December Weather in Zanjan, Iran

Last updated: August 21, 2025

December in Zanjan, Iran is characterized by a cool climate, where temperatures can peak at 18°C (64°F) but often dip to a chilly -13°C (9°F) at night. The month averages around 1°C (34°F), making it essential for residents and visitors alike to bundle up. With 49 mm (1.9 in) of precipitation spread over 9 days, December can be quite damp, contributing to a humidity level of 72% that adds to the crispness of the air. Whether you're sipping hot tea indoors or enjoying the wintry landscape, Zanjan's December weather provides a unique experience rich with seasonal charm.

December Temperature in Zanjan

In December, Zanjan, Iran, experiences a noticeable chill as temperatures dip, marking the transition to winter. The minimum temperature hovers around -13°C (9°F), lending a sharp bite to the air, while the average temperature stands at 1°C (34°F), making it one of the colder months of the year. However, there’s a glimmer of warmth with daytime highs reaching 18°C (64°F), offering brief respites from the winter chill. This month distinctly showcases the swing in temperatures characteristic of Zanjan’s climate, with low averages hinting at the depth of winter before the gradual warming that follows in the spring. Such trends highlight the stark temperature contrasts as the region prepares for the colder days ahead while still providing some sunny, pleasant moments in the mix.

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

The chart illustrates December temperature patterns in Zanjan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Zanjan, 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).
JanFebMarAprMayJunJulAugSepOctNovDec283242505969726965544134
Data source: Temperature data for Zanjan 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 Zanjan

December in Zanjan, Iran, marks a notable shift in precipitation patterns, with 49 mm (1.9 in) of rain falling over approximately 9 days. This month serves as a bridge between the wetter autumn months and the drier summer season, reflecting a marked increase from the summer lows of just a few millimeters. With December’s precipitation slightly below November's 62 mm (2.5 in), it establishes a consistent wet period as the year draws to a close. Compared to the earlier months, this level of rainfall indicates a transition toward more stable winter conditions, providing a welcoming respite for the region’s dry summer months. As nature gears up for the colder season, this precipitation not only replenishes the environment but also sets the stage for the rich agricultural cycles ahead.

December Precipitation Trends in Zanjan

The chart displays monthly precipitation patterns in Zanjan, 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 Zanjan, December typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec4275699260151188376250
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Zanjan

In Zanjan, Iran, December experiences an average humidity of 72%, marking a slight decrease from the high levels seen in the winter months of January and February, both at 75%. As the year progresses from the spring into summer, humidity levels naturally decline, reaching their lowest point in August at 49%. A gradual increase follows in the fall, with October and November showing a resurgence in humidity levels, finally stabilizing at 72% in December. This trend highlights Zanjan's characteristic seasonal shifts, where winter months are notably more humid, while the summer brings a drier climate, creating a dynamic weather pattern throughout the year.

December Average Humidity in Zanjan

This chart illustrates the average monthly humidity levels in Zanjan, 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 Zanjan is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%75%72%65%65%65%61%49%58%73%75%72%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Zanjan

As December rolls into Zanjan, Iran, the UV Index settles at 4, categorizing the sun's intensity as moderate with a burn time of about 30 minutes. This marks a notable decline from the peak extremes observed in the summer months, where the UV Index soared to 13 in May. The trend clearly illustrates a seasonal shift; after the summer's powerful rays, late fall and winter provide a gentler sun exposure. Even with the moderation, it’s advisable to remain vigilant with sun protection, especially for extended outdoor activities. For further insight into the UV conditions throughout the year, visit Zanjan UV Index.

Maximum UV Index Levels in Zanjan for December

The chart shows the monthly maximum UV Index (UVI) for Zanjan 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 Zanjan typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec569101312121110754
Data source: Zanjan 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 Zanjan

In Zanjan, Iran, December experiences 261 hours of sunshine, reflecting a gentle ebb in daylight as winter sets in. As the year progresses, sunshine peaks in the warmer months, with June boasting a striking 401 hours of radiant light, offering a stark contrast to the 223 hours seen in January. The gradual increase in daylight through late spring, culminating in the sultry heights of summer, reveals a clear trend of thriving sunshine. As the seasons transition, December’s modest daylight serves as a prelude to the sun’s return, hinting at brighter days ahead as the year draws to a close. The cyclical nature of Zanjan's sunshine not only shapes the landscape but also enhances the vibrant cultural tapestry of this fascinating region.

Monthly Sunshine Duration in Zanjan: December Highlighted

The December sunshine duration represents the total number of hours Zanjan 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.
JanFebMarAprMayJunJulAugSepOctNovDec223h257h313h334h385h401h398h382h340h305h251h261h
Data source: Zanjan December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Zanjan During December

As December rolls in Zanjan, Iran, the likelihood of experiencing sunny weather stands at a promising 65%. This uptick in sunshine follows a gradual decline from the more consistently bright months of June and August, which boast figures as high as 89% and 74% respectively. Interestingly, November sees a drop to 50%, making December a refreshing shift toward brighter days. With these patterns, December offers a delightful opportunity for those seeking some sunlight amid the cooler winter months, bridging the gap between the fading autumn and the approach of winter's chill.

Percentage of Sunny Days in December in Zanjan

The chart illustrates the percentage of sunny days in Zanjan 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 Zanjan experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec62%63%54%57%54%89%68%74%76%55%50%65%
Data source: Zanjan December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Zanjan in December

In Zanjan, Iran, the daylight duration reveals a captivating rhythm throughout the year. Starting with a modest 9 hours in December, daylight begins a gradual ascent as winter yields to spring, peaking at a vibrant 14 hours from May to July. This extended daylight not only brightens the warmer months but also invigorates the landscape, creating a stark contrast to the shorter 10 hours in November and 9 hours in January. As the year progresses into autumn, daylight retreats once again, descending to 12 hours in September and back to 11 hours in October. The cyclical pattern of daylight illuminates the harmonious transition between seasons, marking the interplay of light and darkness in this region of Iran.

Average Daylight Hours in Zanjan for December

The chart illustrates the variation in daylight duration in Zanjan throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 57m10h 50m11h 58m13h 8m14h 7m14h 36m14h 21m13h 29m12h 22m11h 12m10h 12m9h 40m
Data source: Zanjan daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Zanjan

In December, Zanjan experiences a gentle breeze with an average wind speed of 2.5 m/s (6 mph), mirroring the calmness felt throughout much of the late fall months. This slight increase from November's 2.2 m/s marks a subtle shift, as the wind begins to pick up again, reminiscent of the more variable conditions seen in early spring when speeds reach around 3.5 m/s (8 mph) in March. Overall, the winds of December maintain a serene consistency, creating a tranquil atmosphere that invites reflection and warmth during the chilly Iranian winter. As the year winds down, this gentle breeze hints at the cyclical nature of Zanjan's climatic rhythm, where each month adds its unique touch to the landscape.

Average December Wind Speed in Zanjan

The chart displays monthly wind speed patterns in Zanjan, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.72.73.52.82.72.82.82.62.82.52.22.5 m/s
Data source: Zanjan December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Zanjan Compares to Other Months

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

December weather in Zanjan is generally milder than January, with average temperatures around 1°C (34°F) and maximums reaching up to 18°C (64°F). In contrast, January experiences colder conditions, with average temperatures dropping to -2°C (28°F) and minimums plunging to -24°C (-11°F). Precipitation levels are fairly close between the two months, with December seeing about 49 mm (1.9 in) over 9 days, while January has slightly less at 42 mm (1.6 in) across 7 days. Additionally, January has a slightly higher humidity level at 75% compared to December's 72%. For more detailed information, you can visit Zanjan weather in January.

December and February exhibit notable differences in weather characteristics. December experiences milder temperatures with a minimum of -13°C (9°F) and an average of 1°C (34°F), compared to February's colder minimum of -23°C (-10°F) and an average of 0°C (32°F). While both months feature similar maximum temperatures of around 17°C (64°F), February sees increased precipitation, totaling 75 mm (3.0 in) over 10 days, in contrast to December's 49 mm (1.9 in) over 9 days. Additionally, humidity levels are slightly higher in February at 75%, compared to December's 72%. For more detailed information, you can check Zanjan weather in February.

December and March exhibit notable differences in weather patterns. In December, temperatures range from a chilly minimum of -13°C (9°F) to a mild maximum of 18°C (64°F), with an average of around 1°C (34°F). This month sees about 49 mm (1.9 in) of precipitation over 9 days, while humidity remains consistently high at 72%. In contrast, March brings slightly warmer conditions with minimum temperatures of -11°C (13°F) and maximums reaching 25°C (77°F), averaging around 5°C (42°F). Precipitation increases to 69 mm (2.7 in) spread over 14 days, yet humidity remains unchanged at 72%. For more detailed information, you can check Zanjan weather in March.

December and April present distinctly different weather patterns. In December, temperatures can plummet to a minimum of -13°C (9°F) but typically hover around an average of 1°C (34°F), with a maximum of 18°C (64°F). The month sees around 49 mm (1.9 in) of precipitation over approximately 9 days, accompanied by a humidity level of 72%. In contrast, April experiences a milder climate, with temperatures ranging from a minimum of -5°C (22°F) to an average of 10°C (50°F), peaking at 28°C (82°F). Rainfall is more substantial at 92 mm (3.6 in) spread across 14 days, but the humidity is slightly lower at 65%. For more details on April weather in Zanjan, you can check this link: Zanjan weather in April.

December and May in Zanjan present two distinct weather profiles. December experiences colder temperatures, with a minimum of -13°C (9°F) and an average of 1°C (34°F), peaking at 18°C (64°F). The month is relatively humid with a humidity level of 72% and sees 49 mm (1.9 in) of precipitation over 9 days. In contrast, May offers a much milder climate, where temperatures range from a minimum of 2°C (36°F) to a maximum of 32°C (90°F), averaging around 15°C (59°F). Though it is wetter with 60 mm (2.4 in) of precipitation over 13 days, the humidity is slightly less at 65%. For a more in-depth look at the weather during this month, you can check Zanjan weather in May.

December and June present stark contrasts in weather patterns. In December, temperatures can plummet to a minimum of -13°C (9°F), with an average of 1°C (34°F) and a maximum of 18°C (64°F). This month is characterized by increased precipitation of about 49 mm (1.9 in) over 9 days, coupled with a humidity level of 72%. In contrast, June enjoys much warmer temperatures, starting from a minimum of 7°C (44°F) and rising to an average of 21°C (69°F), with highs reaching a scorching 36°C (97°F). Precipitation is significantly lower at 15 mm (0.6 in), occurring over just 4 days, and humidity drops to 65%. For more detailed information on June weather, visit Zanjan weather in June.

December and July present strikingly contrasting weather conditions. In December, temperatures can drop as low as -13°C (9°F), while averaging around 1°C (34°F) and peaking at 18°C (64°F). The month also experiences higher humidity levels at 72% and more days of precipitation, totaling 49 mm (1.9 in) over 9 days. In contrast, July boasts much warmer weather, with a minimum temperature of 8°C (47°F), an average of 22°C (73°F), and a maximum of 38°C (101°F). Additionally, this summer month sees significantly less precipitation, accumulating only 11 mm (0.4 in) across just 3 days and a lower humidity of 61%. For more insights on July weather, visit Zanjan weather in July.

December and August present dramatic contrasts in weather conditions. In December, temperatures can plunge to a minimum of -13°C (9°F) and average around 1°C (34°F), while August boasts a warm average temperature of 21°C (70°F), reaching highs of up to 36°C (97°F). Precipitation is much more frequent in December with 49 mm (1.9 in) falling over 9 days, whereas August sees significantly lower rainfall of just 8 mm (0.3 in) over 2 days. Additionally, December experiences higher humidity levels at 72%, compared to August's more comfortable 49%. For more details about August weather, check out Zanjan weather in August.

When comparing the weather in December and September, it's evident that these months offer quite different climates. December experiences a chilly average temperature of 1°C (34°F), with minimums dipping as low as -13°C (9°F) and a maximum of 18°C (64°F). In addition, December sees increased precipitation, with about 49 mm (1.9 in) falling over nine days and a higher humidity level of 72%. In contrast, September boasts a much warmer average temperature of 18°C (65°F), with minimums at 4°C (39°F) and highs reaching up to 35°C (95°F). This month has significantly less precipitation, totaling just 8 mm (0.3 in) over a day, and a lower humidity of 58%. For more detailed insights, you can check out Zanjan weather in September.

In comparing the weather of December and October, December tends to be significantly colder, with an average temperature of just 1°C (34°F), contrasting with October's more moderate average of 12°C (54°F). The minimum temperatures in December can drop to as low as -13°C (9°F), making it far chillier than October, which has a minimum of -2°C (29°F). Additionally, December experiences slightly more precipitation, totaling 49 mm (1.9 in) over 9 days, compared to October's 37 mm (1.4 in) over 7 days. Despite this, both months maintain similar humidity levels, with December at 72% and October at 73%. For more detailed information, you can check Zanjan weather in October.

In comparing the weather of December and November, December generally experiences colder temperatures, with a minimum of -13°C (9°F) and an average of 1°C (34°F), while November sees a milder minimum of -9°C (16°F) and an average of 5°C (41°F). Additionally, November boasts warmer maximum temperatures, reaching up to 22°C (73°F) compared to December's peak of 18°C (64°F). Precipitation levels are also slightly higher in November, with 62 mm (2.5 in) recorded over 11 days, compared to December's 49 mm (1.9 in) over 9 days. Humidity levels remain relatively consistent, with December at 72% and November at 75%. For more detailed insights on November weather, check Zanjan weather in November.

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Conclusion: What to Expect From December Weather in Zanjan

As December rolls into Zanjan, the weather undergoes a striking transformation. Temperatures dip significantly, creating a stark contrast to the milder conditions of previous months, with chilly nights that can plunge well below freezing. Precipitation increases, with a notable amount of rain contributing to the overall seasonal ambiance, while humidity levels remain elevated, often adding to the crispness in the air. This unique blend of cold temperatures and moisture marks December as a distinct and invigorating month, perfect for those who appreciate the serene beauty of winter. For a deeper understanding of Zanjan’s weather patterns throughout the year, visit Zanjan Climate.