nomadseason

December Weather in Riano, Italy

Last updated: August 23, 2025

In December, the average temperature in Riano, Italy hovers around 9°C (48°F). Expect chilly days with a minimum dropping to -2°C (28°F), while the maximum can reach up to 18°C (65°F). Prepare for a damp month, as precipitation totals around 135 mm (5.3 in) over approximately 13 days. Additionally, keep in mind the average humidity sits at a comfortable 77%.

December Temperature in Riano

In December in Riano, the average temperature is 9°C (48°F). The maximum can reach 18°C (65°F), while the minimum can drop to as low as -2°C (28°F). Travelers should be prepared for a range of temperatures, making layering essential for comfort during their visit.

December Weather in Riano: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Riano, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Riano, December typically has an average temperature of 9°C (48°F), with highs reaching up to 18°C (65°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec454951576574798072635548
Data source: Temperature data for Riano generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Riano

In Riano in December, the precipitation amount is 135 mm (5.3 in) over the course of 13 days.

December Precipitation Trends in Riano

The chart displays monthly precipitation patterns in Riano, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Riano, December typically receives around 135 mm (5.3 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec627881697731231710492161135
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Riano

In Riano in December, humidity is 77%. With an average temperature of 9°C (48°F), this humidity feels like a damp embrace, making traveling a bit more challenging as the cool air combines with the moisture, often leaving you with a chill that seeps into your bones.

December Average Humidity in Riano

This chart illustrates the average monthly humidity levels in Riano, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Riano is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%73%69%74%76%73%70%68%71%76%79%77%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Riano

In Riano in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Riano, you can visit Hourly UV Index in Riano.

Maximum UV Index Levels in Riano for December

The chart shows the monthly maximum UV Index (UVI) for Riano in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Riano typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34578101097542
Data source: Riano December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Riano Compares to Other Months

Weather in Riano varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Riano, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Riano, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)62 mm (2.4 inches)80%moderate
February Weather9°C (49°F)78 mm (3.1 inches)73%moderate
March Weather11°C (52°F)80 mm (3.2 inches)69%moderate
April Weather14°C (57°F)69 mm (2.7 inches)74%high
May Weather18°C (65°F)77 mm (3.0 inches)76%very high
June Weather23°C (74°F)31 mm (1.2 inches)73%very high
July Weather26°C (79°F)23 mm (0.9 inches)70%very high
August Weather27°C (80°F)17 mm (0.7 inches)68%very high
September Weather22°C (72°F)104 mm (4.1 inches)71%high
October Weather17°C (63°F)92 mm (3.6 inches)76%moderate
November Weather13°C (56°F)161 mm (6.3 inches)79%moderate
December Weather9°C (48°F)135 mm (5.3 inches)77%low

Compare Riano's Climate with Cities Worldwide