Last updated: August 21, 2025
December in Rey, Iran, offers a unique climate experience characterized by a mild maximum temperature of 19°C (67°F), while average temperatures hover around a cool 6°C (44°F). Night-time can be quite chilly, dipping to a brisk -5°C (24°F). This month sees a moderate level of precipitation, totaling 34 mm (1.3 in) spread across approximately 7 days, contributing to a humidity level of 70% that enhances the crisp winter air. Overall, December in Rey presents a blend of cool temperatures and refreshing moisture, ideal for those who appreciate the serene beauty of winter.
As December settles in Rey, Iran, temperatures begin to reflect the chill of winter, showcasing a noticeable shift from the milder autumn months. With minimums dropping to -5°C (24°F), the cold becomes a defining feature, while average highs only reach about 19°C (67°F). This month serves as a transition point, where the averages hover around 6°C (44°F), signaling the onset of the colder season. Compared to the warmer summer months, December's temperatures starkly contrast, revealing a gradual cooling trend as the year draws to a close. It's a time when Rey's landscape transforms, inviting both locals and visitors to embrace the wintry charm.
In Rey, Iran, December experiences a notable return of precipitation, with 34 mm (1.3 in) of rain recorded over seven days. This figure mirrors January's rainfall, indicating a consistent pattern of moisture as the year draws to a close. Following the often dry summer months—where June through August see little to no rainfall—the late autumn and early winter months offer a refreshing contrast. November's 50 mm (2.0 in) set the stage for December's steady, albeit lighter, rainfall, suggesting a gradual transition from the more intense autumn showers to a milder winter pattern. As the year wraps up, the climate in Rey showcases a rhythm of wet and dry that defines its seasonal character.
In Rey, Iran, December marks a notable moment in the annual humidity cycle, with levels returning to 70%, a slight resurgence from the preceding month's 72%. Throughout the year, a clear trend emerges: humidity peaks in the cooler months, particularly from November to January, while the summer months experience a dramatic decline, dropping to a low of 40% in August. This seasonal fluctuation illustrates how humidity, intertwined with temperature changes, creates a distinct climatic rhythm, offering a refreshing transition into the winter months as Rey prepares for the colder season ahead.
In December, Rey, Iran experiences a UV Index of 3, falling into the moderate exposure category, allowing for a more comfortable outdoor experience with a burn time of about 30 minutes. This marks a notable decline from the extreme levels seen in the spring and summer months, where UV Index values surged to 13 in May and remained equally intense through June and July. As the year winds down, December ushers in a welcome respite from the harsh UV rays that dominate the earlier months, making it an excellent time for outdoor activities without the intense sun protection needed during the peak summer months. For more detailed insights into UV levels throughout the year, visit Rey UV Index.
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In Rey, Iran, December wraps up the year with a respectable 267 hours of sunshine, marking a transition from the sunnier months of summer. Following a peak in July with 394 hours, the sunlight begins to wane as the chill of winter approaches. Interestingly, this month sees more sunshine than both November and January, providing a warm respite during the coldest days of the year. As the days lengthen into spring, Rey's sunshine steadily increases, with March and April boasting over 300 hours, showcasing the region's vibrant seasonal shifts. This trend underscores Rey’s unique climate, where even in the depths of winter, sunshine remains a cherished aspect of daily life.
In December, the likelihood of sunny weather in Rey, Iran is moderately promising at 70%. This reflects a notable shift from the preceding months, especially November, which plunges to a 58% chance of sunshine. As we move further into winter, the trend indicates a consistent bounce back from the lower percentages seen earlier in the fall. Interestingly, while December enjoys a decent chance of clear skies compared to the winter months, it still lags behind the summer peaks, which boast probabilities exceeding 90%. Overall, while December might not offer the sun-drenched days characteristic of mid-year, it certainly holds its own amid the cooler months.
As the year comes to a close, December in Rey, Iran, ushers in a gentle decline in daylight, offering just 9 hours of bright sky each day. This trend marks a noticeable transition from the longer, sun-drenched days of spring and summer, where daylight reached its zenith at 14 hours from May to July. Following a gradual decrease through the fall, where daylight fluctuated between 12 to 10 hours, December stands out as the shortest month, inviting moments of reflection and coziness. The cyclical nature of daylight in Rey not only shapes daily life but also heralds the approach of the winter season, emphasizing the rhythm of nature as it gracefully shifts toward longer days once again.
As winter settles in, December winds in Rey, Iran characterize the month with a gentle breeze averaging 1.5 m/s (3 mph), mirroring the calms of January and November. This decline in wind speed contrasts with the spring and summer months, where gusts reach up to 2.5 m/s (6 mph), creating a vibrant atmosphere. Throughout the year, Rey experiences a subtle ebb and flow in wind intensity, with a noticeable peak from March to June. However, as the year winds down into December, the tranquil winds suggest a serene close to the year, perfect for cozy gatherings and reflective moments under the cool, clear skies.
Weather in Rey varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Rey, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, the weather tends to be milder, with average temperatures ranging from a minimum of -5°C (24°F) to a maximum of 19°C (67°F). The month sees about 34 mm (1.3 in) of precipitation over approximately 7 days, maintaining a humidity level of 70%. In contrast, January experiences cooler temperatures, with a minimum dipping to -12°C (11°F) and a slightly lower maximum of 16°C (61°F). Despite the chill, January also has a similar precipitation level of 34 mm (1.3 in) but over just 6 days, while humidity remains consistent at 70%. For more details about January's weather, you can explore Rey weather in January.
In December, temperatures tend to range from a chilly minimum of -5°C (24°F) to a pleasant maximum of 19°C (67°F), with an average temperature of 6°C (44°F). The month experiences 34 mm (1.3 in) of precipitation over about 7 days, contributing to a relatively humid atmosphere with humidity levels around 70%. In contrast, February brings even colder conditions, with minimum temperatures dropping to -15°C (6°F) while maintaining the same maximum of 19°C (67°F) and an average of 6°C (44°F). Precipitation increases to 53 mm (2.1 in) over 9 days, though humidity decreases slightly to 66%. For more detailed insights on the weather in February, you can visit Rey weather in February.
In December, the weather is quite chilly, with temperatures ranging from a minimum of -5°C (24°F) to a maximum of 19°C (67°F) and an average of 6°C (44°F). The precipitation is relatively low at 34 mm (1.3 inches) over about 7 days, accompanied by a humidity level of 70%. In contrast, March brings milder temperatures, with a minimum of -1°C (31°F) and a maximum of 29°C (85°F), averaging around 12°C (53°F). However, it is also wetter, with 48 mm (1.9 inches) of rain over 8 days, and humidity slightly lower at 68%. For more details on March weather, you can check Rey weather in March.
December and April present starkly contrasting weather conditions. In December, temperatures range from a chilly -5°C (24°F) at night to a mild 19°C (67°F) by day, with an average of 6°C (44°F). The month experiences precipitation on about 7 days, totaling 34 mm (1.3 in), and a humidity level of 70%, contributing to a rather crisp atmosphere. In stark contrast, April boasts significantly warmer temperatures, with lows of 2°C (37°F) and highs reaching up to 32°C (91°F), averaging 17°C (64°F). This month sees slightly more rainfall, with 50 mm (2.0 in) of precipitation over 8 days, but the humidity is lower at 62%, resulting in a more comfortable springtime feel. For detailed weather insights, you can check out Rey weather in April.
In December, the weather is characterized by cooler temperatures, with a minimum of -5°C (24°F) and an average of 6°C (44°F), peaking at 19°C (67°F). There is a notable level of precipitation, averaging 34 mm (1.3 in) over about 7 days, accompanied by a relative humidity of 70%. In contrast, May experiences much warmer weather, with temperatures ranging from a minimum of 10°C (50°F) to an average of 23°C (74°F), reaching highs of 38°C (100°F). The month sees less precipitation at 19 mm (0.7 in) over just 3 days and lower humidity levels at 64%. For more details on the weather in May, you can check Rey weather in May.
December and June present starkly contrasting weather conditions. In December, temperatures range from a chilly min of -5°C (24°F) to a mild max of 19°C (67°F), with an average of 6°C (44°F), accompanied by 34 mm (1.3 in) of precipitation over 7 days, and humidity at a notable 70%. In contrast, June experiences a significant warm-up, with temperatures soaring from a minimum of 17°C (62°F) to a sizzling maximum of 40°C (104°F), averaging around 30°C (86°F). Precipitation drops dramatically to just 2 mm (0.1 in) over 0 days, and humidity decreases to 62%. This comparison highlights the transition from the cold, wet conditions of winter to the hot, dry atmosphere of summer. For more detailed insight into the specifics of June weather, check out Rey weather in June.
December and July present starkly contrasting weather conditions. In December, temperatures range from a chilly -5°C (24°F) at night to a mild 19°C (67°F) during the day, with an average of around 6°C (44°F). This month experiences significant humidity at 70%, along with about 34 mm (1.3 in) of precipitation over seven days. In contrast, July is characterized by warm and dry conditions, with minimum temperatures of 21°C (70°F) and daytime highs soaring up to 42°C (109°F), averaging 33°C (91°F). Remarkably, July sees only 2 mm (0.1 in) of precipitation, and it's notable for having no rainy days and lower humidity at 52%. For more specifics, check Rey weather in July.
December and August present strikingly contrasting weather conditions. In December, temperatures range from a chilly -5°C (24°F) to a mild 19°C (67°F), accompanied by 34 mm (1.3 in) of precipitation over seven days and a humidity level of 70%. In stark contrast, August features much warmer temperatures, with a minimum of 20°C (67°F) and a scorching maximum of 41°C (107°F). Notably, August is dry, boasting no recorded precipitation and a lower humidity level of 40%. Such differences emphasize the seasonal extremes experienced in this region. For more detailed insights, you can explore the weather specifics here: Rey weather in August.
In December, the weather turns significantly colder, with temperatures ranging from a low of -5°C (24°F) to a mild high of 19°C (67°F), and an average temperature of 6°C (44°F). This month also experiences higher humidity at 70% and receives about 34 mm (1.3 in) of precipitation over 7 days. In contrast, September boasts much warmer weather, with temperatures soaring from a minimum of 16°C (61°F) up to a scorching maximum of 39°C (102°F), and an average of 27°C (80°F). Remarkably, September sees very little precipitation, with only 1 mm (0.0 in) recorded on no rainy days, and lower humidity at 45%. For more details on September's weather, visit Rey weather in September.
December weather is significantly colder compared to October, with temperatures ranging from a minimum of -5°C (24°F) to a maximum of 19°C (67°F). In contrast, October boasts much warmer temperatures, with a minimum of 7°C (45°F) and highs reaching up to 32°C (91°F). Additionally, while December experiences more precipitation over more days—34 mm (1.3 in) across 7 days—October's rainfall is lighter at 20 mm (0.8 in) over just 4 days. The humidity levels also vary, with December's average at 70% compared to October's 61%. For more detailed insights into the weather in October, you can visit Rey weather in October.
In comparing the weather between November and December, it's notable that December is generally colder, with average temperatures ranging from a minimum of -5°C (24°F) to a maximum of 19°C (67°F), compared to November's milder range of 0°C (32°F) to 26°C (80°F). Additionally, December sees a decrease in average temperatures, with a drop of about 5°C in average daily temperatures. Precipitation in December is slightly lower, totaling 34 mm (1.3 in) over 7 days, whereas November experiences more rain, with 50 mm (2.0 in) over the same number of days. Humidity levels remain similar in both months, with December at 70% and November slightly higher at 72%. For a detailed look at Rey's weather, you can explore Rey weather in November.
As you step into December in Rey, you'll experience a distinct shift in weather patterns compared to other months. With temperatures hovering around a mild 6°C on average and dipping to a chilling -5°C at night, the month invites cozy layers and warm beverages. Unlike the warmer months, when sunny days dominate, December's precipitation takes center stage with 34 mm of rainfall over 7 days, adding a refreshing charm to the air. The humidity level also rises to 70%, giving the atmosphere a crisp yet invigorating feel. As winter approaches, nature in Rey transforms, making this month a captivating transition into the colder season. To delve deeper into Rey's unique weather characteristics, visit Rey Climate.