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Monthly climate in Costeni, Romania

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Costeni features a oceanic climate (Cfb). Temperatures typically range between -1 °C (30 °F) and 21 °C (70 °F) through the year, but rarely can drop to -17 °C (2 °F) or can rise to as high as 35 °C (95 °F). The average annual precipitation amounts to about 907 mm (35.7 inches) and receives 128 rainy days on the 1 mm (0.04 inches) threshold annually. Costeni enjoys an average of 3615 hours of sunshine throughout the year, and daylight varies from 8 hours 49 minutes to 15 hours 31 minutes per day.

Monthly average temperatures in Costeni, Romania

The warmest months in Costeni are June, July and August, with daily mean temperatures ranging from 19 to 21 °C (66 - 70 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -1 to 2 °C (30 - 35 °F) throughout the day. On average each year, Costeni experiences 62 days above 25 °C (77.0 °F) and 92 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Costeni. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum13°C
(56°F)		19°C
(66°F)		22°C
(72°F)		27°C
(80°F)		29°C
(84°F)		33°C
(91°F)		34°C
(93°F)		35°C
(95°F)		31°C
(88°F)		25°C
(78°F)		22°C
(72°F)		12°C
(55°F)
Mean maximum10°C
(50°F)		14°C
(58°F)		19°C
(67°F)		23°C
(73°F)		26°C
(78°F)		29°C
(85°F)		31°C
(88°F)		32°C
(91°F)		29°C
(85°F)		23°C
(74°F)		18°C
(64°F)		10°C
(51°F)
Average high3°C
(38°F)		6°C
(44°F)		11°C
(51°F)		15°C
(60°F)		20°C
(68°F)		24°C
(76°F)		26°C
(80°F)		28°C
(82°F)		23°C
(74°F)		17°C
(63°F)		9°C
(49°F)		5°C
(41°F)
Daily mean-1°C
(30°F)		2°C
(35°F)		5°C
(41°F)		10°C
(50°F)		15°C
(58°F)		19°C
(66°F)		20°C
(69°F)		21°C
(70°F)		16°C
(62°F)		11°C
(51°F)		6°C
(43°F)		2°C
(35°F)
Average low-4°C
(24°F)		-2°C
(28°F)		-0°C
(31°F)		4°C
(39°F)		9°C
(49°F)		13°C
(56°F)		14°C
(58°F)		15°C
(59°F)		10°C
(51°F)		6°C
(42°F)		3°C
(38°F)		-1°C
(30°F)
Mean minimum-13°C
(8°F)		-10°C
(15°F)		-7°C
(19°F)		-3°C
(28°F)		4°C
(39°F)		8°C
(47°F)		9°C
(48°F)		9°C
(49°F)		3°C
(38°F)		0°C
(32°F)		-2°C
(28°F)		-8°C
(18°F)
Minimum-16°C
(3°F)		-17°C
(2°F)		-16°C
(3°F)		-4°C
(25°F)		2°C
(35°F)		4°C
(40°F)		7°C
(45°F)		6°C
(43°F)		-2°C
(29°F)		-3°C
(27°F)		-5°C
(24°F)		-11°C
(12°F)

Compare climate in Costeni with other places

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

Monthly average precipitation in Costeni, Romania

Costeni usually has the most precipitation in May, November and December, with an average of 13 rainy days and 114 mm (4.5 inches) of precipitation per month. The driest months in Costeni are April, August and September. On average, 43 mm (1.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Costeni. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)65 (2.6)63 (2.5)75 (3.0)59 (2.3)126 (5.0)89 (3.5)84 (3.3)42 (1.6)27 (1.1)62 (2.5)101 (4.0)113 (4.4)
Average precipitation days (≥ 1 mm)9101291515137481412

Monthly sunshine hours in Costeni, Romania

The sunniest months in Costeni are June, July and August, when the sun shines an average of 13 hours 13 minutes a day. Least sunny months in Costeni: January, November and December receive an average of 6 hours 1 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Costeni. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours168218287342381396418401335279204180
Mean daily daylight hours9h 12m10h 24m11h 56m13h 30m14h 50m15h 31m15h 10m13h 59m12h 28m10h 55m9h 32m8h 49m

Solar UV radiation in Costeni, Romania

Costeni 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, November 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 Costeni UV Index data.

Average daily maximum UV levels by month for Costeni. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)246789987532