Aarau Weather & Climate: Best Time to Visit
Temperatures in Aarau, Aargau, Switzerland, vary greatly throughout the year. July is the hottest month at 25°C (77°F), while January is the coldest at 5°C (41°F).
The city has a wet climate, receiving around 1472 mm (58 in) of rain/snowfall per year. July is the wettest month. The most sunshine falls in July, with an average of 7.9 hours of daily sunshine.
Monthly Temperature in Aarau
The climate in Aarau is known for significant temperature differences throughout the year, making the weather dynamic. On average, daytime temperatures range from a comfortable 25°C (77°F) in July to a chilly 5°C (41°F) in January.
Nighttime temperatures range from 14°C (57°F) in July to -1°C (30°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Aarau
Aarau has a notably wet climate with abundant precipitation, recording 1472 mm (58 in) of rain/snowfall per year. The amount of precipitation varies moderately throughout the year. The wettest month, July, sees around 165 mm (6.5 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, February, still receives a respectable 91 mm (3.6 in) of snow/rainfall. For more details, please visit our Aarau Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Aarau
In Aarau, summer days are longer and more sunny, with daily sunshine hours peaking at 7.9 hours in July. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 1.8 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Aarau by Month
The relative humidity is high throughout the year in Aarau.
The city experiences its highest humidity in November, reaching 82%. In April, the humidity drops to its lowest level at 68%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Aarau 3-Day Forecast
Check the conditions for any month of the year.
Best Time to Visit Aarau
Aarau's weather is most enjoyable during May, June, August and September, with comfortable temperatures from 19°C (67°F) to 24°C (76°F). The moderate conditions ensure pleasant weather for exploring the area. Expect varied weather during this period with rainfall between 120 mm (4.7 in) and 157 mm (6.2 in), providing a good balance of sunny and rainy days.The wettest months are July, when precipitation is at its highest. Seeking the perfect travel destination for this year? We've created a tool that suggests locations matching your desired weather. Let our weather planner guide your travel decisions.
