December Weather in Hamadan, Iran

Last updated: August 21, 2025

December in Hamadan, Iran, presents a unique blend of winter characteristics, with temperatures ranging from a brisk maximum of 15°C (59°F) to a chilly minimum of -12°C (12°F), resulting in an average temperature of 2°C (36°F). This month sees 55 mm (2.2 in) of precipitation spread over 8 days, contributing to the region's 75% humidity. The cool atmosphere and intermittent rain provide a picturesque backdrop of winter serenity, making December an intriguing time to experience the charm of Hamadan.

December Temperature in Hamadan

As December descends upon Hamadan, Iran, the temperatures take a notable dip, signaling the full embrace of winter. With a minimum temperature of -12°C (12°F) and an average hovering around 2°C (36°F), this month showcases the chilly side of Hamadan's climate. Despite the cold, daily highs can still reach a comfortable 15°C (59°F), creating a contrast that invites both cozy indoor activities and brisk outdoor explorations. December’s relatively mild maximum temperatures hint at the gradual warming trend that begins to emerge in the transitioning months ahead, while its lows firmly root the city in winter's grasp, reminding residents and visitors alike to bundle up and enjoy the unique charm this season brings.

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

The chart illustrates December temperature patterns in Hamadan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hamadan, December typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec313343526174817971574336
Data source: Temperature data for Hamadan 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 Hamadan

In December, Hamadan, Iran experiences a notable transition in precipitation patterns, with 55 mm (2.2 in) of rainfall over 8 days. This marks a decrease from the wetter months leading up to it, where December's precipitation mirrors the trend of diminishing rainfall typical as winter approaches. While November carries a heavier load at 57 mm (2.3 in) across 10 days, December's rainfall remains significant, contributing to the region's seasonal moisture. These figures underscore a consistent winter pattern where, although the precipitation begins to taper off, the month still provides a refreshing end to the fall season, paving the way for the harsher dry months ahead.

December Precipitation Trends in Hamadan

The chart displays monthly precipitation patterns in Hamadan, 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 Hamadan, December typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec45768698595221335755
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Hamadan

In December, Hamadan, Iran, experiences a humidity level of 75%, reflecting a slight increase from the preceding month. The trend throughout the year shows a consistent decline in humidity from the early summer months, where July and August register their lowest points at 46% and 36%, respectively. As the seasons shift, humidity levels begin their gradual ascent in the fall, peaking again in the winter months. Notably, December's humidity is just a fraction below January's average of 76%, suggesting that the cold months bring a return to notably damp conditions. This seasonal fluctuation creates a contrast, as residents and visitors alike can feel the shift from the dry heat of summer to the more humid winter air.

December Average Humidity in Hamadan

This chart illustrates the average monthly humidity levels in Hamadan, 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 Hamadan is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%72%73%66%62%54%46%36%40%59%70%75%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Hamadan

As December rolls into Hamadan, Iran, the UV Index begins to dip, reflecting the onset of winter with a moderate rating of 4. This decrease from the extreme levels reached in the summer months illustrates a trend of diminishing UV radiation as the year comes to a close. With a burn time of 30 minutes, residents can enjoy outdoor activities with a lower risk of sunburn during this month. While the months leading up to December showcased increasingly intense UV exposure, the milder conditions serve as a welcome relief. For ongoing updates and safety tips regarding UV exposure in Hamadan, visit Hamadan UV Index.

Maximum UV Index Levels in Hamadan for December

The chart shows the monthly maximum UV Index (UVI) for Hamadan 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 Hamadan typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec569101313121110854
Data source: Hamadan 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.

December Sunshine in Hamadan

In Hamadan, Iran, December marks a gentle transition in daylight hours, offering 271 hours of sunshine—a figure that mirrors November's light but signals the onset of winter's embrace. As the year unfurls, it's clear that the sun shines brightest in the warmer months, peaking in June with 405 hours, before gradually tapering off. While December's sunshine may not rival the summer months, it still casts a warm glow across the city, reminiscent of the long, sun-soaked days of summer. This cyclical dance of light reveals the region’s climatic patterns, where the bright and sunny days of spring swiftly ebb into a cooler, quieter winter.

Monthly Sunshine Duration in Hamadan: December Highlighted

The December sunshine duration represents the total number of hours Hamadan experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec230h266h321h346h389h405h398h384h351h324h271h271h
Data source: Hamadan December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Hamadan During December

In December, the likelihood of sunny weather in Hamadan, Iran, is 56%, marking a subtle decline as the year approaches its end. This month typically experiences a significant dip from the vibrant sunny spells of September, which boasts a remarkable 97% chance of sun. As we look back through the year, it's evident that December's sun exposure is less than the sunnier summer months like June and July, with probabilities soaring to 91% and 85%, respectively. However, December still holds a slight advantage over the preceding month of November, which drops to 52%. Thus, while December might not be the sunniest month, it does offer a respectable chance of clear skies amidst the cooler winter weather.

Percentage of Sunny Days in December in Hamadan

The chart illustrates the percentage of sunny days in Hamadan throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Hamadan experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec74%64%59%61%66%91%85%79%97%85%52%56%
Data source: Hamadan December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Hamadan in December

As winter settles in, December brings shorter days to Hamadan, Iran, with only 9 hours of daylight. This marks a notable decline from the longer days of summer, where daylight peaked at 14 hours in June and July. As the year progresses from spring through fall, the daylight duration gradually increases, reaching its zenith in the warmest months. However, as autumn fades and winter approaches, daylight begins to wane once again. This cyclical pattern underscores the region's seasonal transitions, creating a rhythmic dance of light and dark that characterizes the annual passage of time.

Average Daylight Hours in Hamadan for December

The chart illustrates the variation in daylight duration in Hamadan throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 6m10h 55m11h 58m13h 4m13h 58m14h 26m14h 12m13h 23m12h 21m11h 16m10h 19m9h 51m
Data source: Hamadan daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Hamadan

In Hamadan, Iran, December brings a gentle breath of wind, with an average speed of 2.1 m/s (5 mph). As the year draws to a close, the winds reflect a mild variability, slightly more active than the calms of November, which registered the year's lowest at 1.8 m/s. Throughout the year, wind speeds tend to range between 2.2 m/s in the winter months to a peak of 3.1 m/s in March, indicating a gradual increase as the seasons shift toward spring. Notably, the late summer and autumn months maintain a consistent breeze hovering around 2.6 m/s. This subtle shift in December signifies not just a seasonal change, but a peaceful transition, wrapping Hamadan in a cool, refreshing gust that heralds the approaching winter.

Average December Wind Speed in Hamadan

The chart displays monthly wind speed patterns in Hamadan, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.22.23.12.72.62.82.82.62.62.41.82.1 m/s
Data source: Hamadan December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Hamadan Compares to Other Months

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

In comparison to December, January typically experiences colder temperatures, with average lows dropping to -1°C (31°F) from December's average of 2°C (36°F). While both months witness similar maximum temperatures, with January peaking at 14°C (57°F) and December reaching 15°C (59°F), January is marked by a slightly lower overall precipitation of 45 mm (1.8 in) over 8 days, compared to December's 55 mm (2.2 in) on the same number of days. Additionally, humidity levels remain fairly consistent, with January at 76% and December at 75%. For more detailed insights, you can explore Hamadan weather in January.

In December, temperatures in Hamadan range from a chilly minimum of -12°C (12°F) to a more moderate maximum of 15°C (59°F), with an average temperature of 2°C (36°F). The month sees about 55 mm (2.2 in) of precipitation over 8 days, accompanied by a humidity level of 75%. In contrast, February brings even colder conditions, with a minimum temperature dropping to -19°C (-1°F) and a slight increase in the average to 1°C (34°F), while the maximum remains the same at 15°C (59°F). Precipitation in February rises to 76 mm (3.0 in) over 9 days, alongside a marginally lower humidity of 72%. For more detailed information, you can check Hamadan weather in February.

In December, temperatures in Hamadan range from a chilly -12°C (12°F) at their lowest to a mild 15°C (59°F) at their peak, with an average of around 2°C (36°F). The month experiences about 55 mm (2.2 in) of precipitation over approximately 8 days, coupled with a humidity level of 75%. In contrast, March welcomes warmer conditions, with temperature lows of -7°C (19°F) and highs reaching up to 24°C (75°F), averaging at 6°C (43°F). Precipitation increases to 86 mm (3.4 in), occurring over 13 days, while humidity remains slightly lower at 73%. For more detailed information, you can check Hamadan weather in March.

December and April present contrasting weather patterns. In December, temperatures can drop as low as -12°C (12°F), with an average of 2°C (36°F) and a maximum of 15°C (59°F). The month features around 55 mm (2.2 in) of precipitation spread over 8 days, coupled with a higher humidity level of 75%. In stark contrast, April sees a significant rise in temperatures, with lows of -4°C (26°F) and highs reaching 26°C (79°F), culminating in an average of 11°C (52°F). Additionally, April experiences increased precipitation at 98 mm (3.9 in) over 15 days, although humidity is slightly lower at 66%. For a more detailed look at weather trends in April, you can visit Hamadan weather in April.

December and May reflect stark contrasts in weather. In December, temperatures can plummet to a minimum of -12°C (12°F), with an average of just 2°C (36°F) and a maximum of 15°C (59°F). The month sees around 55 mm (2.2 in) of precipitation over about 8 days, and the humidity levels hover around 75%. In comparison, May presents a much milder climate, with minimum temperatures of 5°C (41°F) and average highs reaching up to 30°C (87°F). Although precipitation increases slightly to 59 mm (2.3 in), it extends over a longer period of about 12 days, and the humidity drops to 62%. For a detailed outlook on May's weather, visit Hamadan weather in May.

In December, the weather is typically much colder, with temperatures ranging from a minimum of -12°C (12°F) to a maximum of 15°C (59°F) and an average of 2°C (36°F). Humidity is relatively high at 75%, and precipitation occurs on about 8 days, totaling 55 mm (2.2 in). In contrast, June brings significantly warmer conditions, featuring a minimum temperature of 9°C (48°F) and soaring to a maximum of 37°C (99°F), with an average temperature of 23°C (74°F). Precipitation is minimal during June, averaging only 5 mm (0.2 in) over just 2 days, and humidity drops to 54%. For more detailed insights into June weather, you can visit Hamadan weather in June.

December and July showcase stark contrasts in weather. In December, temperatures can dip as low as -12°C (12°F), with an average around 2°C (36°F) and a maximum of 15°C (59°F). This month also sees higher humidity levels at 75% and experiences about 55 mm (2.2 in) of precipitation over 8 days. In contrast, July brings a much warmer climate, with temperatures ranging from a minimum of 14°C (58°F) to a sweltering average of 27°C (81°F), peaking at 38°C (100°F). The dry July conditions feature minimal precipitation of just 2 mm (0.1 in) across 0 days and lower humidity at 46%. For more detailed information on July weather, you can visit Hamadan weather in July.

December and August present starkly contrasting weather conditions. In December, temperatures can plunge as low as -12°C (12°F) at night, with an average high of just 15°C (59°F), while humidity remains high at 75%. The month sees approximately 55 mm (2.2 in) of precipitation spread over 8 days, creating a chilly and damp atmosphere. In contrast, August boasts a much warmer climate, with minimum temperatures of 13°C (55°F) and average highs reaching up to 37°C (99°F). The month is typically dry, recording only 2 mm (0.1 in) of precipitation over 0 days and maintaining a relative humidity of 36%. This stark difference highlights the seasonal transition from the cold, wet winter months to the hot, dry summer season. For more detailed insights, you can visit Hamadan weather in August.

December and September present distinctly different weather patterns. In December, temperatures can drop as low as -12°C (12°F), with an average of 2°C (36°F) and highs reaching 15°C (59°F). This month also sees a fair amount of precipitation, totaling 55 mm (2.2 in) across about 8 days, contributing to a humidity level of 75%. In contrast, September enjoys much milder conditions, with temperatures ranging from a minimum of 8°C (47°F) to a maximum of 35°C (95°F), and an average of 22°C (72°F). Remarkably, September is typically dry, receiving just 1 mm (0.0 in) of precipitation over zero rainy days and featuring lower humidity at 40%. For a more detailed look at the conditions during this month, check out Hamadan weather in September.

In comparison to October, December presents much colder weather, with average temperatures dropping significantly from a mild 14°C (58°F) to just 2°C (36°F). While October enjoys warmer days with maximum temperatures reaching up to 28°C (83°F), December's highest temperature peaks at 15°C (59°F). Precipitation also increases slightly in December, with 55 mm (2.2 in) expected over 8 days, compared to October’s 32 mm (1.3 in) over 6 days. Additionally, December’s humidity is higher at 75%, compared to October’s 59%, making the winter month feel chillier and more damp. For more details, check out Hamadan weather in October.

In comparing the weather between November and December, December tends to be colder with a minimum temperature of -12°C (12°F) compared to November's minimum of -6°C (22°F). The average temperature in December is also lower at 2°C (36°F) versus November's 6°C (44°F). December experiences slightly less precipitation at 55 mm (2.2 in) over 8 days, while November has 57 mm (2.3 in) across 10 days. Additionally, December has a higher humidity level at 75%, compared to November's 70%. For more detailed information on November's weather, visit Hamadan weather in November.

Compare Hamadan's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Hamadan

As December blankets Hamadan in a chillier embrace, the weather shifts significantly from milder months. With average temperatures dipping and nighttime lows reaching below freezing, this month is markedly colder and brings a crispness that fills the air. Additionally, December sees increased precipitation compared to its predecessors, contributing to a humid atmosphere that can feel quite brisk. While frost-laden mornings are a common sight, the beauty of the season is undeniable. To learn more about how December fits into the overall weather patterns, check out Hamadan Climate.