The best times to visit Aarau for ideal weather are

May 21st to October 14th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

 

 


Other Aarau Travel Info

Weather in Aarau

Temperature

Average temperatures in Aarau vary greatly. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 28th 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 Aarau, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 79.2°F (26.2°C) with temperatures rarely dropping below 56.8°F (13.8°C) at night.

Aarau Temperatures (Fahrenheit)

Key
High
Average
Low

Aarau Temperatures (Celsius)

Key
High
Average
Low

“Feels-Like” Temperatures

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.

Aarau Perceived Temperature (F)

Key
High
Average
Low

Aarau Perceived Temperature (C)

Key
High
Average
Low

 

Average Aarau 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.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 39.6 34.9 30.2
Feb 41.7 34.6 28.2
Mar 51.9 42.3 34
Apr 62.2 51.4 41
May 67.7 57.6 48
Jun 74 63.8 54.1
Jul 77.7 66.7 56.7
Aug 76.3 65.5 56.3
Sep 68.1 57.9 49.4
Oct 58.1 50.2 43.7
Nov 47.5 41.9 36.7
Dec 39.7 35.2 30.4

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 4.2 1.6 -1
Feb 5.4 1.4 -2.1
Mar 11.1 5.7 1.1
Apr 16.8 10.8 5
May 19.8 14.2 8.9
Jun 23.3 17.7 12.3
Jul 25.4 19.3 13.7
Aug 24.6 18.6 13.5
Sep 20.1 14.4 9.7
Oct 14.5 10.1 6.5
Nov 8.6 5.5 2.6
Dec 4.3 1.8 -0.9

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Aarau are February, April, and then September. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early to mid February. For example, on the week of February 12th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in early December with an average of 3 days of significant precipitation the week of December 3rd.

When can you find snow in Aarau? Weather stations report a good amount of seasonal snow likely to be deepest around December, especially close to early December. The best time to ski (if at all) in Aarau is often around around November 19th when fresh powder is deepest. 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 Aarau.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Aarau (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 24% 1.3 2.4
Feb 18% 1.4 1.6
Mar 19% 0.8 2.2
Apr 18% 0 2.4
May 27% 0 3.5
Jun 28% 0 3.8
Jul 32% 0 4.6
Aug 29% 0 4.4
Sep 18% 0 2.3
Oct 20% 0.7 2.5
Nov 23% 1.1 2.6
Dec 28% 2.6 3.6

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 24 3.3 6.1
Feb 18 3.6 4.1
Mar 19 2 5.6
Apr 18 0 6.1
May 27 0 8.9
Jun 28 0 9.7
Jul 32 0 11.7
Aug 29 0 11.2
Sep 18 0 5.8
Oct 20 1.8 6.4
Nov 23 2.8 6.6
Dec 28 6.6 9.1

 

Humidity and Wind

Aarau has some extremely humid months, with other comfortably humid months. The least humid month is April (57.1% relative humidity), and the most humid month is December (81.9%).

Wind in Aarau is usually extremely calm. The windiest month is March, followed by January and December. March’s average wind speed of around 3.1 knots (3.6 MPH or 5.7 KPH) is considered “light air.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in late March where average top sustained speeds reach 7.5 knots, which is considered a gentle breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Aarau.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

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 3 Barely noticeable 6.3 Light breeze
Feb 2.8 Barely noticeable 6.1 Light breeze
Mar 3.1 Barely noticeable 7.1 Light breeze
Apr 2.7 Barely noticeable 6.4 Light breeze
May 2.8 Barely noticeable 6.6 Light breeze
Jun 2.5 Barely noticeable 6.4 Light breeze
Jul 2.4 Barely noticeable 6.1 Light breeze
Aug 2.1 Barely noticeable 5.5 Light breeze
Sep 2 Barely noticeable 5.1 Light breeze
Oct 2 Barely noticeable 4.9 Light breeze
Nov 2.5 Barely noticeable 5.6 Light breeze
Dec 3 Barely noticeable 6.3 Light breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 78.2%
Feb 70.8%
Mar 61.8%
Apr 57.1%
May 61.6%
Jun 62.9%
Jul 62.3%
Aug 67.2%
Sep 73.1%
Oct 79.4%
Nov 81.8%
Dec 81.9%

 

Is it Safe to Travel to Aarau?

Our best data indicates this area is generally safe. As of Oct 07, 2019 there are no travel advisories or warnings for Switzerland; 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 Aug 22, 2019.


 

The Busiest and Least Crowded Months

The busiest month for tourism in Aarau, Switzerland is May, followed by January and June. 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 Aarau in November. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is somewhat extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 60.3 in November means 60.3% of the tourists vs. May.

 

 

Overall Aarau Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 71.2°F (21.8°C) and 48.3°F (9.1°C) with warmer temperatures in the later months. Rain is somewhat common with 5 to 8 days of significant precipitation per month. Spring is the busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the most precipitation with 8 to 10 days of precipitation per month. June – August is the second busiest season for tourism in Aarau, so lodging and other accommodations may cost slightly more.

Fall (September through November)

Fall daily highs range from 71.6°F (22°C) and 40.9°F (4.9°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 5 to 7 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is far too cold this time of year in Aarau to be enjoyable for warm weather travelers. The average high during this season is between 48.3°F (9.1°C) and 37.7°F (3.2°C). On average, it rains or snows a fair amount: 5 to 9 times per month. These times of year are fairly slow with tourists.

 

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