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Monthly climate in Porossan, Aosta Valley, Italy

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Porossan features a ice cap climate ET).Temperatures typically range between -9 °C (16 °F) and 12 °C (55 °F) through the year, but rarely can drop to -25 °C (-13 °F) or can rise to as high as 25 °C (77 °F).The average annual precipitation amounts to about 1300 mm (51.2 inches) and receives 175 rainy days on the 1 mm (0.04 inches) threshold annually.Porossan enjoys an average of 3695 hours of sunshine throughout the year, and daylight varies from 8 hours 43 minutes to 15 hours 38 minutes per day.

Monthly average temperatures in Porossan, Aosta Valley, Italy §

The warmest months in Porossan are June, July and August, with daily mean temperatures ranging from 10 to 12 °C (50 - 55 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -9 to -6 °C (16 - 22 °F) throughout the day. On average each year, Porossan experiences 0 days above 25 °C (77.0 °F) and 197 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Porossan, Aosta Valley, Italy.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 4°C
(39°F)		 8°C
(47°F)		 10°C
(50°F)		 12°C
(54°F)		 18°C
(65°F)		 25°C
(77°F)		 25°C
(76°F)		 23°C
(74°F)		 20°C
(68°F)		 15°C
(60°F)		 12°C
(54°F)		 4°C
(39°F)
Mean maximum -0°C
(32°F)		 5°C
(41°F)		 7°C
(45°F)		 10°C
(50°F)		 15°C
(60°F)		 19°C
(67°F)		 22°C
(72°F)		 23°C
(73°F)		 18°C
(65°F)		 13°C
(56°F)		 7°C
(46°F)		 2°C
(36°F)
Average high -6°C
(22°F)		 -2°C
(29°F)		 0°C
(33°F)		 4°C
(40°F)		 8°C
(48°F)		 15°C
(59°F)		 18°C
(64°F)		 17°C
(63°F)		 13°C
(56°F)		 8°C
(47°F)		 0°C
(33°F)		 -5°C
(24°F)
Daily mean -9°C
(16°F)		 -6°C
(22°F)		 -4°C
(25°F)		 0°C
(32°F)		 4°C
(40°F)		 10°C
(50°F)		 12°C
(55°F)		 12°C
(54°F)		 8°C
(47°F)		 4°C
(39°F)		 -3°C
(27°F)		 -8°C
(18°F)
Average low -13°C
(10°F)		 -10°C
(15°F)		 -8°C
(18°F)		 -4°C
(25°F)		 0°C
(32°F)		 6°C
(42°F)		 7°C
(46°F)		 7°C
(45°F)		 4°C
(39°F)		 -0°C
(32°F)		 -6°C
(21°F)		 -11°C
(12°F)
Mean minimum -22°C
(-7°F)		 -18°C
(1°F)		 -17°C
(1°F)		 -12°C
(10°F)		 -6°C
(21°F)		 0°C
(33°F)		 3°C
(38°F)		 1°C
(35°F)		 -2°C
(28°F)		 -5°C
(24°F)		 -17°C
(1°F)		 -20°C
(-4°F)
Minimum -25°C
(-13°F)		 -22°C
(-7°F)		 -25°C
(-13°F)		 -16°C
(4°F)		 -12°C
(11°F)		 -3°C
(27°F)		 1°C
(34°F)		 0°C
(33°F)		 -7°C
(20°F)		 -8°C
(17°F)		 -23°C
(-9°F)		 -23°C
(-9°F)

Compare climate in Porossan with other places

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

Monthly average precipitation in Porossan, Aosta Valley, Italy §

Porossan usually has the most precipitation in May, October and December, with an average of 16 rainy days and 144 mm (5.7 inches) of precipitation per month.The driest months in Porossan are February, April and September. On average, 76 mm (3.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Porossan, Aosta Valley, Italy.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 114 (4.5) 79 (3.1) 106 (4.2) 83 (3.3) 144 (5.7) 104 (4.1) 98 (3.9) 101 (4.0) 64 (2.5) 124 (4.9) 117 (4.6) 165 (6.5)
Average precipitation days (≥ 1 mm) 10 12 15 11 20 18 16 14 14 13 15 17

Monthly sunshine hours in Porossan, Aosta Valley, Italy §

The sunniest months in Porossan are June, July and August, when the sun shines an average of 13 hours 12 minutes a day.Least sunny months in Porossan: January, November and December receive an average of 6 hours 35 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Porossan, Aosta Valley, Italy.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 180 239 309 339 367 397 423 393 328 289 215 211
Mean daily daylight hours 9h 6m 10h 21m 11h 56m 13h 33m 14h 56m 15h 38m 15h 16m 14h 2m 12h 29m 10h 52m 9h 27m 8h 43m

Solar UV radiation in Porossan, Aosta Valley, Italy §

Porossan 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 Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Porossan UV Index data.

Average daily maximum UV levels by month for Porossan, Aosta Valley, Italy.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 3 5 8 9 10 11 11 10 8 6 3 2