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Monthly climate in Kalymnos, Greece

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Kalymnos features a hot-summer Mediterranean climate (Csa). Temperatures typically range between 13 °C (56 °F) and 25 °C (78 °F) through the year, but rarely can drop to 5 °C (41 °F) or can rise to as high as 29 °C (85 °F). The average annual precipitation amounts to about 668 mm (26.3 inches) and receives 62 rainy days on the 1 mm (0.04 inches) threshold annually. Kalymnos enjoys an average of 4028 hours of sunshine throughout the year, and daylight varies from 9 hours 39 minutes to 14 hours 38 minutes per day.

Monthly average temperatures in Kalymnos, Greece

The warmest months in Kalymnos are July, August and September, with daily mean temperatures ranging from 24 to 25 °C (75 - 78 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 13 to 14 °C (56 - 58 °F) throughout the day. On average each year, Kalymnos 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 Kalymnos. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum19°C
(66°F)		19°C
(66°F)		18°C
(65°F)		21°C
(70°F)		24°C
(75°F)		27°C
(82°F)		29°C
(84°F)		29°C
(85°F)		28°C
(83°F)		25°C
(77°F)		23°C
(74°F)		21°C
(69°F)
Mean maximum17°C
(63°F)		17°C
(63°F)		17°C
(64°F)		19°C
(67°F)		23°C
(74°F)		26°C
(79°F)		28°C
(83°F)		28°C
(84°F)		27°C
(81°F)		24°C
(75°F)		22°C
(71°F)		19°C
(67°F)
Average high14°C
(58°F)		15°C
(59°F)		15°C
(60°F)		17°C
(63°F)		20°C
(69°F)		23°C
(75°F)		26°C
(79°F)		27°C
(80°F)		25°C
(77°F)		22°C
(72°F)		19°C
(67°F)		16°C
(62°F)
Daily mean13°C
(56°F)		14°C
(57°F)		14°C
(58°F)		16°C
(61°F)		19°C
(67°F)		23°C
(73°F)		25°C
(77°F)		25°C
(78°F)		24°C
(75°F)		21°C
(70°F)		19°C
(66°F)		15°C
(60°F)
Average low12°C
(54°F)		13°C
(56°F)		13°C
(56°F)		15°C
(60°F)		19°C
(66°F)		22°C
(72°F)		24°C
(76°F)		25°C
(77°F)		23°C
(74°F)		20°C
(69°F)		18°C
(64°F)		14°C
(58°F)
Mean minimum7°C
(44°F)		8°C
(47°F)		9°C
(48°F)		12°C
(54°F)		17°C
(62°F)		19°C
(67°F)		23°C
(73°F)		23°C
(74°F)		21°C
(70°F)		18°C
(64°F)		14°C
(57°F)		10°C
(51°F)
Minimum5°C
(42°F)		5°C
(41°F)		5°C
(41°F)		10°C
(50°F)		15°C
(60°F)		16°C
(61°F)		22°C
(71°F)		23°C
(73°F)		19°C
(66°F)		15°C
(59°F)		12°C
(53°F)		9°C
(48°F)

Compare climate in Kalymnos with other places

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

Monthly average precipitation in Kalymnos, Greece

Kalymnos usually has the most precipitation in January, February and December, with an average of 12 rainy days and 142 mm (5.6 inches) of precipitation per month. The driest months in Kalymnos are July, August and September. On average, 1 mm (0.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Kalymnos. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)150 (5.9)97 (3.8)75 (3.0)30 (1.2)4 (0.1)4 (0.1)0 (0.0)0 (0.0)4 (0.1)38 (1.5)87 (3.4)179 (7.1)
Average precipitation days (≥ 1 mm)131074010004815

Monthly sunshine hours in Kalymnos, Greece

The sunniest months in Kalymnos are May, June and July, when the sun shines an average of 13 hours 28 minutes a day. Least sunny months in Kalymnos: January, February and December receive an average of 8 hours 16 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Kalymnos. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours213271334353402412424395349325277268
Mean daily daylight hours9h 55m10h 49m11h 58m13h 9m14h 8m14h 38m14h 22m13h 30m12h 22m11h 12m10h 10m9h 39m

Solar UV radiation in Kalymnos, Greece

Kalymnos experiences the highest level of ultraviolet (UV) radiation in May, 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, November 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 Kalymnos UV Index data.

Average daily maximum UV levels by month for Kalymnos. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)3578101010108643