The best times to visit Aachen for ideal weather are
May 21st to October 7th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Aachen Travel Guide
Other Aachen Travel Info
Weather in Aachen
Average temperatures in Aachen vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a very low chance of rain or snow throughout the year. The area is somewhat temperate — in the 59th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Aachen, the hottest months are August, July, and then June. See average monthly temperatures below. The warmest time of year is generally mid August where highs are regularly around 77.1°F (25.1°C) with temperatures rarely dropping below 60.5°F (15.8°C) at night.
Aachen Temperatures (Fahrenheit)
Aachen Temperatures (Celsius)
The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.
Aachen Perceived Temperature (F)
Aachen Perceived Temperature (C)
Average Aachen Temperatures by Month
Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.
Chance of Precipitation
The graph below shows the % chance of rainy and snowy days in Aachen.
Snow on the Ground
The graph below shows the average snow on the ground in Aachen (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
Aachen has some extremely humid months, and above average humidity throughout the year. The least humid month is May (62.5% relative humidity), and the most humid month is December (85.2%).
Wind in Aachen is usually moderate. The windiest month is December, followed by January and October. December’s average wind speed of around 13.8 knots (15.9 MPH or 25.6 KPH) is considered “a moderate breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early January where average top sustained speeds reach 27.8 knots, which is considered a strong breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Aachen.
The graph below shows wind speed (max and average) in knots.
Average Wind Speeds
Show Wind Speeds
All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.
|Month||Avg. Wind||Avg. Wind Feel||Sustained High Wind||High Wind Feel|
|Jan||12.2||Significant breeze||17.6||Strong breeze|
|Feb||8.9||Gentle breeze||13.1||Significant breeze|
|Mar||7.3||Gentle breeze||11.3||Strong breeze|
|Apr||9.1||Gentle breeze||13.9||Significant breeze|
|May||8||Gentle breeze||12.2||Strong breeze|
|Jun||8||Gentle breeze||12.4||Significant breeze|
|Jul||7.6||Gentle breeze||11.6||Strong breeze|
|Aug||8||Gentle breeze||12.4||Significant breeze|
|Sep||8.5||Gentle breeze||13||Strong breeze|
|Oct||9.5||Gentle breeze||14.2||Significant breeze|
|Nov||8.8||Gentle breeze||13.5||Strong breeze|
|Dec||13.8||Significant breeze||19.5||Strong breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Aachen?
Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for Germany; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Oct 07, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Aachen, Germany is September, followed by August and October. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Aachen in June. Those willing to visit at these times will likely find it the least expensive month.
Estimated Tourism by Month
Most Popular Months to Visit
Overall Aachen Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderately cold. Highs range from 70.4°F (21.3°C) and 46.5°F (8.1°C) with warmer temperatures in the later months. Spring is fairly slow for tourism, which makes it a good time for those looking for deals.
Summer (June through August)
The middle-year months have comfortably cool weather with high temperatures that are comfortable. June – August is the second busiest season for tourism in Aachen, so lodging and other accommodations may cost slightly more.
Fall (September through November)
Fall daily highs range from 68.6°F (20.3°C) and 45.3°F (7.4°C), which will feel chilly given the humidity and wind. Tourism is the busiest during these months due to the weather, so hotels may be higher priced.
Winter (December through February)
Weather is too cold this time of year in Aachen to be enjoyable for warm weather travelers. The average high during this season is between 48.4°F (9.1°C) and 22.7°F (-5.2°C). These times of year are the slowest with tourists.