Aarau Weather and Climate: A Comprehensive Guide
Aarau experiences great temperature shifts.
The city's weather can transition from warm days
to cold weather.
It also has a relatively rain/snowy climate with high levels of precipitation.
Let's now guide you through the climate details for a complete overview.
Average maximum day and minimum night temperature
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 in July to a chilly 5°C in January.
Nighttime temperatures can drop, with average lows reaching -1°C in January.Check out our detailed temperature page for more information.
Temperature ranges by month
Precipitation and rainy days
Aarau has a notably wet climate with abundant precipitation, recording 1472 mm of rain/snowfall per year. The amount of precipitation varies moderately throughout the year. The wettest month, July, sees around 165 mm of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, February, still receives a respectable 91 mm of snow/rainfall.
The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
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
Average humidity
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
overcast and chance of slight rain overcast and no rain partly cloudy and no rainForecast for Aarau
2 m/s
3 m/s
2 m/s
Select a Month of Interest
Check the conditions for any month of the year.
The best time of year to visit Aarau in Switzerland
During the months of June, July and August you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
Most rainfall (rainy season) is seen in May, June, July and August.
July has an average maximum temperature of 25°C and is the warmest month of the year.
The coldest month is January with an average maximum temperature of 5°C.
July tops the wettest month list with 165 mm of rainfall.
February is the driest month with 91 mm of precipitation.
July is the sunniest month with an average of 237 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
