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December Weather in Heris, Iran

Last updated: August 23, 2025

In Heris, Iran, the average temperature in December hovers around -1°C (31°F). Expect chilly conditions, with minimum temperatures plunging to -24°C (-11°F) and peaks reaching a mild 15°C (59°F). Be prepared for 42 mm (1.7 in) of precipitation spread over 8 days, and a notable average humidity of 77%.

December Temperature in Heris

In December in Heris, the average temperature is -1°C (31°F). The maximum can reach 15°C (59°F), while the minimum can drop as low as -24°C (-11°F). Be prepared for a wide range of temperatures if you're traveling during this time.

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

The chart illustrates December temperature patterns in Heris, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Heris, December typically has an average temperature of -1°C (31°F), with highs reaching up to 15°C (59°F) and lows dropping to around -24°C (-11°F).
JanFebMarAprMayJunJulAugSepOctNovDec222839485767726964523931
Data source: Temperature data for Heris generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Heris

In Heris in December, the precipitation amount is 42 mm (1.7 in) over the course of 8 days.

December Precipitation Trends in Heris

The chart displays monthly precipitation patterns in Heris, 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 Heris, December typically receives around 42 mm (1.7 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec3156657749151189323542
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Heris

In Heris in December, humidity is 77%. With an average temperature of -1°C (31°F), this humidity feels like a heavy fog wrapping around you, making travel challenging as the cold air clings to your skin, and each breath becomes a visible puff, reminding you of the biting chill.

December Average Humidity in Heris

This chart illustrates the average monthly humidity levels in Heris, 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 Heris is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%78%76%69%68%62%59%46%59%76%79%78%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Heris

In Heris in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Heris, you can check the information here.

Maximum UV Index Levels in Heris for December

The chart shows the monthly maximum UV Index (UVI) for Heris 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 Heris typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec45109121212119743
Data source: Heris 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 Heris Compares to Other Months

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

This table compares monthly weather conditions in Heris, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)31 mm (1.2 inches)77%moderate
February Weather-2°C (28°F)56 mm (2.2 inches)78%moderate
March Weather4°C (39°F)65 mm (2.6 inches)76%very high
April Weather9°C (48°F)77 mm (3.0 inches)69%very high
May Weather14°C (57°F)49 mm (1.9 inches)68%extreme
June Weather20°C (68°F)15 mm (0.6 inches)62%extreme
July Weather22°C (72°F)11 mm (0.4 inches)59%extreme
August Weather21°C (70°F)8 mm (0.3 inches)46%extreme
September Weather18°C (64°F)9 mm (0.4 inches)59%very high
October Weather11°C (52°F)32 mm (1.3 inches)76%high
November Weather4°C (39°F)35 mm (1.4 inches)78%moderate
December Weather-1°C (31°F)42 mm (1.7 inches)77%moderate

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