Last updated: February 26, 2025
In Heilbronn, Germany, January brings a striking contrast of weather characteristics, where temperatures fluctuate from a minimum of -13°C (8°F) to a maximum of 13°C (55°F), establishing an average of 2°C (35°F). This month is marked by significant precipitation, accumulating approximately 80 mm (3.1 in) over about 12 days, contributing to a humidity level that soars to 91%. Visitors can expect a chilly and damp atmosphere, making this winter month a time for cozy indoor activities and warm clothing essentials.
In January, Heilbronn experiences a chilly embrace, with temperatures ranging from a frigid -13°C (8°F) at night to a milder 13°C (55°F) during the day. This stark contrast highlights the winter’s grip on the region, where the average temperature hovers around 2°C (35°F). As the month progresses, there’s a gradual upward trend toward spring, as February sees a slight increase in both the average temperature and maximum daytime highs. The cold nights persist, but hints of warmth begin to break through as the early stirrings of the season shift into the following months, making January a pivotal point in Heilbronn's transition from the depths of winter towards the emerging blooms of spring.
In January, Heilbronn experiences a notable precipitation amount of 80 mm (3.1 in), spread over approximately 12 rainy days. This sets the tone for winter, where the city often transitions from the wetter, chilly December, which sees the highest rainfall at 130 mm (5.1 in), to a slightly milder February, with a drop to 74 mm (2.9 in) over 11 days of precipitation. As the months progress into spring, the rainfall begins to increase again in March, reaching 91 mm (3.6 in) over 14 days. Overall, January serves as a bridge between the heavier winter months and the gradually shifting patterns of spring, showcasing the ebb and flow of precipitation that characterizes Heilbronn's climate.
In Heilbronn, Germany, January stands out with a striking humidity level of 91%, making it one of the most humid months of the year. This high humidity continues into December, where it remains at the same level, enhancing the winter chill. As the year progresses towards spring, a gradual decline is observed, with February and March experiencing humidity of 89% and 87%, respectively. By April, humidity dips to 83%, indicating a trend towards drier weather. However, as summer approaches, the humidity rises again, peaking at 84% in August, before settling into a moderate range from September to November, fluctuating between 85% and 89%. This cycle highlights Heilbronn's distinctive seasonal humidity pattern, characterized by high levels in winter and a gentle decline entering into spring.
In January, Heilbronn experiences a low UV Index of 2, indicating minimal sun exposure risk, with a burn time of about 45 minutes. As the year progresses into February, the UV Index rises to 3, transitioning into a moderate exposure category, which slightly tightens outdoor sunbathing limits to 30 minutes. The trend continues with March reaching an Index of 5, still moderate but prompting caution for prolonged exposure. The sun starts to take hold in April with a UV Index of 6, marking the onset of high exposure, where the burn time shortens to just 25 minutes. The summer months peak with values of 8 in May to July, indicating a very high exposure level and drastically reducing safe sun exposure to 15 minutes. This intensity begins to taper off in August with a UV Index of 7, remaining high, and continues through early autumn before settling back into low levels again by November and December. Overall, Heilbronn's UV Index reveals a clear upward trend from winter to summer, making it essential to monitor sun exposure as the seasons change. For more detailed information, visit Heilbronn UV Index.
UV Risk Categories
In January, Heilbronn experiences 125 hours of sunshine, marking the beginning of the year with shorter days and a crisp chill in the air. As the months progress, the light gradually increases, with February enjoying 209 hours, showcasing a promising upward trend. By March, sunshine soars to 281 hours, and this momentum continues through April, hitting 346 hours. May brings even more warmth and brightness at 383 hours, leading into the sun-drenched days of summer. The peak arrives in July, where residents bask in a delightful 412 hours of sunshine. Following this zenith, August remains robust with 383 hours, but a gradual decline begins as autumn approaches, dipping to 321 hours in September. This decrease continues into October (263 hours) and November (194 hours), before the year closes with 143 hours in December. Overall, the trend vividly illustrates Heilbronn's vibrant transition from winter's grasp to the luminous embrace of summer, only to settle into the reflective dimness of winter once more.
In Heilbronn, Germany, the likelihood of enjoying sunny weather in January is notably low, with only an 11% chance of clear skies. This trend starkly contrasts with the sunnier months that follow, particularly February, where the likelihood increases significantly to 37%, suggesting that winter’s grip begins to loosen as the year transitions. March and April further enhance this upward trend, boasting 44% and 46% chances of sunshine, respectively. Interestingly, as we move into late spring and summer, the probabilities fluctuate but generally hover in the 30-40% range, indicating that while January might seem dreary, brighter days are just around the corner as Heilbronn welcomes the increasing warmth of spring.
In Heilbronn, Germany, January marks the beginning of the year with a modest 8 hours of daylight, setting a tone of coziness during the winter months. As the seasons shift, daylight gradually increases, reaching 10 hours in February and 11 in March, hinting at the approaching spring. By April, the sun graces the skies for 13 hours, and the ascension continues, peaking at 16 hours in June, providing ample time for outdoor activities. As summer wanes, daylight begins to recede, with July still enjoying 15 hours, but by August, it dips to 14 hours. The descent continues into the fall, with September showing 12 hours, leading to a more dramatic drop in November to 9 hours, and back to 8 hours in December, where the cycle starts anew. This rhythm of daylight underscores the changing seasons, inviting residents to savor every sunlit moment.
In Heilbronn during January, the wind whispers at an average speed of 3.4 m/s (8 mph), marking a breezy start to the year. This month typically experiences the highest wind speed compared to the following months, with February and March both showing a slight drop to 2.9 m/s (6-7 mph). As spring approaches in April with an average of 2.6 m/s (6 mph), the wind begins to calm down further, hinting at a seasonal transition. Interestingly, May brings a fresh gust of 3.5 m/s (8 mph), suggesting a reawakening of blustery conditions before the summer months settle in with noticeably lighter winds below 3 m/s. This trend continues into the latter half of the year, with overall winds tapering off. By December, the averages remain mellow at 2.9 m/s (7 mph), reflecting a gentle close to the year in Heilbronn’s ever-changing, yet rhythmic, wind patterns.
The weather in Heilbronn 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 Heilbronn and find detailed weather information for every month.
In comparison to January, February offers slightly milder weather with an average temperature increase from 2°C (35°F) to 4°C (39°F). While January experiences a minimum temperature of -13°C (8°F), February has a slightly warmer low of -12°C (12°F). February also sees a higher maximum temperature, reaching up to 19°C (66°F) compared to January's maximum of 13°C (55°F). Despite February having a lower total precipitation of 74 mm (2.9 in) over 11 days and a slight drop in humidity to 89%, both months still exhibit significant winter characteristics. For more details on the weather trends during this time, visit Heilbronn weather in February.
In January, the weather is characteristically colder, with average temperatures around 2°C (35°F), ranging from a frigid minimum of -13°C (8°F) to a maximum of 13°C (55°F). The month experiences significant precipitation, totaling 80 mm (3.1 in) over about 12 days, along with high humidity levels at 91%.
In contrast, March begins to show signs of warming, with an average temperature of 6°C (43°F) and maximums reaching up to 22°C (72°F). This month has slightly higher precipitation at 91 mm (3.6 in), occurring over 14 days while humidity decreases to 87%. For more details on the transition from winter to spring, check out Heilbronn weather in March.
January and April present stark contrasts in weather patterns. In January, temperatures can plummet to a minimum of -13°C (8°F), while the average sits around a chilly 2°C (35°F) and peaks at 13°C (55°F). The month sees significant precipitation, averaging 80 mm (3.1 in) over approximately 12 days, coupled with high humidity at 91%.
In contrast, April offers a much milder climate, with minimum temperatures around -4°C (26°F), an average of 10°C (50°F), and highs reaching 27°C (80°F). Precipitation drops to 37 mm (1.5 in) spread over about 9 days, and humidity decreases to 83%. For more detailed insights, you can check out Heilbronn weather in April.
In January, temperatures in Heilbronn can be quite chilly, with a minimum of -13°C (8°F) and an average temperature of around 2°C (35°F). The month is characterized by high humidity at 91%, and precipitation occurs on about 12 days, totaling 80 mm (3.1 in). In contrast, May brings a significant warming trend, with temperatures ranging from a minimum of -1°C (30°F) to a pleasant average of 14°C (57°F), peaking at 30°C (87°F). Although May also experiences precipitation—about 85 mm (3.3 in) over 14 days—the humidity drops to a more comfortable 79%. For a more detailed look at weather conditions during this time, check out Heilbronn weather in May.
January and June offer starkly contrasting weather experiences. In January, temperatures can plummet to a minimum of -13°C (8°F) and average around 2°C (35°F), while June enjoys much milder conditions, with average temperatures soaring to 19°C (66°F) and reaching up to 34°C (94°F). Precipitation is slightly higher in June, with 85 mm (3.4 in) over 12 days, compared to January's 80 mm (3.1 in) on the same number of days. Humidity levels are also higher in January at 91%, compared to 82% in June. For more specifics on June weather, visit Heilbronn weather in June.
In January, the weather is markedly colder, with temperatures ranging from a chilly -13°C (8°F) to a maximum of 13°C (55°F) and an average of 2°C (35°F). This month experiences high humidity at 91%, along with substantial precipitation of 80 mm (3.1 in) over 12 days, creating a damp, wintry atmosphere. In contrast, July brings a significant warmth, with temperatures soaring from 7°C (45°F) at minimum to a scorching 36°C (97°F) at maximum, averaging around 20°C (68°F). Although July sees slightly less precipitation at 67 mm (2.6 in) over the same number of days, the humidity drops to a more comfortable 83%. This stark contrast highlights the seasonal extremes in weather patterns. For more specific details, you can check Heilbronn weather in July.
January and August showcase stark contrasts in weather patterns. In January, temperatures can plummet to a minimum of -13°C (8°F), with an average of only 2°C (35°F) and a maximum of 13°C (55°F). The month experiences significant humidity at 91% and sees about 80 mm (3.1 in) of precipitation over 12 days. In comparison, August boasts a much milder climate, with temperatures ranging from a minimum of 6°C (43°F) to a sweltering maximum of 35°C (95°F), averaging around 20°C (68°F). Although it receives slightly less precipitation at 65 mm (2.6 in) over 13 days, the humidity level is comparatively lower at 84%. For more detailed insights into August weather, visit Heilbronn weather in August.
In January, the weather is typically cold, with temperatures ranging from a chilly -13°C (8°F) at night to a mild 13°C (55°F) during the day, averaging around 2°C (35°F). The month experiences significant humidity at 91%, contributing to a total precipitation of 80 mm (3.1 in) over 12 days. In contrast, September brings a more temperate climate, marked by a minimum temperature of 3°C (38°F) and a maximum of 31°C (88°F), averaging 15°C (60°F). This month sees less precipitation at 51 mm (2.0 in) over 9 days and slightly lower humidity at 85%. For a closer look at the weather in September, you can check Heilbronn weather in September.
In January, the weather is typically much colder, with temperatures ranging from a minimum of -13°C (8°F) to a maximum of 13°C (55°F) and an average of 2°C (35°F). The humidity is relatively high at 91%, and the month sees around 80 mm (3.1 in) of precipitation spread over 12 days.
In contrast, October enjoys milder temperatures, with a minimum of -1°C (31°F) and a maximum of 25°C (77°F), averaging 11°C (52°F). The precipitation is slightly lower at 75 mm (3.0 in) over the same number of days, and the humidity is slightly reduced at 88%. For more detailed insights, you can check Heilbronn weather in October.
When comparing the weather in January and November, January tends to be significantly colder, with average temperatures hovering around 2°C (35°F), and dipping as low as -13°C (8°F) at night. In contrast, November has milder temperatures, ranging from a minimum of -3°C (27°F) to a comfortable maximum of 21°C (71°F). Additionally, January experiences more precipitation, with 80 mm (3.1 in) over 12 days, compared to November's 51 mm (2.0 in) over just 9 days. Humidity levels are quite similar, with January at 91% and November at 89%. For more details, you can check out Heilbronn weather in November.
In comparing the weather between January and December, January tends to be slightly colder, with average temperatures ranging from a minimum of -13°C (8°F) to a maximum of 13°C (55°F), while December experiences milder temperatures, with a minimum of -7°C (20°F) and a maximum of 14°C (57°F). Additionally, January has less precipitation, totaling 80 mm (3.1 in) over approximately 12 days compared to December's 130 mm (5.1 in) spread across 19 days. Both months exhibit high humidity levels at 91%, contributing to a damp chill in the air. For a detailed overview of December's weather, visit Heilbronn weather in December.
As January settles over Heilbronn, it brings a distinct chill that sets it apart from the milder months of the year. Characterized by its cold temperatures and high humidity, this month often feels more frigid with averages dipping significantly lower than in spring and summer. Frequent precipitation interrupts the serene winter landscape, with an average of about 12 rainy days, making it one of the wetter months. For those looking to prepare for the elements, it's essential to understand how these winter characteristics shape the overall climate experience. To explore more about the weather patterns throughout the year, visit Heilbronn Climate.