April Weather in Koeln, Germany

Last updated: February 26, 2025

April in Cologne, Germany is marked by a dynamic range of temperatures, where highs can soar up to 27°C (81°F), while the average settles at a crisp 10°C (51°F), dropping as low as -3°C (26°F) on cooler nights. This month experiences approximately 38 mm (1.5 in) of rainfall spread over 9 days, contributing to a humid environment with levels reaching 84%. As spring approaches, residents and visitors alike can expect a mix of brisk, refreshing air and intermittent showers, making it a picturesque time to explore the beauty of Cologne.

April Temperature in Koeln

In April, temperatures in Köln, Germany begin to showcase the lively emergence of spring, transitioning from the lingering chills of winter. The month kicks off with minima around -3°C (26°F), gradually rising to an average of 10°C (51°F), creating a refreshing atmosphere for outdoor activities. The afternoons can be pleasantly warm, with maximum temperatures peaking at 27°C (81°F), making it the perfect time to enjoy the blooming landscapes. Compared to the cooler months preceding it, April signals a significant shift, inviting locals and visitors alike to embrace longer, sunnier days and a vibrant city that awakens from its winter slumber.

April Weather in Koeln: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Koeln, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec384145505766676760544541
Data source: Temperature data for Koeln 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.

April Precipitation in Koeln

In April, Koeln experiences a notable decline in precipitation, with only 38 mm (1.5 in) of rain over 9 days. This marked reduction follows the wetter months of January to March, each averaging around 91 mm, and significantly contrasts with the 127 mm typical in December. The transition into spring often brings a welcome respite from the heavier rain, hinting at the approaching sunnier weather of late spring and summer. As April progresses, the city starts to shake off the grip of winter rain, paving the way for the blossoming landscapes that characterize the season.

April Precipitation Trends in Koeln

The chart displays monthly precipitation patterns in Koeln, with values for each month alongside April's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec9186913866609778659767127
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Koeln

In April, Koeln experiences a notable shift in humidity, with levels dropping to 84% from the higher figures seen in the winter months. This decline marks a continued trend of decreasing humidity that begins in March, reflecting the gradual transition into milder spring weather. As temperatures rise and the likelihood of rain decreases, April's humidity is significantly lower than the frosty highs of 91% in January and 90% in February. Looking ahead, humidity levels are expected to further decrease towards 77% by May, signaling a more comfortable and drier climate as summer approaches. This month is pivotal, as it bridges the cool, damp winter months and the warm, vibrant summer season, effectively highlighting the dynamic climate of Koeln.

April Average Humidity in Koeln

This chart illustrates the average monthly humidity levels in Koeln, with April's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how April's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec91%90%87%84%77%74%72%71%81%88%91%92%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Koeln

As spring unfolds in Koeln, Germany, April's UV Index reaches a moderate level of 5, indicating a gradual increase in the sun's intensity compared to the previous months. With a burn time of just 30 minutes, this month signals a shift from the low exposure categories of winter to more watchful sun safety practices as the sun grows stronger. This upward trend will continue into May, where the index jumps to a high 7, further highlighting the importance of protecting your skin as the seasons transition. As you enjoy the blooming landscapes, be sure to stay informed about the UV levels by checking Koeln UV Index and adjust your sun protection accordingly.

Maximum UV Index Levels in Koeln for April

The chart shows the monthly maximum UV Index (UVI) for Koeln in April, 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.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Koeln April 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.

April Sunshine in Koeln

In Koeln, Germany, April heralds a delightful shift in the seasons, as the hours of sunshine soar to an impressive 336 hours. This increase showcases a vibrant trend, where the city shakes off the winter chill and welcomes the warmth of spring. Following a steady climb from 267 hours in March, the sunlight continues to strengthen, setting the stage for the even sunnier months ahead. The gradual rise in sunny days from January’s mere 113 hours to April’s abundance reflects both nature’s awakening and the local spirit, inviting residents and visitors alike to bask in the longer, brighter days. As spring transitions into summer, April serves as a beautiful prelude, suggesting brighter times are just around the corner.

Monthly Sunshine Duration in Koeln: April Highlighted

The April sunshine duration represents the total number of hours Koeln experiences direct sunlight during the month of April, excluding cloudy or obstructed periods. This chart compares the sunshine duration of April with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec113h202h267h336h387h383h405h377h313h232h183h129h
Data source: Koeln April Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Koeln During April

As April arrives in Köln, Germany, the likelihood of sunny weather begins to wane slightly, with a 38% chance of sunshine. This marks a decline from March's 41%, suggesting that while spring is starting to blossom, the clouds can still linger. Interestingly, this period serves as a transitional phase; after a promising start to the year where February and March offered a notable increase in sun exposure, April’s weather tendencies remind us that sunshine can be quite variable. As we look ahead toward May and the summer months, the sun's presence becomes less reliable, reflecting a broader trend of fluctuating weather as the seasons change.

Percentage of Sunny Days in April in Koeln

The chart illustrates the percentage of sunny days in Koeln throughout the year, with April 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 Koeln experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec9%32%41%38%29%31%31%33%36%28%23%13%
Data source: Koeln April chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Koeln in April

As spring unfolds in Koeln, Germany, April bathes the city in approximately 13 hours of daylight, a significant increase from the 11 hours seen in March. This upward trend marks a delightful transition from the shorter, darker days of winter, gradually building momentum towards summer's peak in June, when residents can enjoy an impressive 16 hours of sunlight. The progression from just 8 hours of daylight in January to April’s brighter days highlights the welcoming embrace of longer days, inviting residents and visitors alike to revel in the beauty and vibrancy of the season as nature awakens. The gradual extension of daylight continues to foster a sense of optimism and renewal, setting the perfect backdrop for outdoor activities and gatherings as Koeln basks in the growing warmth of spring.

Average Daylight Hours in Koeln for April

The chart illustrates the variation in daylight duration in Koeln throughout the year, with April highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 27m10h11h 55m13h 52m15h 34m16h 27m15h 59m14h 27m12h 34m10h 38m8h 53m7h 58m
Data source: Koeln daylight hours, calculated by summing the hours between sunrise and sunset for each day.

April Winds in Koeln

As April arrives in Köln, Germany, the whispers of spring become palpable in the air, marked by a slight dip in average wind speed to 3.1 m/s (7 mph). This gentle breeze contrasts with the brisk winds of the earlier months, such as January (3.7 m/s) and February (3.9 m/s), creating a more serene atmosphere ideal for outdoor strolls amid blooming flowers. Interestingly, after the peak in March (3.5 m/s), April's winds signal a transition towards the warmer months. Looking ahead, residents can anticipate a gradual increase again in May (3.6 m/s), suggesting the playful dance of the seasons as Köln prepares for the vibrancy of summer. With wind speeds gradually decreasing through the summer into autumn, each month tells a story of changing rhythms, inviting everyone to enjoy the varying elements that make this beautiful city come alive.

Average April Wind Speed in Koeln

The chart displays monthly wind speed patterns in Koeln, with values for each month shown alongside April's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how April's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.73.93.53.1 m/s3.62.52.73.02.43.82.83.5
Data source: Koeln April wind data, generated using information from the Copernicus Climate Change Service.

How April Weather in Koeln Compares to Other Months

The weather in Koeln changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of April's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Koeln and find detailed weather information for every month.

When comparing the weather in April and January, it's clear that April tends to be milder and more variable. In April, temperatures range from a minimum of -3°C (26°F) to a maximum of 27°C (81°F), with an average of 10°C (51°F). This month also sees significantly less precipitation, averaging 38 mm (1.5 in) over about 9 days, while maintaining a humidity level of 84%. In contrast, January is colder, with temperatures ranging from -8°C (17°F) to a maximum of 15°C (59°F) and an average of only 3°C (38°F). Rainfall is more frequent in January, with 91 mm (3.6 in) of precipitation spread over 15 days, and slightly higher humidity at 91%. For more detailed insights into January weather, check out this link: Koeln weather in January.

April and February exhibit notable differences in weather patterns. April generally offers milder temperatures, with an average of 10°C (51°F) and highs reaching up to 27°C (81°F), compared to February’s cooler average of 5°C (41°F) and maximum temperatures of 20°C (68°F). While February experiences more significant precipitation, totaling 86 mm (3.4 in) over 13 days, April sees less rain with 38 mm (1.5 in) over only 9 days. Humidity levels slightly drop as April progresses, averaging 84% compared to February's higher humidity of 90%. For more detailed information, check out Koeln weather in February.

In comparing the weather of April and March, we see a notable warming trend. April boasts a minimum temperature of -3°C (26°F) and an average of 10°C (51°F), climbing to a maximum of 27°C (81°F), while March had more frigid temperatures with a minimum of -9°C (16°F) and an average of 7°C (45°F), peaking at 22°C (72°F). Precipitation was also less in April, with only 38 mm (1.5 in) over 9 days compared to March's 91 mm (3.6 in) over 15 days. Humidity levels remained relatively high in both months, at 84% in April and 87% in March, indicative of the wet conditions typical of early Spring. For a more detailed look at the March climate, you can refer to this link: Koeln weather in March.

April and May present a noticeable shift in weather patterns. In April, temperatures range from a chilly minimum of -3°C (26°F) to a pleasant average of 10°C (51°F), with a maximum peaking at 27°C (81°F). The month sees about 38 mm (1.5 in) of precipitation over 9 days and a high humidity level of 84%. In contrast, May brings warmer temperatures, with a minimum of 0°C (33°F), an average of 14°C (57°F), and a maximum hitting 33°C (91°F). However, it also experiences increased precipitation, totaling 66 mm (2.6 in) over 13 days, while humidity drops slightly to 77%. For a more detailed look at May weather, you can check Koeln weather in May.

April and June present distinct contrasts in weather. In April, temperatures can dip as low as -3°C (26°F) at night, with an average of 10°C (51°F) and highs reaching 27°C (81°F). The month also experiences significant humidity at 84% and sees about 38 mm (1.5 in) of rainfall over 9 days. In contrast, June offers a more temperate climate with minimum temperatures of 8°C (46°F), an average of 19°C (67°F), and maximums soaring up to 35°C (95°F). Although June has slightly more rainfall at 60 mm (2.4 in) spread over 10 days, the humidity is lower at 74%. For those looking to learn more about the specifics of June weather, check out Koeln weather in June.

April and July showcase a stark contrast in weather characteristics. In April, temperatures range from a chilly minimum of -3°C (26°F) to a pleasant maximum of 27°C (81°F), with an average of 10°C (51°F). This month sees about 38 mm (1.5 in) of precipitation over 9 days, coupled with a high humidity level of 84%, making it feel quite damp. In contrast, July boasts significantly warmer conditions, with minimum temperatures of 8°C (48°F) and a scorching maximum of 40°C (104°F), averaging around 20°C (68°F). This summer month experiences higher precipitation at 97 mm (3.8 in) across 12 days but has a lower humidity level of 72%, contributing to a different feel altogether. For a more detailed look at July weather, visit Koeln weather in July.

April and August exhibit significant differences in weather patterns. In April, temperatures range from a chilly minimum of -3°C (26°F) to a comfortable maximum of 27°C (81°F), with an average of 10°C (51°F). The month experiences moderate precipitation of 38 mm (1.5 in) over about 9 rainy days, accompanied by high humidity at 84%.

In contrast, August presents much warmer conditions, with temperatures fluctuating from a minimum of 7°C (44°F) to a scorching maximum of 37°C (99°F), averaging around 20°C (68°F). The humidity is relatively lower at 71%, but August also sees an increase in rainfall, totaling 78 mm (3.1 in) over approximately 14 days. For more information, you can visit: Koeln weather in August.

When comparing the weather in April and September, one notices some distinct differences. April tends to be cooler, with temperatures ranging from a minimum of -3°C (26°F) to a maximum of 27°C (81°F), and an average of 10°C (51°F). This month generally brings about 38 mm (1.5 in) of precipitation over 9 days, paired with high humidity levels at 84%. In contrast, September experiences warmer temperatures, with a minimum of 3°C (37°F) and a maximum of 34°C (93°F), averaging 16°C (60°F). Rainfall is higher at 65 mm (2.5 in) over 10 days, but the humidity is slightly lower at 81%. For more detailed insights, you can explore the Koeln weather in September.

April and October present distinct weather characteristics that mark the transition of spring to autumn. In April, temperatures can range from a chilly -3°C (26°F) to a pleasant average of 10°C (51°F), peaking at a warm 27°C (81°F), while precipitation is relatively light with about 38 mm (1.5 in) over 9 days and an humidity level of 84%. In contrast, October typically sees milder minimum temperatures around 1°C (34°F) and a slightly higher average of 12°C (54°F), with highs reaching up to 27°C (80°F). However, it is significantly wetter, with 97 mm (3.8 in) of precipitation over 15 days and a humidity level of 88%. For those interested in exploring more about October weather, you can find detailed information here: Koeln weather in October.

April and November offer distinct weather characteristics that reflect the transition of seasons. In April, temperatures range from a minimum of -3°C (26°F) to an average of 10°C (51°F), peaking at 27°C (81°F). This month sees a moderate amount of precipitation, with about 38 mm (1.5 in) falling over 9 days and humidity at 84%. In contrast, November experiences slightly cooler temperatures with a minimum of -4°C (26°F) and an average of 7°C (45°F), capping at a maximum of 20°C (68°F). Precipitation is higher in November, totaling 67 mm (2.6 in) over 13 days, and the humidity rises to 91%. For a more detailed look at weather patterns in November, check out Koeln weather in November.

April and December present contrasting weather profiles. In April, temperatures range from a chilly minimum of -3°C (26°F) to a pleasant maximum of 27°C (81°F), with an average of 10°C (51°F). The month experiences about 38 mm (1.5 in) of precipitation over 9 days and a humidity level of 84%. By contrast, December sees cooler temperatures, with a minimum of -5°C (24°F) and a maximum of 15°C (59°F), averaging 5°C (41°F). This month is much wetter, receiving 127 mm (5.0 in) of precipitation over 20 days, coupled with higher humidity at 92%. For a deeper look at December weather, you can visit Koeln weather in December.

Compare Koeln's Climate with Cities Worldwide

Conclusion: What to Expect From April Weather in Koeln

As April arrives in Koeln, the weather starts to shift, bringing a delightful blend of cool and warming temperatures. Unlike the harshness of winter, April offers milder days, with occasional peaks reaching a sunny 27°C (81°F), while still presenting a reminder of the lingering chill with some nights dipping down to freezing. This month stands out for its higher humidity levels and sporadic rainfall, marking a contrast to the drier winter months. With an average of nine days of precipitation, it’s essential for visitors and locals alike to embrace the springtime vibe amid occasional showers. For a detailed look at how April weather compares to other months and to plan your perfect visit, check out Koeln Climate.