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Monthly climate in Kythnos, Greece

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Kythnos features a hot-summer Mediterranean climate (Csa). Temperatures typically range between 12 °C (55 °F) and 26 °C (79 °F) through the year, but rarely can drop to 4 °C (39 °F) or can rise to as high as 30 °C (87 °F). The average annual precipitation amounts to about 384 mm (15.1 inches) and receives 50 rainy days on the 1 mm (0.04 inches) threshold annually. Kythnos enjoys an average of 3992 hours of sunshine throughout the year, and daylight varies from 9 hours 36 minutes to 14 hours 41 minutes per day.

Monthly average temperatures in Kythnos, Greece

The warmest months in Kythnos are July, August and September, with daily mean temperatures ranging from 24 to 26 °C (75 - 79 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 12 to 14 °C (55 - 57 °F) throughout the day. On average each year, Kythnos experiences 61 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 Kythnos. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum20°C
(68°F)		18°C
(64°F)		18°C
(64°F)		20°C
(69°F)		23°C
(74°F)		28°C
(82°F)		30°C
(87°F)		30°C
(86°F)		28°C
(82°F)		27°C
(80°F)		22°C
(72°F)		20°C
(69°F)
Mean maximum17°C
(62°F)		17°C
(62°F)		17°C
(63°F)		19°C
(67°F)		23°C
(73°F)		26°C
(79°F)		29°C
(84°F)		28°C
(83°F)		27°C
(81°F)		24°C
(76°F)		21°C
(70°F)		19°C
(66°F)
Average high14°C
(57°F)		14°C
(58°F)		15°C
(59°F)		16°C
(62°F)		20°C
(68°F)		23°C
(74°F)		26°C
(79°F)		27°C
(80°F)		25°C
(77°F)		21°C
(71°F)		18°C
(65°F)		16°C
(60°F)
Daily mean12°C
(55°F)		13°C
(56°F)		14°C
(57°F)		15°C
(60°F)		19°C
(66°F)		23°C
(73°F)		25°C
(78°F)		26°C
(79°F)		24°C
(75°F)		21°C
(69°F)		18°C
(64°F)		15°C
(59°F)
Average low11°C
(53°F)		12°C
(55°F)		13°C
(55°F)		15°C
(59°F)		18°C
(65°F)		22°C
(72°F)		25°C
(77°F)		25°C
(77°F)		23°C
(74°F)		20°C
(68°F)		17°C
(63°F)		14°C
(57°F)
Mean minimum6°C
(43°F)		8°C
(47°F)		9°C
(49°F)		12°C
(54°F)		16°C
(61°F)		19°C
(67°F)		23°C
(73°F)		23°C
(74°F)		20°C
(68°F)		17°C
(63°F)		14°C
(57°F)		10°C
(50°F)
Minimum4°C
(39°F)		5°C
(41°F)		5°C
(42°F)		10°C
(51°F)		15°C
(59°F)		18°C
(64°F)		22°C
(72°F)		22°C
(72°F)		19°C
(66°F)		15°C
(59°F)		12°C
(54°F)		8°C
(47°F)

Compare climate in Kythnos with other places

Compare temperature, precipitation, sunshine, UV index in Kythnos, Greece with other places around the world.

Monthly average precipitation in Kythnos, Greece

Kythnos usually has the most precipitation in January, February and December, with an average of 9 rainy days and 77 mm (3.0 inches) of precipitation per month. The driest months in Kythnos are June, July and August. On average, 2 mm (0.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Kythnos. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)86 (3.4)53 (2.1)36 (1.4)18 (0.7)8 (0.3)5 (0.2)1 (0.0)1 (0.0)10 (0.4)24 (0.9)50 (2.0)92 (3.6)
Average precipitation days (≥ 1 mm)10852210014611

Monthly sunshine hours in Kythnos, Greece

The sunniest months in Kythnos are May, June and July, when the sun shines an average of 13 hours 27 minutes a day. Least sunny months in Kythnos: January, February and December receive an average of 8 hours 0 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Kythnos. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours207263334349400412424397348324271258
Mean daily daylight hours9h 53m10h 48m11h 58m13h 10m14h 10m14h 41m14h 25m13h 31m12h 22m11h 11m10h 8m9h 36m

Solar UV radiation in Kythnos, Greece

Kythnos experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 10 - 10, which corresponds to the Very High category of sun exposure. January, February and December are in the 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 Kythnos UV Index data.

Average daily maximum UV levels by month for Kythnos. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)346891010108743