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Monthly climate in Ermioni, Greece

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Ermioni features a hot-summer Mediterranean climate (Csa). Temperatures typically range between 11 °C (52 °F) and 28 °C (83 °F) through the year, but rarely can drop to 1 °C (34 °F) or can rise to as high as 39 °C (103 °F). The average annual precipitation amounts to about 368 mm (14.5 inches) and receives 55 rainy days on the 1 mm (0.04 inches) threshold annually. Ermioni enjoys an average of 3936 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 Ermioni, Greece

The warmest months in Ermioni are July, August and September, with daily mean temperatures ranging from 25 to 28 °C (77 - 83 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 11 to 13 °C (52 - 55 °F) throughout the day. On average each year, Ermioni experiences 105 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 Ermioni. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum21°C
(70°F)		19°C
(66°F)		22°C
(72°F)		25°C
(77°F)		31°C
(87°F)		36°C
(96°F)		39°C
(103°F)		38°C
(101°F)		34°C
(93°F)		30°C
(86°F)		24°C
(76°F)		20°C
(69°F)
Mean maximum17°C
(63°F)		18°C
(64°F)		21°C
(70°F)		23°C
(73°F)		28°C
(83°F)		32°C
(90°F)		35°C
(96°F)		34°C
(94°F)		32°C
(90°F)		27°C
(80°F)		23°C
(73°F)		19°C
(66°F)
Average high13°C
(56°F)		14°C
(58°F)		15°C
(60°F)		18°C
(65°F)		23°C
(74°F)		27°C
(82°F)		31°C
(87°F)		31°C
(88°F)		28°C
(82°F)		23°C
(74°F)		19°C
(66°F)		15°C
(60°F)
Daily mean11°C
(52°F)		12°C
(54°F)		13°C
(55°F)		15°C
(60°F)		20°C
(68°F)		24°C
(76°F)		28°C
(82°F)		28°C
(83°F)		25°C
(77°F)		21°C
(69°F)		17°C
(63°F)		13°C
(56°F)
Average low9°C
(48°F)		10°C
(49°F)		10°C
(51°F)		13°C
(55°F)		17°C
(63°F)		21°C
(71°F)		25°C
(77°F)		26°C
(78°F)		23°C
(73°F)		19°C
(66°F)		15°C
(59°F)		11°C
(52°F)
Mean minimum4°C
(40°F)		6°C
(43°F)		7°C
(45°F)		9°C
(49°F)		14°C
(57°F)		18°C
(64°F)		22°C
(72°F)		23°C
(74°F)		19°C
(66°F)		15°C
(60°F)		11°C
(53°F)		7°C
(44°F)
Minimum1°C
(34°F)		3°C
(38°F)		3°C
(38°F)		8°C
(47°F)		12°C
(54°F)		15°C
(59°F)		21°C
(70°F)		22°C
(72°F)		17°C
(63°F)		13°C
(56°F)		10°C
(51°F)		6°C
(43°F)

Compare climate in Ermioni with other places

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

Monthly average precipitation in Ermioni, Greece

Ermioni usually has the most precipitation in January, February and December, with an average of 7 rainy days and 47 mm (1.8 inches) of precipitation per month. The driest months in Ermioni are May, July and August. On average, 11 mm (0.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Ermioni. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)46 (1.8)45 (1.8)33 (1.3)30 (1.2)16 (0.6)21 (0.8)8 (0.3)9 (0.3)36 (1.4)30 (1.2)45 (1.8)49 (1.9)
Average precipitation days (≥ 1 mm)864534213478

Monthly sunshine hours in Ermioni, Greece

The sunniest months in Ermioni are May, June and July, when the sun shines an average of 13 hours 21 minutes a day. Least sunny months in Ermioni: January, February and December receive an average of 7 hours 52 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ermioni. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours210255329345399408421394345314261251
Mean daily daylight hours9h 53m10h 48m11h 58m13h 10m14h 10m14h 41m14h 25m13h 31m12h 22m11h 11m10h 8m9h 36m

Solar UV radiation in Ermioni, Greece

Ermioni 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 Ermioni UV Index data.

Average daily maximum UV levels by month for Ermioni. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)3568101010108743