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Monthly climate in Nettuno, Italy

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Nettuno features a hot-summer Mediterranean climate (Csa). Temperatures typically range between 9 °C (49 °F) and 26 °C (79 °F) through the year, but rarely can drop to -4 °C (25 °F) or can rise to as high as 32 °C (89 °F). The average annual precipitation amounts to about 1041 mm (41.0 inches) and receives 112 rainy days on the 1 mm (0.04 inches) threshold annually. Nettuno enjoys an average of 3929 hours of sunshine throughout the year, and daylight varies from 9 hours 13 minutes to 15 hours 6 minutes per day.

Monthly average temperatures in Nettuno, Italy

The warmest months in Nettuno are July, August and September, with daily mean temperatures ranging from 22 to 26 °C (73 - 79 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 9 to 11 °C (49 - 52 °F) throughout the day. On average each year, Nettuno experiences 75 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 Nettuno. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum17°C
(63°F)		18°C
(64°F)		19°C
(67°F)		24°C
(76°F)		29°C
(85°F)		30°C
(86°F)		30°C
(87°F)		32°C
(89°F)		29°C
(85°F)		25°C
(78°F)		22°C
(72°F)		18°C
(64°F)
Mean maximum15°C
(60°F)		16°C
(62°F)		18°C
(64°F)		20°C
(68°F)		25°C
(77°F)		28°C
(82°F)		30°C
(86°F)		31°C
(88°F)		28°C
(82°F)		24°C
(76°F)		20°C
(69°F)		17°C
(62°F)
Average high12°C
(54°F)		13°C
(56°F)		14°C
(58°F)		17°C
(62°F)		20°C
(68°F)		25°C
(77°F)		27°C
(82°F)		28°C
(83°F)		25°C
(77°F)		21°C
(70°F)		17°C
(63°F)		13°C
(57°F)
Daily mean9°C
(49°F)		11°C
(51°F)		11°C
(53°F)		14°C
(58°F)		18°C
(64°F)		22°C
(72°F)		25°C
(77°F)		26°C
(79°F)		22°C
(73°F)		18°C
(65°F)		15°C
(59°F)		11°C
(52°F)
Average low7°C
(45°F)		8°C
(47°F)		9°C
(48°F)		11°C
(53°F)		15°C
(60°F)		20°C
(68°F)		22°C
(72°F)		23°C
(74°F)		20°C
(68°F)		16°C
(61°F)		13°C
(55°F)		9°C
(49°F)
Mean minimum4°C
(39°F)		3°C
(38°F)		4°C
(40°F)		7°C
(45°F)		12°C
(53°F)		17°C
(62°F)		20°C
(69°F)		20°C
(68°F)		16°C
(61°F)		12°C
(54°F)		8°C
(46°F)		5°C
(42°F)
Minimum-1°C
(30°F)		-4°C
(25°F)		-2°C
(28°F)		5°C
(41°F)		8°C
(47°F)		14°C
(58°F)		20°C
(68°F)		18°C
(65°F)		13°C
(55°F)		11°C
(52°F)		5°C
(42°F)		4°C
(39°F)

Compare climate in Nettuno with other places

Compare temperature, precipitation, sunshine, UV index in Nettuno, Italy with other places around the world.

Monthly average precipitation in Nettuno, Italy

Nettuno usually has the most precipitation in October, November and December, with an average of 14 rainy days and 165 mm (6.5 inches) of precipitation per month. The driest months in Nettuno are June, July and August. On average, 23 mm (0.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Nettuno. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)83 (3.3)90 (3.5)84 (3.3)58 (2.3)67 (2.7)29 (1.2)23 (0.9)15 (0.6)96 (3.8)106 (4.2)217 (8.6)171 (6.7)
Average precipitation days (≥ 1 mm)1010109105339111715

Monthly sunshine hours in Nettuno, Italy

The sunniest months in Nettuno are May, June and July, when the sun shines an average of 13 hours 32 minutes a day. Least sunny months in Nettuno: January, November and December receive an average of 7 hours 31 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Nettuno. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours201260327355399415429398337314245244
Mean daily daylight hours9h 32m10h 36m11h 57m13h 20m14h 31m15h 6m14h 48m13h 45m12h 25m11h 3m9h 50m9h 13m

Solar UV radiation in Nettuno, Italy

Nettuno experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 10, 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 4. For more detailed information, check out our hourly Nettuno UV Index data.

Average daily maximum UV levels by month for Nettuno. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)34579101098642