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Monthly climate in Riesi, Italy

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Riesi features a hot-summer Mediterranean climate (Csa). Temperatures typically range between 9 °C (49 °F) and 27 °C (81 °F) through the year, but rarely can drop to -2 °C (29 °F) or can rise to as high as 41 °C (106 °F). The average annual precipitation amounts to about 572 mm (22.5 inches) and receives 65 rainy days on the 1 mm (0.04 inches) threshold annually. Riesi enjoys an average of 3942 hours of sunshine throughout the year, and daylight varies from 9 hours 37 minutes to 14 hours 40 minutes per day.

Monthly average temperatures in Riesi, Italy

The warmest months in Riesi are June, July and August, with daily mean temperatures ranging from 24 to 27 °C (75 - 81 °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, Riesi experiences 116 days above 25 °C (77.0 °F) and 2 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Riesi. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum20°C
(68°F)		21°C
(70°F)		22°C
(71°F)		28°C
(83°F)		33°C
(91°F)		38°C
(101°F)		39°C
(102°F)		41°C
(106°F)		33°C
(91°F)		29°C
(85°F)		24°C
(75°F)		20°C
(68°F)
Mean maximum17°C
(64°F)		19°C
(66°F)		20°C
(69°F)		26°C
(78°F)		29°C
(85°F)		34°C
(93°F)		37°C
(98°F)		38°C
(101°F)		32°C
(90°F)		28°C
(83°F)		23°C
(74°F)		19°C
(67°F)
Average high14°C
(57°F)		15°C
(60°F)		16°C
(61°F)		19°C
(67°F)		24°C
(76°F)		29°C
(85°F)		32°C
(90°F)		32°C
(91°F)		28°C
(84°F)		23°C
(74°F)		19°C
(67°F)		16°C
(60°F)
Daily mean9°C
(49°F)		10°C
(51°F)		12°C
(53°F)		15°C
(59°F)		19°C
(66°F)		24°C
(75°F)		27°C
(80°F)		27°C
(81°F)		24°C
(75°F)		19°C
(66°F)		15°C
(59°F)		11°C
(52°F)
Average low5°C
(41°F)		6°C
(42°F)		7°C
(45°F)		10°C
(50°F)		13°C
(56°F)		18°C
(64°F)		20°C
(69°F)		21°C
(70°F)		19°C
(67°F)		15°C
(59°F)		11°C
(53°F)		7°C
(45°F)
Mean minimum-0°C
(32°F)		-0°C
(32°F)		3°C
(37°F)		4°C
(40°F)		8°C
(47°F)		14°C
(57°F)		18°C
(65°F)		18°C
(65°F)		15°C
(58°F)		10°C
(50°F)		6°C
(44°F)		2°C
(35°F)
Minimum-2°C
(29°F)		-2°C
(29°F)		-1°C
(30°F)		2°C
(36°F)		6°C
(42°F)		11°C
(52°F)		17°C
(63°F)		17°C
(64°F)		12°C
(53°F)		8°C
(46°F)		3°C
(37°F)		-1°C
(30°F)

Compare climate in Riesi with other places

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

Monthly average precipitation in Riesi, Italy

Riesi usually has the most precipitation in March, October and November, with an average of 10 rainy days and 104 mm (4.1 inches) of precipitation per month. The driest months in Riesi are June, July and August. On average, 8 mm (0.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Riesi. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)41 (1.6)50 (2.0)56 (2.2)35 (1.4)28 (1.1)10 (0.4)2 (0.1)11 (0.4)36 (1.4)114 (4.5)142 (5.6)47 (1.8)
Average precipitation days (≥ 1 mm)65853201511127

Monthly sunshine hours in Riesi, Italy

The sunniest months in Riesi are May, June and July, when the sun shines an average of 13 hours 11 minutes a day. Least sunny months in Riesi: January, November and December receive an average of 8 hours 6 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Riesi. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours216271327347394400418393335306262268
Mean daily daylight hours9h 54m10h 48m11h 58m13h 10m14h 10m14h 40m14h 24m13h 31m12h 22m11h 11m10h 9m9h 37m

Solar UV radiation in Riesi, Italy

Riesi experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 10 - 11, which corresponds to the Very High / Extreme 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 Riesi UV Index data.

Average daily maximum UV levels by month for Riesi. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)356991011108743