Expand
Contents
- The climate of Aachen
- The best time to visit Aachen
- The worst time to visit Aachen
- Spring weather in Aachen
- Summer weather in Aachen
- Autumn weather in Aachen
- Winter weather in Aachen
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Aachen
Aachen experiences a predominantly Marine west coast climate with warm summers, an orientation categorically defined under the Köppen climate classification as Cfb. The city's geographical position in western Germany contributes to a substantial influence by westerly winds from the Atlantic Ocean.
Throughout the year, temperatures in Aachen fluctuate moderately. High temperatures during the warmest months of July and August reach up to 22.5°C (72.5°F) and 22.7°C (72.9°F) respectively, while coldest months, January and February, present expected high temperatures of 4.3°C (39.7°F) and 5.5°C (41.9°F). Minimum temperatures correspondingly drop to 0.3°C (32.5°F) in January and peak at 13.7°C (56.7°F) in August. Humidity relative values display slight variations between 75% in April and August and 87% in January and December.
A consistent feature in Aachen climate demonstrates frequent rainfall throughout the year. Highest rainfall volumes of 55mm (2.17") are experienced in June, closely followed by August with 53mm (2.09"). The number of rainy days escalate to 19.4 in July, getting to a lower limit of 12.1 in February. Aachen also experiences episodes of snowfall, with highest volumes of 53mm (2.09") and 47mm (1.85") noted in February and January respectively and close to no snowfall from April to November.
Another significant aspect of Aachen's climate characterization includes daylight and sunshine data. Longest daylight hours of 16.4 are observed in June, retreating to 8.1 hours in December. Variations in duration of sunshine also exist, with the highest duration of 9.4 hours evident in August and 3.9 hours during the shorter days of December.
Wind speeds in Aachen take a partially cyclic trend, with lowest speeds of 11.1km/h (6.9mph) in July and highest of 17.3km/h (10.7mph) in December. Pressure values remain more or less steady all year, with only slight fluctuations between 1013.1mb in November and 1017.6mb in September.
Throughout the year, temperatures in Aachen fluctuate moderately. High temperatures during the warmest months of July and August reach up to 22.5°C (72.5°F) and 22.7°C (72.9°F) respectively, while coldest months, January and February, present expected high temperatures of 4.3°C (39.7°F) and 5.5°C (41.9°F). Minimum temperatures correspondingly drop to 0.3°C (32.5°F) in January and peak at 13.7°C (56.7°F) in August. Humidity relative values display slight variations between 75% in April and August and 87% in January and December.
A consistent feature in Aachen climate demonstrates frequent rainfall throughout the year. Highest rainfall volumes of 55mm (2.17") are experienced in June, closely followed by August with 53mm (2.09"). The number of rainy days escalate to 19.4 in July, getting to a lower limit of 12.1 in February. Aachen also experiences episodes of snowfall, with highest volumes of 53mm (2.09") and 47mm (1.85") noted in February and January respectively and close to no snowfall from April to November.
Another significant aspect of Aachen's climate characterization includes daylight and sunshine data. Longest daylight hours of 16.4 are observed in June, retreating to 8.1 hours in December. Variations in duration of sunshine also exist, with the highest duration of 9.4 hours evident in August and 3.9 hours during the shorter days of December.
Wind speeds in Aachen take a partially cyclic trend, with lowest speeds of 11.1km/h (6.9mph) in July and highest of 17.3km/h (10.7mph) in December. Pressure values remain more or less steady all year, with only slight fluctuations between 1013.1mb in November and 1017.6mb in September.
The best time to visit Aachen
Considering favorable weather conditions, it is highly advisable to visit Aachen during the warmer months from late spring to early autumn, typically between May and September. During this period, the city experiences the highest temperatures ranging from 14.5°C (58.1°F) to 22.7°C (72.9°F), as well as extended daylight hours from 13.8 to 16.4 hours. This period also guarantees ample sunshine duration, with averages between 8.1 and 9.4 hours. Besides warmer and longer days, the relative humidity percentages are slightly lower, making the overall weather more pleasant.
The worst time to visit Aachen
Visitors might want to avoid Aachen during the colder months, particularly between November and March. During these months, the city experiences its lowest temperatures, hitting a minimum of 0.3°C (32.5°F) in January. The daylight hours are also significantly shorter, with December registering the shortest daylight duration of 8.1 hours. Additionally, these months mark the peak season for snowfall, especially in January and February, where snow amounts reach up to 47mm (1.85") and 53mm (2.09") respectively.
Spring weather in Aachen
From March to May, the spring season in Aachen features a pleasant warm-up from the harsh winter. Temperatures start to rise gradually, with highs oscillating between 9.7°C (49.5°F) in March to 17.1°C (62.8°F) by May and lows rise from 2.7°C (36.9°F) to 8.1°C (46.6°F). The city experiences high rainfall volumes, the highest in May with 46mm (1.81"), spread over an average of approximately 18 days. Daylight hours stretch from 11.9 hours in March to 15.5 hours in May, concurrently with an increase in sunshine hours from 5.9 to 8.4.
Summer weather in Aachen
Summers in Aachen, June through August, bring the most agreeable weather. Temperatures escalate to their annual peaks with highs ranging from 20.3°C (68.5°F) in June to 22.7°C (72.9°F) in August and lows increase from 11.3°C (52.3°F) to 13.7°C (56.7°F). Daily sunshine hours are at their maximum, averaging between 8.9 and 9.4 hours, backed by the longest daylight hours of 16.4 in June. Rainfall is quite frequent, but usually in short spells.
Autumn weather in Aachen
Autumn in Aachen arrives in September and ends in November. This period presents a progressive drop in temperatures, with high temperatures falling from 18.8°C (65.8°F) in September to 9.2°C (48.6°F) in November. Daylight hours slim down from 12.6 hours in September to 9 hours in November. Rainfall remains consistent, though, with volumes staying between 32mm (1.26") and 37mm (1.46").
Winter weather in Aachen
Winters in Aachen, stretching from December to February, represent the coldest period. High temperatures hover around 4.2°C (39.6°F) to 5.5°C (41.9°F) while the lows plunge to 0.3°C (32.5°F) to 1.7°C (35.1°F). The city also witnesses an increase in snowfall, with January and February recording 47mm (1.85") and 53mm (2.09") respectively. Despite the lower temperatures, the city remains quite humid throughout winter, with relative humidity levels reaching 87%.
Weather in January
In Aachen, Germany, the weather starts the year with colder temperatures that are distinctively lower in comparison to later months. January experiences average maximum temperatures of only 4.3°C (39.7°F) and minimums that dip down to chilly 0.3°C (32.5°F). Weather in January »
Weather in February
February sees a mild increase in temperature in Aachen, Germany, but remaining on the cooler side. The swing between the temperatures becomes slightly wider, with highs reaching 5.5°C (41.9°F) and lows resting at 0.5°C (32.9°F). Weather in February »
Weather in March
By March, the weather in Aachen, Germany, aligns closer to the spring season. The maximum temperature experiences a significant leap, warming up to 9.7°C (49.5°F), and the minimum temperature comes up to 2.7°C (36.9°F). Sunshine hours increase and snowfall decreases, signifying the end of winter's reign. Weather in March »
Weather in April
April ushers in a clear indication of spring in Aachen, Germany, with warmer temperatures and significantly less snowfall. The monthly temperatures range from 14.5°C (58.1°F) at the higher end to 5.7°C (42.3°F) at the lower limit. Weather in April »
Weather in May
May brings Aachen, Germany, entirely into the grasp of the spring season. With maximum and minimum temperatures expanding to 17.1°C (62.8°F) and 8.1°C (46.6°F) respectively, balmy weather is more evident. As sunshine increases, it beckons for more outdoor activities and exploration around the city. Weather in May »
Weather in June
June marks the beginning of summer in Aachen, Germany, highlighted by prominent changes in weather conditions. The city basks in increased temperatures, with the high and low averages swelling to 20.3°C (68.5°F) and 11.3°C (52.3°F) respectively. Weather in June »
Weather in July
July registers as the warmest month in Aachen, Germany, amplifying the summer experience substantially. A noticeable incline in temperature occurs as high averages hit 22.5°C (72.5°F) and lows only descent to 13.3°C (55.9°F). The weather exudes a mix of warm days, mild nights, and an increase in humidity, creating a typical summer atmosphere. Weather in July »
Weather in August
August continues to uphold Aachen’s, Germany, warm and pleasant summer conditions. Interestingly, despite being towards the end of the summer period, high temperatures are recorded at a maximum of 22.7°C (72.9°F) with low averages at 13.7°C (56.7°F). Weather in August »
Weather in September
In Aachen, Germany, September signifies the onset of autumn, hinted at by the falling temperatures. With the highs dipping to 18.8°C (65.8°F) and the lows to a cooler 10.5°C (50.9°F), the change in seasons becomes evident. Weather in September »
Weather in October
By October, Aachen, Germany, is deep into the autumn season, which reflects in the changing weather conditions. A considerable drop in temperatures can be felt, with highs averaging at 14.2°C (57.6°F) and lows settling around 7.5°C (45.5°F). Weather in October »
Weather in November
In Aachen, Germany, November nudges further into the frosty realm of winter. Temperatures cool off more significantly, with maximum temperatures declining to 9.2°C (48.6°F) and minimum temperatures dropping to 4.5°C (40.1°F). Weather in November »
Weather in December
December ushers in the winter season in Aachen, Germany. With maximum temperatures resting at 5.6°C (42.1°F) and minimum temperatures plunging to a chilly 1.7°C (35.1°F), the city enters its coldest period. Snowfall begins to make its appearance, transforming Aachen into a picturesque winter wonderland. Weather in December »
[Resources]Frequently asked questions
What are the coldest months in Aachen?
Aachen's coldest temperatures are experienced in January, with average high temperatures of 4.3°C (39.7°F) and lows of 0.3°C (32.5°F).
What are the most humid months in Aachen?
January and December, with an average relative humidity of 87%, are most humid months in Aachen.
How many days does it rain in Aachen?
Throughout the year, in Aachen, there are 185.5 rainfall days, and 509mm (20.04") of precipitation is accumulated.
When does it snow in Aachen?
January through March, November and December are months with snowfall in Aachen, Germany.
How many days does it snow in Aachen?
Throughout the year, in Aachen, there are 20.4 snowfall days, and 156mm (6.14") of snow is accumulated.
What are the months with the lowest UV index in Aachen?
The months with the lowest UV index in Aachen are January, February, November and December, with an average maximum UV index of 2.
When does it snow the most in Aachen?
The month with the most snowfall in Aachen, Germany, is February, when snow falls for 5.6 days and typically aggregates up to 53mm (2.09") of snow.
What are the least humid months in Aachen?
The months with the lowest humidity in Aachen, Germany, are April and August, with an average relative humidity of 75%.
What is the driest month in Aachen?
The month with the least rainfall in Aachen, Germany, is April, when the rain falls for 14.6 days and typically collects 25mm (0.98") of precipitation.
When it does not snow in Aachen?
April through October are months without snowfall in Aachen, Germany.
What is the wettest month in Aachen?
June is the month with the most rainfall in Aachen. Rain falls for 17 days and accumulates 55mm (2.17") of precipitation.
When are the longest days in Aachen?
With an average of 16h and 24min of daylight, June has the longest days of the year in Aachen.
When is the highest UV index in Aachen?
June through August, with an average maximum UV index of 5, are months with the highest UV index.
What are the warmest months in Aachen?
Aachen's August weather, marked by an average high temperature of 22.7°C (72.9°F) and an average low temperature of 13.7°C (56.7°F), is the warmest in the year.
What month has the most sunshine in Aachen?
The month with the most sunshine is August, with an average of 9.4h of sunshine.
When is Daylight Saving Time (DST) in Aachen?
On Sunday, 27. October 2024, at 03:00, Daylight Saving Time ends in Aachen, and the time zone changes from CEST to CET. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 02:00, and the time zone reverts from CET to CEST.
What is the month with the shortest days in Aachen?
The month with the shortest days in Aachen, Germany, is December, with an average of 8h and 0min of daylight.
What is the month with the least sunshine in Aachen?
With an average of 3.9h of sunshine, December has the least sunshine of the year in Aachen, Germany.
Average temperature
Aachen, Germany
The warmest month (with the highest average high temperature) is August (22.7°C).
The month with the lowest average high temperature is January (4.3°C).
The month with the highest average low temperature is August (13.7°C).
The coldest month (with the lowest average low temperature) is January (0.3°C).
Average pressure
Aachen, Germany
- Average pressure in January:
1016.5mbar - Average pressure in February:
1015.6mbar - Average pressure in March:
1016.1mbar - Average pressure in April:
1015.8mbar - Average pressure in May:
1016.2mbar - Average pressure in June:
1016mbar
- Average pressure in July:
1015.6mbar - Average pressure in August:
1015.7mbar - Average pressure in September:
1017.6mbar - Average pressure in October:
1016.9mbar - Average pressure in November:
1013.1mbar - Average pressure in December:
1016.7mbar
The month with the highest atmospheric pressure is September (1017.6mbar).
The month with the lowest atmospheric pressure is November (1013.1mbar).
Average wind speed
Aachen, Germany
- Average wind speed in January:
16.4km/h - Average wind speed in February:
16.9km/h - Average wind speed in March:
15.2km/h - Average wind speed in April:
12km/h - Average wind speed in May:
11.7km/h - Average wind speed in June:
11.4km/h
- Average wind speed in July:
11.1km/h - Average wind speed in August:
11km/h - Average wind speed in September:
11.2km/h - Average wind speed in October:
13.3km/h - Average wind speed in November:
14.9km/h - Average wind speed in December:
17.3km/h
The windiest month (with the highest average wind speed) is December (17.3km/h).
The calmest month (with the lowest average wind speed) is August (11km/h).
Average humidity
Aachen, Germany
The months with the highest relative humidity are January and December (87%).
The months with the lowest relative humidity are April and August (75%).
Average rainfall
Aachen, Germany
The wettest month (with the highest rainfall) is June (55mm).
The driest month (with the least rainfall) is April (25mm).
Average rainfall days
Aachen, Germany
- Average rainfall days in January:
13 days - Average rainfall days in February:
12.1 days - Average rainfall days in March:
14.6 days - Average rainfall days in April:
14.6 days - Average rainfall days in May:
18.4 days - Average rainfall days in June:
17 days
- Average rainfall days in July:
19.4 days - Average rainfall days in August:
19 days - Average rainfall days in September:
13.4 days - Average rainfall days in October:
13.6 days - Average rainfall days in November:
15.3 days - Average rainfall days in December:
15.1 days
The month with the highest number of rainy days is July (19.4 days).
The month with the least rainy days is February (12.1 days).
Average snowfall
Aachen, Germany
The month with the highest snowfall is February (53mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days
Aachen, Germany
- Average snowfall days in January:
6.1 days - Average snowfall days in February:
5.6 days - Average snowfall days in March:
2 days - Average snowfall days in April:
0.3 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
1.5 days - Average snowfall days in December:
4.9 days
The month with the highest number of snowfall days is January (6.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Aachen, Germany
- Average daylight in January:
8h and 3min - Average daylight in February:
10h and 1min - Average daylight in March:
11h and 5min - Average daylight in April:
13h and 5min - Average daylight in May:
15h and 3min - Average daylight in June:
16h and 2min
- Average daylight in July:
16h and 0min - Average daylight in August:
14h and 3min - Average daylight in September:
12h and 4min - Average daylight in October:
10h and 4min - Average daylight in November:
9h and 0min - Average daylight in December:
8h and 0min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 0min).
- Average sunshine in January:
4h and 0min - Average sunshine in February:
4h and 2min - Average sunshine in March:
5h and 5min - Average sunshine in April:
8h and 3min - Average sunshine in May:
8h and 2min - Average sunshine in June:
8h and 5min
- Average sunshine in July:
9h and 2min - Average sunshine in August:
9h and 2min - Average sunshine in September:
8h and 1min - Average sunshine in October:
5h and 3min - Average sunshine in November:
4h and 2min - Average sunshine in December:
3h and 5min
The month with the most sunshine is August (Average sunshine: 9h and 24min).
The month with the least sunshine is December (Average sunshine: 3h and 54min).
Average sunshine days
Aachen, Germany
- Average sunshine days in January:
12.3 days - Average sunshine days in February:
11.1 days - Average sunshine days in March:
12.6 days - Average sunshine days in April:
13.1 days - Average sunshine days in May:
9.7 days - Average sunshine days in June:
9 days
- Average sunshine days in July:
9.1 days - Average sunshine days in August:
9.4 days - Average sunshine days in September:
13.4 days - Average sunshine days in October:
14.5 days - Average sunshine days in November:
11.7 days - Average sunshine days in December:
10.5 days
The month with the most sunshine days is October (14.5 days).
The month with the least sunshine days is June (9 days).
Average UV index
Aachen, Germany
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Aachen, Germany
The month with the most cloud cover is December (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 39).
Average visibility
Aachen, Germany
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (9km).
The months with the lowest visibility are January and December (8km).
Aachen, Germany
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location
