nomadseason

December Weather in Rieni, Romania

Last updated: August 27, 2025

In December, the average temperature in Rieni, Romania hovers around 1°C (35°F). Be prepared for chilly days, with temperatures dipping as low as -17°C (2°F) and rising to a maximum of 15°C (59°F). Expect a precipitation amount of 109 mm (4.3 in) spread over 15 days, accompanied by a high average humidity of 92%.

December Temperature in Rieni

In December in Rieni, the average temperature is 1°C (35°F). The maximum can reach 15°C (59°F) and the minimum can be as low as -17°C (2°F). It's advisable to prepare for a range of temperatures when traveling during this month in Rieni.

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

The chart illustrates December temperature patterns in Rieni, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rieni, December typically has an average temperature of 1°C (35°F), with highs reaching up to 15°C (59°F) and lows dropping to around -17°C (2°F).
JanFebMarAprMayJunJulAugSepOctNovDec283539485664666859504334
Data source: Temperature data for Rieni 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 Rieni

In Rieni in December, the precipitation amount is 109 mm (4.3 in) spread over 15 days.

December Precipitation Trends in Rieni

The chart displays monthly precipitation patterns in Rieni, 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 Rieni, December typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec738374671371458460736765109
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Rieni

In Rieni in December, humidity is 92%. With an average temperature of 1°C (35°F), this humidity feels like a chilly dampness that seeps into your bones, making traveling uncomfortable and requiring extra layers to stay warm and dry.

December Average Humidity in Rieni

This chart illustrates the average monthly humidity levels in Rieni, 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 Rieni is approximately 92%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%87%83%75%72%72%71%62%68%84%90%92%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Rieni

In Rieni 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 Rieni, you can visit Hourly UV Index in Rieni.

Maximum UV Index Levels in Rieni for December

The chart shows the monthly maximum UV Index (UVI) for Rieni 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 Rieni typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689987432
Data source: Rieni 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 Rieni Compares to Other Months

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

This table compares monthly weather conditions in Rieni, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)73 mm (2.9 inches)89%low
February Weather1°C (35°F)83 mm (3.3 inches)87%moderate
March Weather4°C (40°F)74 mm (2.9 inches)83%moderate
April Weather9°C (48°F)67 mm (2.6 inches)75%high
May Weather13°C (56°F)137 mm (5.4 inches)72%very high
June Weather18°C (65°F)144 mm (5.7 inches)72%very high
July Weather19°C (67°F)84 mm (3.3 inches)71%very high
August Weather20°C (68°F)60 mm (2.4 inches)62%very high
September Weather15°C (59°F)73 mm (2.9 inches)68%high
October Weather10°C (51°F)67 mm (2.6 inches)84%moderate
November Weather6°C (43°F)65 mm (2.5 inches)90%moderate
December Weather1°C (35°F)109 mm (4.3 inches)92%low

Compare Rieni's Climate with Cities Worldwide