Last updated: February 26, 2025
Jena experiences a chilly January, where the average temperature hovers around 2°C (36°F), with maximums reaching a mild 14°C (57°F). However, temperatures can plummet to a frigid -11°C (12°F) during the coldest nights. The month is also characterized by significant precipitation, totaling 49 mm (1.9 in) across approximately 12 rainy days, contributing to the city's high humidity levels at 91%. Visitors and residents should be prepared for a mix of brisk, wintry weather and damp conditions, making it a quintessential January in Jena.
In Jena, Germany, January temperatures present a stark winter landscape, characterized by a biting minimum of -11°C (12°F) and an average hovering around 2°C (36°F). Although daytime highs can reach a balmy 14°C (57°F), the chill of the season remains palpable, marking a transition from the frigid temperatures of December. This month often sets the tone for the colder months ahead, followed closely by February's even lower minimum of -19°C (-2°F). Interestingly, as the year progresses into spring, temperatures gradually rise, hinting at the overall warming trend that follows. The gradual shift from the severe cold of January to the more temperate averages in March not only highlights Jena's dynamic climate but also offers a glimpse of the vibrant seasons to come.
In January, Jena, Germany, experiences a moderate precipitation level of 49 mm (1.9 in), spread over 12 days, marking the month as one of the wetter times of the year. Following closely, February drops slightly to 42 mm (1.7 in), with fewer precipitation days, suggesting the start of a gradual dry spell. As winter transitions to spring, March sees a notable uptick to 56 mm (2.2 in) over 15 days, indicating a return to wetter conditions. Interestingly, while April reduces to 34 mm (1.4 in), significant precipitation occurs again in May at 67 mm (2.6 in), demonstrating a distinct pattern of increased rainfall as the season progresses. This trend continues through the summer months, with July and August recording higher totals, peaking at 73 mm (2.9 in), before settling down again in the cooler months of September and October. Overall, January serves as a solid foundation for the precipitation trends throughout the year, highlighting the shift from winter dampness to the spring renewal typical of Jena's climate.
In January, Jena, Germany experiences a notably high humidity level of 91%, setting the tone for a month that feels distinctly moist and chilly. This trend of elevated humidity continues into February at 90%, before gradually decreasing to 88% in March. As spring approaches, the humidity starts to subside more significantly, with April showcasing 83% and dropping to 75% by May, bringing a refreshing change. However, summer months maintain a relatively stable humidity around 79%, illustrating a comfortable atmosphere. As the year winds down, humidity levels rise again, peaking in December at 92%. Jena's humidity trends reveal a rhythmic dance of moisture that reflects its seasonal transitions, creating an intriguing dynamic for residents and visitors alike.
In Jena, Germany, the UV Index remains relatively low during January, registering at 2 and indicating a low exposure category with a safe burn time of 45 minutes. This pattern continues into February, suggesting that residents can enjoy outdoor activities without the worry of significant sunburn. However, as spring approaches, the UV Index experiences a notable rise, reaching 4 in March and 5 in April, shifting the exposure category to moderate and reducing burn time to 30 minutes. This upward trend reflects the increasing strength of the sun as days grow longer. By May, the UV Index escalates to 7, entering the high exposure category, emphasizing the need for sun protection as burn time decreases to 25 minutes. As summer peaks in June and July, the UV Index reaches 8, classified as very high, necessitating vigilant sun safety measures due to a mere 15-minute burn time. As the year progresses into autumn, the UV Index gradually descends again, offering a brief respite before stabilizing at 2 in November and dropping to 1 in December. For all the details on Jena's UV Index trend, visit Jena UV Index.
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In Jena, Germany, the month of January greets residents with only 105 hours of sunshine, marking the start of a gradual upward trend as daylight hours increase in the following months. As winter yields to spring, February sees a significant rise to 194 hours, hinting at brighter days ahead. By March, the sun shines for an impressive 269 hours, and this surge continues through the spring months, peaking in June with 402 hours. The summer months remain generous, with July offering 411 hours—the sunniest period of the year. However, as autumn takes hold, the sunshine begins to wane, dropping to 312 hours in September and further diminishing towards winter’s return, with December closing the year with just 136 hours. This cyclical pattern highlights the region's clear seasonal changes, transitioning from the cold, short days of winter to the warmth and brightness of summer.
In Jena, Germany, the likelihood of enjoying sunny weather in January is a modest 12%, making it one of the cloudier months of the year. This trend continues with only a slight increase into February at 27%, but by March, the chances of sunshine rise significantly to 36%. Following this pattern, April and May maintain a sunny disposition with probabilities of 31% and 33% respectively. However, despite these improvements, January remains at the lower end of the spectrum, highlighting the chilly grip of winter that holds Jena firmly at the start of the year. As spring approaches, the growing likelihood of sunshine signals that brighter days are just around the corner for this charming German city.
In Jena, Germany, the January daylight duration marks the beginning of a gradual shift toward longer days, with about 8 hours of light gracing the midwinter moments. As the month transitions into February, daylight increases to 10 hours, hinting at the approaching spring. By March, residents enjoy an additional hour, soaking in 11 hours of sunshine, further brightening the mood. The trend continues, culminating in April and May, where daylight extends to 13 and 15 hours respectively, embodying the vibrant spirit of spring and early summer. However, as summer peaks in June with 16 hours of daylight, the days begin to shorten once more, leading into July, August, and September, where sunlight starts its slow decline. October sees a return to 10 hours, followed by a descent into November's 8 hours and December's waning winter light, with only 7 hours to relish. This rhythm of the seasons beautifully illustrates the natural ebb and flow of daylight throughout the year in Jena.
In January, Jena experiences a brisk average wind speed of 3.4 m/s (8 mph), setting a lively tone for the winter month. This marks the beginning of a gradual decrease in wind speeds, with February bringing a slight dip to 2.9 m/s (7 mph). As spring approaches, wind speeds hover around 3.1 to 3.2 m/s (7 mph) in the early months, suggesting a steady, though gentle, breeze that characterizes the transition into the new season. Notably, May sees an uptick to 3.7 m/s (8 mph), hinting at the arrival of warmer, more vibrant weather. However, as summer unfolds, winds calm down significantly, dropping to a mere 2.2 m/s (5 mph) in June. This trend persists into the following months, with wind speeds remaining low until a slight resurgence in October. Overall, January’s invigorating winds set the stage for a season marked by variations, inviting both exploration and respite in the charming city of Jena.
The weather in Jena changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of January's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Jena and find detailed weather information for every month.
In January, the weather features a minimum temperature of -11°C (12°F) and an average of around 2°C (36°F), with maximum temperatures reaching 14°C (57°F). This month also experiences 49 mm (1.9 in) of precipitation over about 12 days, alongside a high humidity level of 91%. In comparison, February brings slightly colder temperatures, with a minimum of -19°C (-2°F) and an average of 3°C (37°F), while highs can reach 18°C (65°F). Precipitation decreases to 42 mm (1.7 in) across 9 days, with humidity remaining comparable at 90%. For more detailed information, check out Jena weather in February.
Comparing the weather in January and March reveals notable differences in temperature and precipitation patterns. In January, temperatures range from a frigid minimum of -11°C (12°F) to a maximum of 14°C (57°F), with an average temperature of 2°C (36°F). This month experiences about 49 mm (1.9 in) of precipitation over 12 days, coupled with high humidity at 91%. In contrast, March shows a slight increase in average temperature to 5°C (41°F), with minimums dropping to -13°C (10°F) and rising to a pleasant maximum of 21°C (71°F). Precipitation also rises to 56 mm (2.2 in) over 15 days, while humidity remains relatively lower at 88%. For a more detailed look at the weather in March, you can check Jena weather in March.
In January, the weather tends to be quite chilly, with temperatures ranging from a frigid minimum of -11°C (12°F) to a maximum of 14°C (57°F), and an average temperature around 2°C (36°F). The month experiences relatively high humidity at 91% and sees precipitation on about 12 days, totaling 49 mm (1.9 in). In contrast, April brings a warmer climate, with temperatures ranging from a minimum of -6°C (21°F) to a pleasant maximum of 27°C (81°F) and an average of 9°C (48°F). The humidity is slightly lower at 83%, and April has less precipitation at 34 mm (1.4 in) over just 8 days. For more detailed insights into the weather during this month, you can check out Jena weather in April.
In January, the weather tends to be quite cold, with temperatures ranging from a minimum of -11°C (12°F) to a maximum of 14°C (57°F), and an average temperature of around 2°C (36°F). The month sees significant humidity at 91% and experiences approximately 49 mm (1.9 in) of precipitation over 12 days.
Contrastingly, May brings a milder climate, with temperatures varying from a minimum of -1°C (30°F) to a maximum of 30°C (86°F), and an average temperature of 13°C (56°F). Precipitation increases slightly to 67 mm (2.6 in) but remains consistent with 12 rainy days, and humidity drops to 75%. For a closer look at the specifics of May weather, you can explore Jena weather in May.
January and June present a striking contrast in weather conditions. In January, temperatures range from a frigid -11°C (12°F) to a mild 14°C (57°F), with an average of 2°C (36°F). The month sees considerable humidity at 91%, accompanied by 49 mm (1.9 in) of precipitation over 12 days. In contrast, June offers much warmer temperatures, ranging from a minimum of 5°C (41°F) to a sweltering maximum of 36°C (97°F), averaging 19°C (66°F). Although precipitation is slightly higher at 52 mm (2.0 in), it occurs over fewer days—just 10. The humidity also drops to a more comfortable 79%. For more detailed information, you can visit Jena weather in June.
The weather in January presents a stark contrast to that of July. In January, temperatures can drop as low as -11°C (12°F), with an average of 2°C (36°F) and a maximum of 14°C (57°F). This chilly month also sees considerable humidity at 91% and an average of 12 days of precipitation totaling 49 mm (1.9 in). In contrast, July enjoys much milder temperatures, ranging from a minimum of 7°C (46°F) to a steamy maximum of 37°C (98°F) and an average temperature of 19°C (67°F). While July experiences less precipitation over just 10 days, totaling 64 mm (2.5 in), the humidity is noticeably lower at 79%. For more information, you can check Jena weather in July.
In January, the weather is characterized by cold temperatures, with minimums dropping to -11°C (12°F) and an average of just 2°C (36°F). This month sees a fair amount of precipitation, with 49 mm (1.9 in) spread over 12 days, and a high humidity level of 91%. In contrast, August brings a significant warming trend, with temperatures ranging from a minimum of 7°C (45°F) to a maximum of 36°C (98°F) and an average temperature of 20°C (68°F). Although August experiences more precipitation at 73 mm (2.9 in) over 10 days, the humidity is notably lower at 79%. For more detailed information, check out Jena weather in August.
In January, the weather is quite cold with minimum temperatures plummeting to -11°C (12°F) and an average of only 2°C (36°F), while the maximum temperature reaches a mild 14°C (57°F). The month experiences significant humidity at 91%, accompanied by precipitation on about 12 days, totaling 49 mm (1.9 in). In contrast, September sees a much more temperate climate, with minimum temperatures around 2°C (35°F) and an average of 15°C (59°F), peaking at a warm 32°C (91°F). The precipitation remains similar at 48 mm (1.9 in), but occurs on just 7 days, and humidity decreases slightly to 83%. For more details, check out Jena weather in September.
January and October present distinct weather patterns. In January, temperatures typically range from a chilly -11°C (12°F) at night to a mild 14°C (57°F) during the day, with an average of just 2°C (36°F). This month experiences a high level of humidity at 91% and receives about 49 mm (1.9 in) of precipitation over 12 days. In contrast, October offers a more moderate climate, featuring temperatures that range from -1°C (31°F) to a pleasant 26°C (79°F), averaging 11°C (52°F). The precipitation is slightly higher at 54 mm (2.1 in) over 11 days and humidity decreases to 87%. This variation in weather makes October feel much warmer and more inviting compared to the cold grips of January. For more detailed information on weather conditions, you can check Jena weather in October.
In January, temperatures can dip as low as -11°C (12°F), with an average of 2°C (36°F) and a maximum of 14°C (57°F). The month experiences around 49 mm (1.9 in) of precipitation over 12 days and has a high humidity level of 91%. In contrast, November offers milder conditions, with temperatures ranging from a minimum of -5°C (24°F) to a maximum of 20°C (68°F), averaging at 6°C (42°F). Precipitation in November is slightly lower at 40 mm (1.6 in), occurring over 10 days, and humidity remains comparably high at 90%. For more specific details, check out Jena weather in November.
In comparing the weather of January and December, we see some intriguing similarities and differences. Both months feature a maximum temperature of 14°C (57°F), yet January typically experiences slightly milder average temperatures, with an average of 2°C (36°F) compared to December's 3°C (38°F). January also tends to have lower precipitation, measuring 49 mm (1.9 in) over about 12 days, while December sees 58 mm (2.3 in) over approximately 14 days. Additionally, humidity levels are quite comparable, with January at 91% and December slightly higher at 92%. For more detailed insights into the December weather patterns, you can check out Jena weather in December.
January in Jena brings a distinct chill compared to the milder months that follow. With average temperatures hovering around 2°C (36°F), it’s a time when the city feels the full grip of winter, often dipping to even colder lows. While precipitation is relatively moderate, the high humidity level creates an enduring dampness that can make the air feel colder than it is. Unlike the spring and summer months that are characterized by warmth and brightness, January offers a more subdued atmosphere, inviting cozy gatherings and beautiful frosty landscapes. For a more comprehensive look at what to expect throughout the year, explore Jena Climate.