°C
(31°F)		4°C
(40°F)		10°C
(51°F)		16°C
(61°F)		18°C
(65°F)		19°C
(67°F)		13°C
(55°F)		9°C
(48°F)		3°C
(38°F)		-1°C
(31°F)
Minimum-10°C
(14°F)		-6°C
(22°F)		-9°C
(17°F)		3°C
(38°F)		9°C
(49°F)		12°C
(54°F)		17°C
(62°F)		17°C
(64°F)		11°C
(52°F)		7°C
(45°F)		-1°C
(31°F)		-5°C
(24°F)

Compare climate in Constanta with other places

Compare temperature, precipitation, sunshine, UV index in Constanta, Romania with other places around the world.

Monthly average precipitation in Constanta, Romania

Constanta usually has the most precipitation in June, November and December, with an average of 10 rainy days and 63 mm (2.5 inches) of precipitation per month. The driest months in Constanta are April, August and September. On average, 20 mm (0.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Constanta. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)50 (2.0)42 (1.7)44 (1.7)28 (1.1)30 (1.2)67 (2.6)50 (2.0)11 (0.4)21 (0.8)50 (2.0)54 (2.1)68 (2.7)
Average precipitation days (≥ 1 mm)77867106335912

Monthly sunshine hours in Constanta, Romania

The sunniest months in Constanta are May, June and July, when the sun shines an average of 13 hours 41 minutes a day. Least sunny months in Constanta: January, November and December receive an average of 6 hours 9 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Constanta. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours157229301352407417433407343292214193
Mean daily daylight hours9h 16m10h 27m11h 56m13h 28m14h 47m15h 27m15h 6m13h 56m12h 28m10h 56m9h 36m8h 54m

Solar UV radiation in Constanta, Romania

Constanta experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 8 - 9, which corresponds to the Very High 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 3. For more detailed information, check out our hourly Constanta UV Index data.

Average daily maximum UV levels by month for Constanta. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)235789987532