Monthly weather forecast and climate
Aarau, Switzerland

Weather in January

January, the same as December, is a wintry winter month in Aarau, Switzerland, with average temperature fluctuating between -3.3°C (26.1°F) and 2.9°C (37.2°F). With an average high-temperature of 2.9°C (37.2°F) and an average low-temperature of -3.3°C (26.1°F), January is the coldest month. Weather in January »

Weather in February

The last month of the winter, February, is also a wintry month in Aarau, Switzerland, with temperature in the range of an average low of -3.4°C (25.9°F) and an average high of 3.8°C (38.8°F). In February, the average high-temperature is practically the same as in January - a still wintry 3.8°C (38.8°F). Weather in February »

Weather in March

The first month of the spring, March, is a chilly month in Aarau, Switzerland, with average temperature varying between 9°C (48.2°F) and 0°C (32°F). In Aarau, the average high-temperature in March rises, from a wintry 3.8°C (38.8°F) in February, to a frosty 9°C (48.2°F). Weather in March »

Weather in April

April is a mild spring month in Aarau, Switzerland, with temperature in the range of an average high of 14.3°C (57.7°F) and an average low of 3.1°C (37.6°F). In April, the average high-temperature increases, from a chilly 9°C (48.2°F) in March, to a moderate 14.3°C (57.7°F). Weather in April »

Weather in May

The last month of the spring, May, is a comfortable month in Aarau, Switzerland, with average temperature fluctuating between 5.8°C (42.4°F) and 17.3°C (63.1°F). In Aarau, the average high-temperature marginally rises, from a moderate 14.3°C (57.7°F) in April, to an enjoyable 17.3°C (63.1°F). Weather in May »

Weather in June

June, the first month of the summer, in Aarau, is a pleasant month, with temperature in the range of an average low of 9.7°C (49.5°F) and an average high of 21.2°C (70.2°F). In Aarau, Switzerland, the average high-temperature marginally rises, from an enjoyable 17.3°C (63.1°F) in May, to an agreeable 21.2°C (70.2°F). Weather in June »

Weather in July

July is a warm summer month in Aarau, Switzerland, with average temperature fluctuating between 11.8°C (53.2°F) and 23.3°C (73.9°F). July and August, with an average high-temperature of 23.3°C (73.9°F), are the warmest months. Weather in July »

Weather in August

August, the last month of the summer, in Aarau, is another warm month, with average temperature varying between 23.3°C (73.9°F) and 11.8°C (53.2°F). July and August, with an average high-temperature of 23.3°C (73.9°F), are the warmest months. Weather in August »

Weather in September

September, the first month of the autumn, in Aarau, is also an enjoyable month, with temperature in the range of an average high of 18.8°C (65.8°F) and an average low of 8.2°C (46.8°F). In Aarau, the average high-temperature in September slightly decreases, from a warm 23.3°C (73.9°F) in August, to an enjoyable 18.8°C (65.8°F). Weather in September »

Weather in October

October, the same as September, in Aarau, Switzerland, is a moderate autumn month, with average temperature varying between 13.9°C (57°F) and 4.5°C (40.1°F). In Aarau, Switzerland, the average high-temperature in October marginally drops, from an enjoyable 18.8°C (65.8°F) in September, to a mild 13.9°C (57°F). Weather in October »

Weather in November

November, the last month of the autumn, in Aarau, is another chilly month, with average temperature ranging between min 1.2°C (34.2°F) and max 8.3°C (46.9°F). In Aarau, the average high-temperature decreases, from a moderate 13.9°C (57°F) in October, to a frosty 8.3°C (46.9°F). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Aarau, Switzerland, with temperature in the range of an average high of 4.2°C (39.6°F) and an average low of -1.7°C (28.9°F). In Aarau, the average high-temperature slightly decreases, from a chilly 8.3°C (46.9°F) in November, to a wintry 4.2°C (39.6°F). Weather in December »
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FAQ

What is the coldest month in Aarau?

With an average high-temperature of 2.9°C (37.2°F) and an average low-temperature of -3.3°C (26.1°F), January is the coldest month.

What is the most humid month in Aarau?

With an average relative humidity of 88%, January is the most humid month in Aarau.

How much does it rain in Aarau?

Throughout the year, there are 190.8 rainfall days, and 880mm (34.65") of precipitation is accumulated.

When does it snow in Aarau?

Months with snowfall in Aarau, Switzerland, are January through May, October through December.

How much does it snow in Aarau?

Throughout the year, there are 39.9 snowfall days, and 652mm (25.67") of snow is accumulated.

When is the lowest UV index in Aarau?

Months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2.

When does it snow the most in Aarau?

The month with the most snowfall is February when snow falls for 9.7 days and typically aggregates up to 153mm (6.02") of snow.

What are the least humid months in Aarau?

April and July, with an average relative humidity of 78%, are the least humid months.

What is the wettest month in Aarau?

The month with the most rainfall is May when the rain falls for 22.4 days and typically aggregates up to 106mm (4.17") of precipitation.

When it does not snow in Aarau?

In Aarau, Switzerland, snow does not fall in June through September.

When are the longest days in Aarau?

With an average of 15.9h of daylight, June has the longest days of the year.

What is the month with the highest UV index in Aarau?

Months with the highest UV index in Aarau, Switzerland, are June and July, with an average maximum UV index of 5.

What is the warmest month in Aarau?

Warmest months in Aarau are July and August, with an average high-temperature of 23.3°C (73.9°F).

What month has the most sunshine in Aarau?

August has the most sunshine of the year in Aarau, Switzerland, with an average of 10.4h of sunshine.

What is the driest month in Aarau?

September is the month with the least rainfall in Aarau. Rain falls for 14.5 days and accumulates 45mm (1.77") of precipitation.

What is the month with the shortest days in Aarau?

December has the shortest days of the year, with an average of 8.5h of daylight.

What is the month with the least sunshine in Aarau?

The month with the least sunshine is December, with an average of 5h of sunshine.

Average temperature
Aarau, Switzerland

Average temperature - Aarau, Switzerland

The warmest months (with the highest average high temperature) are July and August (23.3°C).
The month with the lowest average high temperature is January (2.9°C).

Months with the highest average low temperature are July and August (11.8°C).
The coldest month (with the lowest average low temperature) is February (-3.4°C).

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Average pressure
Aarau, Switzerland

Average pressure - Aarau, Switzerland

The month with the highest atmospheric pressure is December (1020.9mbar).
The month with the lowest atmospheric pressure is April (1015.6mbar).

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Average wind speed
Aarau, Switzerland

Average wind speed - Aarau, Switzerland

The windiest month (with the highest average wind speed) is March (8.8km/h).
The calmest month (with the lowest average wind speed) is August (5.9km/h).

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Average humidity
Aarau, Switzerland

Average humidity - Aarau, Switzerland

The month with the highest relative humidity is January (88%).
Months with the lowest relative humidity are April and July (78%).

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Average rainfall
Aarau, Switzerland

Average rainfall - Aarau, Switzerland

The wettest month (with the highest rainfall) is May (106mm).
The driest month (with the least rainfall) is September (45mm).

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Average rainfall days
Aarau, Switzerland

Average rainfall days - Aarau, Switzerland

The month with the highest number of rainy days is May (22.4 days).
The month with the least rainy days is February (10.6 days).

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Average snowfall
Aarau, Switzerland

Average snowfall - Aarau, Switzerland

The month with the highest snowfall is February (153mm).
Months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days
Aarau, Switzerland

Average snowfall days - Aarau, Switzerland

The month with the highest number of snowfall days is February (9.7 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Aarau, Switzerland

Average daylight / Average sunshine - Aarau, Switzerland

The month with the longest days is June (Average daylight: 15.9h).
The month with the shortest days is December (Average daylight: 8.5h).

The month with the most sunshine is August (Average sunshine: 10.4h).
The month with the least sunshine is December (Average sunshine: 5h).

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Average sunshine days
Aarau, Switzerland

Average sunshine days - Aarau, Switzerland

The month with the most sunshine days is October (15 days).
The month with the least sunshine days is May (6.6 days).

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Average UV index
Aarau, Switzerland

Average UV index - Aarau, Switzerland

Months with the highest UV index are June and July (UV index 5).
Months with the lowest UV index are January, February, October, November and December (UV index 2).

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Average visibility
Aarau, Switzerland

Average visibility - Aarau, Switzerland

Months with the highest visibility are March, April, July and August (9km).
Months with the lowest visibility are January, February, May, June, September, October, November and December (8km).

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